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Hirotaka Honda, Takeshi Matsumoto, Ryo Tamura, Katsuhiko Kanaizuka, At ...
2014 Volume 43 Issue 8 Pages
1189-1191
Published: August 05, 2014
Released on J-STAGE: August 05, 2014
Advance online publication: April 25, 2014
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Supplementary material
The reaction of tetraethyl [2,3-dihydroxy-1,4-phenylenebis(methylene)]bisphosphonate (Et
4LH
2) with [PtCl
2(DTBbpy)] (DTBbpy: 4,4′-di-
tert-butyl-2,2′-bipyridine) afforded [Pt(Me
4L)(DTBbpy)] (
1), [Pt(Bn
4L)(DTBbpy)] (
2), Na
2[Pt(Me
2L)(DTBbpy)] (
3), and [Pt(H
4L)(DTBbpy)] (
4) with tetramethyl-, tetrabenzyl-, half-protected, and fully-deprotected groups under different reaction conditions. The introduction of phosphonatomethyl groups at the 3,6-position of a redox-active catecholato unit led to slight shifts in charge-transfer bands and catecholato-centered redox processes in solution. The presence of deprotonated anchors in
3 resulted in the immobilization of the complex onto an indium-doped tin oxide electrode, demonstrating a well-defined redox response from the tethered complex.
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Sayaka Uchida, Kosuke Mizuno, Ryosuke Kawahara, Eri Takahashi, Noritak ...
2014 Volume 43 Issue 8 Pages
1192-1194
Published: August 05, 2014
Released on J-STAGE: August 05, 2014
Advance online publication: April 25, 2014
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Supplementary material
By utilizing the idea of Coordination Programming, postsynthesis modification of a porous ionic crystal K
2[Cr
3O(OOCH)
6(mepy)
3]
2[α-SiW
12O
40]·8H
2O (mepy: 4-methylpyridine) (
1) proceeded in a single-crystal-to-single-crystal manner. Basicities of the pyridine derivatives and potassium salts were keys to the selective formation of [Cr
3O(OOCH)
6(mepy)
2(H
2O)]
+ as a macrocation. Results of the alcohol sorption isotherms showed that the sorption capacity increased almost twice without changes in the size of the channel opening by the postsynthesis modification.
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Hiroya Homura, Bunsho Ohtani, Ryu Abe
2014 Volume 43 Issue 8 Pages
1195-1197
Published: August 05, 2014
Released on J-STAGE: August 05, 2014
Advance online publication: April 25, 2014
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Supplementary material
Efficient photoanodes of tungsten oxide (WO
3) were fabricated on three-dimensional conductive carbon microfiber felts (CMFs). Monolayers of fine WO
3 particles with a diameter of ca. 150 nm were successfully loaded on the surface of CMFs by simple impregnation of a mixed aqueous solution of ammonium metatungstate and poly(ethylene glycol) followed by calcination in air, affording higher photocurrent densities and IPCE values for water oxidation under visible light than those on a conventional porous WO
3 electrode prepared on a conductive glass substrate.
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Nobutaka Shioya, Takafumi Shimoaka, Takeshi Hasegawa
2014 Volume 43 Issue 8 Pages
1198-1200
Published: August 05, 2014
Released on J-STAGE: August 05, 2014
Advance online publication: April 25, 2014
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Infrared (IR) p-polarized multiple-angle incidence resolution spectrometry (p-MAIRS) has been employed for the first time to reveal the molecular orientation in two different poly(3-hexylthiophene) (P3HT) thin films having face-on and edge-on orientations. The C–H out-of-plane deformation vibration mode (ca. 820 cm
−1) of the thiophene ring is found to be highly localized on the ring, which is quite useful for molecular orientation analysis coupled with IR p-MAIRS. On the other hand, the C–H stretching vibration region is useful for determining the molecular order, conformation, and folding of the hexyl chain via MAIRS dichroism.
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Takanari Togashi, Atsushi Izumi, Hiroki Kon, Katsuhiko Kanaizuka, Mana ...
2014 Volume 43 Issue 8 Pages
1201-1203
Published: August 05, 2014
Released on J-STAGE: August 05, 2014
Advance online publication: May 01, 2014
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Nanoneedle structures composed of a porphyrin derivative combined with a tris(bipyridine)ruthenium have been conveniently fabricated on an indium tin oxide electrode via continuous silane coupling reaction that proceeds on the electrode immersed in a solution of the porphyrin derivative and tetrachlorosilane. A stable cathodic photocurrent was generated from the nanoneedles upon photoirradiation.
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Hiroshi Nakajima, Soji Miyazaki, Takaaki Itoh, Mao Hayamura, Yoshihito ...
2014 Volume 43 Issue 8 Pages
1204-1206
Published: August 05, 2014
Released on J-STAGE: August 05, 2014
Advance online publication: May 01, 2014
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Supplementary material
An azurin–DNA conjugate (Azu–DNA) where the DNA part contains the binding sequence of a carbon monoxide (CO)-dependent transcriptional regulator, CooA, has been prepared. CooA in the CO-bound form (CO–CooA) showed specific binding to Azu–DNA. The association of CO–CooA with Azu–DNA affects the electron transfer (ET) between Azu–DNA and its redox partner protein, cytochrome
c552. Consequently, the CO-dependent modulation of ET was achieved. This could be a potential platform for a novel biobased sensor, which exploits the transcriptional regulator as a detection module and whose readout is immediately transduced to a readily processable electronic signal.
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Shinya Sudo, Shunjiro Nagata, Kenta Kokado, Kazuki Sada
2014 Volume 43 Issue 8 Pages
1207-1209
Published: August 05, 2014
Released on J-STAGE: August 05, 2014
Advance online publication: May 01, 2014
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Supplementary material
Facile mixing of a liquid metal, organic medium, and surfactant by sonication provided well-dispersed and uniformly sized gallium nanoparticles (GaNP). Furthermore, transformation to other noble metal nanoparticles having a similar size distribution was achieved via metal exchanging redox process utilizing the GaNP as the precursor.
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Shunpei Nobusue, Yoshito Tobe
2014 Volume 43 Issue 8 Pages
1210-1212
Published: August 05, 2014
Released on J-STAGE: August 05, 2014
Advance online publication: May 01, 2014
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Supplementary material
Treatment of octadehydrotribenzo[14]annulene ([14]DBA) with bromine or iodine gave the corresponding tetrahalo-substituted benzodiindenocyclooctatetraenes selectively via tandem twofold transannular bond formations. The exclusive mode of cyclization in contrast to that observed for the nucleophile-induced cyclizations is interpreted in terms of the relative stabilities of the key intermediates in both processes.
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Kohei Seki, Kazuyoshi Uematsu, Kenji Toda, Mineo Sato
2014 Volume 43 Issue 8 Pages
1213-1215
Published: August 05, 2014
Released on J-STAGE: August 05, 2014
Advance online publication: May 03, 2014
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This study investigated the luminescence properties of novel deep red phosphors Ca
14Zn
6M
10O
35:Mn
4+ (M = Al
3+ and Ga
3+). These phosphors efficiently excited using a blue LED light. It exhibited a deep red emission around 713 nm. The luminescence intensities of CZA:Mn
0.03 and CZG:Mn
0.03 excited at 450 nm were, respectively, about 2.2 and 2.7 times higher than that of YAG:Ce
3+ (P46). These phosphors also show little temperature quenching, but more than that shown by YAG:Ce
3+ at 423 K. These results show that the deep red phosphor Ca
14Zn
6M
10O
35:Mn
4+ (M = Al
3+ and Ga
3+) is a beneficial phosphor for use in indoor plant cultivation.
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Xingwen Zhang, Hongwei Yu, Hongping Wu, Shilie Pan, Lili Liu, Anqing J ...
2014 Volume 43 Issue 8 Pages
1216-1218
Published: August 05, 2014
Released on J-STAGE: August 05, 2014
Advance online publication: May 03, 2014
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Supplementary material
Two new borates, Sr
8MB
18O
36 (M = Zn or Cd) with expected formulas representing the Sr:M ratio of 8:1, were synthesized. Their structures were determined by single-crystal X-ray diffraction. They both crystallize in the same space group
R−3
c and possess isolated [B
18O
36]
18− anionic group. In this work, not only Sr
8MB
18O
36 (M = Zn or Cd) crystals were designed but they were also synthesized successfully. In addition, the reasons why the ratio of Sr:M is 8:1 in Sr
8MB
18O
36 (M = Zn or Cd) are explained.
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Takashi Kaneko, Yuta Togashi, Masahiro Teraguchi, Toshiki Aoki
2014 Volume 43 Issue 8 Pages
1219-1221
Published: August 05, 2014
Released on J-STAGE: August 05, 2014
Advance online publication: May 09, 2014
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Supplementary material
5,4′-Bis(3,5-di-
tert-butyl-4-acetoxyphenyl)-2-ethynyl-2′-iodostilbene was synthesized and polymerized by the Sonogashira reaction to give the corresponding regioregular head-to-tail poly(1,2-phenyleneethynylene-1,2-phenylenevinylene). The polymer was converted to the corresponding hydroxy polymer after complete elimination of the protecting acetyl group by treatment with an alkaline solution. It was found that the folded helical conformation was preferred for the polymer containing the poly(1,2-phenylenevinylene) structure upon addition of methanol to the chloroform solution owing to the solvophobic interaction.
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Satoshi Kuramochi, Graham N. Newton, Takuya Shiga, Hiroki Oshio
2014 Volume 43 Issue 8 Pages
1222-1223
Published: August 05, 2014
Released on J-STAGE: August 05, 2014
Advance online publication: April 25, 2014
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Supplementary material
A dinuclear Ru complex, [{Ru(tpy)Cl}
2(µ-L)](PF
6)
2 (
1), was synthesized by the reaction of the flexible bridging ligand L (=
N,
N′-bis(5-bipyridylhexyl)-
cis-1,4-cyclohexanediamine) with [Ru(tpy)Cl
3]. The complex contained two [Ru(tpy)(bpy)Cl]
+ moieties linked by L, and the reaction of
1 with AgNO
3 allowed for isolation of the ligand-exchanged product [{Ru(tpy)(Solv.)}
2(µ-L)](PF
6)
4 (
2). The behavior of
2 as a CO
2 reduction electrocatalyst was investigated in acetonitrile. Under N
2, two reduction peaks appeared at
Ep,c = −1.08 (tpy/tpy
•−) and −1.40 V (bpy/bpy
•−) vs. NHE. In a saturated CO
2 solution, a further reduction peak, at
Ep,c = −1.60 V, showed significant current enhancement consistent with electrocatalytic CO
2 reduction. The primary product of the CO
2 reduction was CO, and the turnover frequency was calculated to be ca. 1.4 s
−1.
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Kazumasa Ueda, Hiroki Kusanagi, Hiroki Nanbo, Yoshiumi Kohno, Tomoe Eg ...
2014 Volume 43 Issue 8 Pages
1224-1226
Published: August 05, 2014
Released on J-STAGE: August 05, 2014
Advance online publication: May 01, 2014
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Supplementary material
Two methoxycarbonyl-substituted 2,5-di(1,3-dithiol-2-ylidene)-1,3-dithiolane-4-thione derivatives with alkylsulfanyl groups of different sizes were synthesized, and their redox and electronic properties and crystal structures were investigated. The difference in the solid-state absorption spectra occurs because of differences in the intermolecular interactions caused by their molecular packings.
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Naoki Nishida, Yasuhiro Kojima, Hideki Tanaka
2014 Volume 43 Issue 8 Pages
1227-1229
Published: August 05, 2014
Released on J-STAGE: August 05, 2014
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Supplementary material
Chiroptically active Ag triangular nanoplates were synthesized by the ligand-exchange reaction of achiral Ag nanoplates with chiral
D- or
L-penicillamine molecules. Analysis of the chiroptical properties of the synthesized nanoplates by circular dichroism spectroscopy revealed intense Cotton effects, with wavelengths that corresponded to those of the surface plasmon resonances for the nanoplates. Enantiomeric excess and pH dependence of these effects were also measured to explore the origin of the chiroptical activity of the nanoplates.
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Hiroki Noma, Keishi Ohara, Toshio Naito
2014 Volume 43 Issue 8 Pages
1230-1232
Published: August 05, 2014
Released on J-STAGE: August 05, 2014
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Supplementary material
[Cu(dmit)
2]
2− formally consists of a magnetic Cu
2+ ion (
S = 1/2) and closed-shell π-conjugated dmit
2− ligands. However, it has been determined by electron spin resonance and molecular orbital calculations that the majority (91–100%) of the spin delocalizes over the ligands in the ground state, while the spin significantly (40–90%) localizes on Cu under UV irradiation. Considering the results of X-ray structural analyses under UV irradiation, the spin distribution varies depending on the wavelengths irradiated and retaining the square-planar coordination geometries.
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Arada Chaiyanurakkul, Lei Gao, Takashi Nishikata, Keisuke Kojima, Hide ...
2014 Volume 43 Issue 8 Pages
1233-1235
Published: August 05, 2014
Released on J-STAGE: August 05, 2014
Advance online publication: May 01, 2014
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Supplementary material
Platinum nanoparticles dispersed in the ammonium salts of hyperbranched polystyrene, Pt@HPS-NR
3Cl, catalyzed the hydrogenation of ketones and aldehydes when water was used as the solvent without any coexisting organic solvents. The significant increase in the reaction rate was observed when an organo-dispersible Pt@HPS-N
+(C
8H
17)
3Cl
− (
1a) was used as the catalyst, whereas catalyst recycling was achieved with water-dispersible Pt@HPS-N
+(C
4H
9)
3Cl
− (
1b).
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Yusuke Takahashi, Youhei Miura, Naoki Yoshioka
2014 Volume 43 Issue 8 Pages
1236-1238
Published: August 05, 2014
Released on J-STAGE: August 05, 2014
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Supplementary material
A new radical, 7-phenyl-1,3-bis(4-biphenylyl)-1,4-dihydro-1,2,4-benzotriazin-4-yl (
2), was prepared from the iodo group-substituted benzotriazinyl radical
1 with phenyltriolborate salt by the Suzuki–Miyaura cross-coupling reaction at room temperature. An X-ray crystal structural analysis clarified its crystal structure. ESR measurements and DFT calculations revealed that its unpaired electron was more delocalized over the molecule than that of Blatter’s radical due to the substituent effect.
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Minggui Shen, Juan Wang, Shibin Shang, Zhanqian Song
2014 Volume 43 Issue 8 Pages
1239-1241
Published: August 05, 2014
Released on J-STAGE: August 05, 2014
Advance online publication: May 02, 2014
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Supplementary material
Novel spiro[indoline-3,9′-tetrazolo[5,1-
b]quinazoline]-2,8′(5′
H)-dione derivatives have been synthesized by the three-component reaction of isatin, 5-amino-1
H-tetrazole, and 5,5-dimethylcyclohexane-1,3-dione in PEG–H
2O medium catalyzed by
p-TSA. This protocol provides a simple one-step procedure with the advantages of easy work-up, mild reaction conditions, and environmental benignity.
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Young-Hui Ko, Ju-Won Lee, Won-Kook Choi, Sung-Ryong Kim
2014 Volume 43 Issue 8 Pages
1242-1244
Published: August 05, 2014
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Simple solution spray coating of graphene oxide (GO) and Ag nanowires (AgNWs) was employed to prepare transparent conductive films (TCFs). We used air and ultrasonic spraying, and the effects of different spraying methods on the properties of TCFs were investigated. Ultrasonic spraying exhibited a significant decrease in the length of AgNWs and increase of sheet resistance. Thin two-dimensional reduced graphene oxide (rGO) prepared by ultrasonic spraying with tightly bound conductive Ag nanowires prepared by air spraying effectively decreased the sheet resistance and increased the transparency of the hybrid films. Air-sprayed rGO (0.25 mL)–AgNW (0.45 mL)/poly(methyl methacrylate) exhibited a sheet resistance of 328 Ω/□; however, the ultrasonic-sprayed rGO (0.25 mL)–air-sprayed AgNW (0.45 mL) on a poly(methyl methacrylate) showed a significant improvement of sheet resistance to 86 Ω/□ with a light transmittance of 78%. The sprayed rGO–AgNW showed little change in sheet resistance after 200 bending cycles with a radius curvature of 10 mm.
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Yuki Koizumi, Naoki Shida, Ikuyoshi Tomita, Shinsuke Inagi
2014 Volume 43 Issue 8 Pages
1245-1247
Published: August 05, 2014
Released on J-STAGE: August 05, 2014
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Supplementary material
Iterative electrodeposition of metals on both the poles of conductive particles by alternating current bipolar electrochemical reduction of metal ions was successfully carried out to afford bifunctionalized particles, which were partially covered with metals such as gold and platinum on both the poles in a site-selective manner.
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Zaenal Awaludin, Takeyoshi Okajima, Takeo Ohsaka
2014 Volume 43 Issue 8 Pages
1248-1250
Published: August 05, 2014
Released on J-STAGE: August 05, 2014
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Supplementary material
A novel technique to activate tantalum pentaoxide is introduced. An electrochemical reductive treatment in acidic solution is found to be an effective method for transforming the Ta
5+ in Ta
2O
5 to Ta
<5+, in such a way that it is active for hydrogen evolution. This opens a new route to the development of metal oxide-based catalysts.
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Takao Shoji, Shokaku Kim, Kazuhiro Chiba
2014 Volume 43 Issue 8 Pages
1251-1253
Published: August 05, 2014
Released on J-STAGE: August 05, 2014
Advance online publication: May 09, 2014
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Supplementary material
Conjugated oligonucleotides attract interest from various areas such as medicine and nanotechnology. Common synthetic methods, however, rely on heterogeneous coupling strategies that often give low yield. This report describes a new synthetic strategy for conjugated oligonucleotides using an alkyl-chain-soluble support, which allows high-yielding conjugation with various reporter molecules in homogeneous environment. Furthermore, we demonstrated efficient biconjugation due to successive introduction of thiol and amine into one linker.
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Yoshiyuki Nonoguchi, Tomoko Murayama, Manabu Ishizaki, Katsuhiko Kanai ...
2014 Volume 43 Issue 8 Pages
1254-1256
Published: August 05, 2014
Released on J-STAGE: August 05, 2014
Advance online publication: May 10, 2014
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Supplementary material
The self-assembly of Prussian blue nanoparticles and single-walled carbon nanotubes is demonstrated by using analytical TEM. The nanotube composites containing compositionally tunable Prussian blue nanoparticles are, for the first time, applied to finely modulate their Seebeck coefficients.
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Hitoshi Watarai, Fumie Hiramatsu, Hoang Trong Tien Duc, Tran Thi Ngoc ...
2014 Volume 43 Issue 8 Pages
1257-1259
Published: August 05, 2014
Released on J-STAGE: August 05, 2014
Advance online publication: May 13, 2014
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The J-aggregates of the diprotonated tetraphenylporphin formed in the o/w microemulsions including 2-alkyl alcohol, Triton X-100, toluene, and sulfuric acid, exhibited an induced circular dichroism (ICD) spectra corresponding to the chirality of the alcohol. The ICD intensity remarkably depended on the concentrations of Triton X-100 and sulfuric acid as well as 2-alkyl alcohol. The results suggested the nonstoichiometric formation of the chiral conformation of the nano-J-aggregates in the microemulsion droplets.
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Kazuki Sakashita, Koji Masutomi, Keiichi Noguchi, Ken Tanaka
2014 Volume 43 Issue 8 Pages
1260-1262
Published: August 05, 2014
Released on J-STAGE: August 05, 2014
Advance online publication: May 20, 2014
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Supplementary material
It has been established that a cationic rhodium(I)–BINAP complex catalyzes the enantioselective [2 + 2 + 2] cycloaddition of a tosylamide-linked 5-allenal and 5-allenone with internal alkynes, leading to bicyclic oxygen heterocycles.
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Chao Liu, Hongxia Yan, Shuyao Feng, Tingting Li, Mengmeng Zhang
2014 Volume 43 Issue 8 Pages
1263-1265
Published: August 05, 2014
Released on J-STAGE: August 05, 2014
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Supplementary material
Grafting of hyperbranched cyclotriphosphazene polymer (HBP) onto reduced graphene oxide (HBP-RGO) surface was achieved by the repeated reactions between the chlorine groups of hexachlorocyclotriphosphazene and the amino groups of hexamethylenediamine. FTIR and XPS analyses showed that hyperbranched cyclophosphazene-grafted graphene had been successfully prepared. AFM results showed that HBP-RGO had a dendritic structure as designed. TGA analysis indicated that HBP-RGO had good thermal stability. The dispersion showed that HBP-RGO is amphiphilic.
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Satoshi Kojima, Narumi Banden, Yohsuke Yamamoto
2014 Volume 43 Issue 8 Pages
1266-1268
Published: August 05, 2014
Released on J-STAGE: August 05, 2014
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Supplementary material
Tetrakis(2-pyridyl)stannane (
o-Py
4Sn), which bears only weakly nucleophilic and Lewis basic pyridines, and a weakly acidic tetraaryltin moiety, was found to efficiently catalyze the reaction between acetic anhydride and alcohols. The reaction rate measurements using 1-phenylethanol show the catalytic activity of
o-Py
4Sn to be up to 20% of that of 4-(dimethylamino)pyridine (DMAP) and more than 100 times that of pyridine alone. Furthermore, the reaction using (
t-BOC)
2O was found to be comparable to that with DMAP, with
o-Py
4Sn being more selective. Thus, a highly efficient cooperative effect is operative with
o-Py
4Sn.
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Takane Imaoka, Mayu Fushimi, Atsushi Kimoto, Yukiyasu Okamoto, Kensaku ...
2014 Volume 43 Issue 8 Pages
1269-1271
Published: August 05, 2014
Released on J-STAGE: August 05, 2014
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Supplementary material
Monodispersed Au nanoparticles composed of only 14 atoms were synthesized by a dendrimer-based template method. A spin-coated dendrimer film containing these Au nanoparticles exhibited significant resistive switching functions during the reversible scan of an applied bias.
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Masahiro Watanabe, Masahiro Fujiwara, Kazuhiko Ishikawa
2014 Volume 43 Issue 8 Pages
1272-1274
Published: August 05, 2014
Released on J-STAGE: August 05, 2014
Advance online publication: May 01, 2014
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Immobilized enzymes are finding use in bioreactors for a wide range of applications such as in research, medicine, and industry. One of the greatest benefits of immobilized enzymes is that the enzymes can be used repeatedly. In this study, we encapsulated the hyperthermophilic β-glucosidase from
Pyrococcus furiosus (BGLPf) into silica microcapsules. BGLPf plays an important role in the high-temperature hydrolysis of cellooligosaccharides found in biomass. This technology provides a new tool for the effective saccharification of biomass.
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Yusuke Miyake, Hirona Takahashi, Nobuyuki Akai, Kazuhiko Shibuya, Akio ...
2014 Volume 43 Issue 8 Pages
1275-1277
Published: August 05, 2014
Released on J-STAGE: August 05, 2014
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Supplementary material
Photodissociation of three oxime ester compounds was investigated using time-resolved electron paramagnetic resonance spectroscopy. Direct evidences for the appearance of methyl and iminyl radicals were obtained, and their reactivity toward the acrylate monomer was studied.
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Lizhu Liu, Jinfeng Li, Xiaorui Zhang, Ke Jin
2014 Volume 43 Issue 8 Pages
1278-1280
Published: August 05, 2014
Released on J-STAGE: August 05, 2014
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Epoxy–polyacrylate emulsions with three-layer core–shell structures were synthesized employing a two-stage emulsion polymerization procedure. The films prepared from the emulsions showed signs of self-stratification. This method may be applicable to the study of self-stratifying coatings.
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Tetsu Tatsuma, Yoshinori Kuroiwa, Kazuyuki Ishii, Kazuaki Kudo, Akiyos ...
2014 Volume 43 Issue 8 Pages
1281-1283
Published: August 05, 2014
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Prussian blue (Fe
III4[Fe
II(CN)
6]
3) electrochemically deposited on an indium tin oxide electrode was loaded with cesium ion in a diluted aqueous CsCl solution (ca. 40 ppb) followed by reduction or oxidation. Although reduction of Prussian blue does not increase the capacity of cesium uptake, oxidation of Prussian blue releases the entrapped cesium ion.
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Yunfeng Qiu, Yuyang Qin, Zhuo Ma, Wujiong Xia
2014 Volume 43 Issue 8 Pages
1284-1286
Published: August 05, 2014
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Supplementary material
Efficient synthesis of various propargylamines through the coupling reaction of aldehydes, alkynes, and amines in the presence of chitosan/Zn(NO
3)
2 was developed in this study. The catalysts could be easily and quantitatively recycled without loss of activity. Chitosan is abundant in nature, and commercially available zinc salts are cheap. This produces highly active catalysts with superior performance for potential applications in industry.
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Kazuhiko Maeda
2014 Volume 43 Issue 8 Pages
1287-1288
Published: August 05, 2014
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Supplementary material
A high apparent quantum yield (AQY) of 25 ± 1% (at 365 nm) for water oxidation in the presence of iodate ions was achieved using a rutile titanium(IV) oxide that has relatively low density of surface defects.
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Jun Terao, Takuro Hosomi, Hiroshi Masai, Wakana Matsuda, Shu Seki, Tet ...
2014 Volume 43 Issue 8 Pages
1289-1291
Published: August 05, 2014
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Supplementary material
We synthesized an insulated bridging ligand consisting of a π-conjugated backbone sheathed by permethylated α-cyclodextrin and terpyridyl moieties at either end. This bridging ligand was able to coordinate with Fe
2+ to afford an insulated metallopolymer that was elongated through coordination bonds. The molecular wire exhibited a reversible response to a chemical redox stimulus.
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Shuhei Shibano, Tribidasari A. Ivandini, Chiaki Terashima, Kazuya Naka ...
2014 Volume 43 Issue 8 Pages
1292-1293
Published: August 05, 2014
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An electrochemical method was developed for biodiesel, i.e., fatty acid methyl ester (FAME), production. A two-compartment cell completed with a cation-exchange separating membrane was utilized to minimize recombination between protons and hydroxide or methoxide ions, which leads to the low product yield. In addition to the product yield increase, the method was found to reduce the requirement of organic salt to be only in the cathode chamber. Electrolysis at low voltage (4.6 V) resulting high product yield (ca. 94% in 2 h) at Pt as well as a boron-doped diamond (BDD) electrode as the cathode, suggested the system was free from the dependence on electrode types.
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Binod Babu Shrestha, Yuki Morita, Tatsuhiro Kojima, Masaki Kawano, Shu ...
2014 Volume 43 Issue 8 Pages
1294-1296
Published: August 05, 2014
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Single crystals of sumanenetrione and the iodinated derivative were found to possess a columnar packing structure with characteristic eclipsed stacks in a convex-to-concave fashion. In each column, the molecules are perfectly stacked without twisting and slipping in contrast to pristine sumanene. The neighboring columns are arranged in the opposite directions.
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Shuhei Higashibayashi, Binod Babu Shrestha, Yuki Morita, Masahiro Ehar ...
2014 Volume 43 Issue 8 Pages
1297-1299
Published: August 05, 2014
Released on J-STAGE: August 05, 2014
Advance online publication: May 10, 2014
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Supplementary material
The electrochemical reduction of sumanenetrione by cyclic voltammetry showed stepwise multielectron reduction. Cyclic voltammograms of the stepwise first and second one-electron reduction exhibited reversible waves with associated reduction potentials that were almost equivalent to those of C
60. EPR studies of the chemically generated monoanion and dianion of sumanenetrione, in conjunction with theoretical calculations, revealed their structures. The radical anion exhibited
C3v symmetric spin delocalization over the entire bowl structure. The radical anion exhibited several absorption bands covering the whole visible to near-IR region. The nature of excitations was assigned by SAC/SAC-CI SD-
R calculations. The dianion has a singlet ground state with a large energy gap between the singlet and triplet states. The dianion, too, has
C3v symmetry with delocalization over the bowl structure. The major contributing structure of the dianion is the closed-shell configuration rather than the open-shell biradical configuration.
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Taihei Yamada, Kenta Kokado, Yuji Higaki, Atsushi Takahara, Kazuki Sad ...
2014 Volume 43 Issue 8 Pages
1300-1302
Published: August 05, 2014
Released on J-STAGE: August 05, 2014
Advance online publication: May 10, 2014
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Supplementary material
Herein, we describe the preparation of lipophilic polyelectrolyte brush (LPB) and its morphology variation induced by immersing in various organic solvents. In particular, the use of 1,2-dichloroethane resulted in twining of large fibers due to the extension of polymer chains, caused by both good compatibility of nonionic moiety and dissociation of ionic moiety. To our best knowledge, this is the first example for PE brush functioning in nonpolar organic media.
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Soyoung Choi, Yu Kyung Eom, Hwan Kyu Kim, Daewon Sohn
2014 Volume 43 Issue 8 Pages
1303-1305
Published: August 05, 2014
Released on J-STAGE: August 05, 2014
Advance online publication: May 10, 2014
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The monolayer behaviors of two dendrimers containing a hydrophilic core group (carboxy group) and hydrophobic branches (quinoxaline and methoxyphenyl groups), 2,3-bis{4-[2,3-bis(4-methoxyphenyl)quinoxalin-6-yloxy]phenyl}quinoxaline-6-carboxylic acid (G2) and 2,3-bis[4-(2,3-bis{4-[2,3-bis(4-methoxyphenyl)quinoxalin-6-yloxy]phenyl}quinoxalin-6-yloxy)phenyl]quinoxaline-6-carboxylic acid (G3), were studied using surface pressure–area (Π–
A) isotherms and atomic force microscopy (AFM). Surface pressure–area isotherms show that the limiting area of G2 increased but G3 decreased on the europium ion-containing subphase than on the water subphase. The Langmuir–Blodgett (LB) films of dendrimer–europium ion complexes preserve their original luminescent properties and the packing of further layers does not cause quenching of luminescence.
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Lin Ma, Limei Xu, Xuyao Xu, Xiaoping Zhou, Lingling Zhang
2014 Volume 43 Issue 8 Pages
1306-1308
Published: August 05, 2014
Released on J-STAGE: August 05, 2014
Advance online publication: May 13, 2014
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A facile template-free route has been employed to synthesize well-dispersed novel BiPO
4 six-angular microcolumns with hierarchical architectures. The obtained products were characterized using XRD, EDX, and SEM. The experimental results indicate that the BiPO
4 six-angular microcolumns are assembled by numerous nanoparticles in an oriented way. Additionally, the different solvent ratios have a significant influence on the morphology and crystal phase of the final products.
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Satoru Ito, Satoru Hiroto, Hiroshi Shinokubo
2014 Volume 43 Issue 8 Pages
1309-1311
Published: August 05, 2014
Released on J-STAGE: August 05, 2014
Advance online publication: May 14, 2014
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Supplementary material
We have developed a facile procedure for the synthesis of π-extended fluorubins from perylene bisimides. Iridium-catalyzed direct borylation, the Suzuki–Miyaura cross-coupling, and an acid-condensation sequence afforded π-extended fluorubins
1 in moderate yields. X-ray diffraction analysis revealed a planar structure of
1. In addition, optical analysis and DFT calculations indicated the presence of intramolecular charge-transfer interactions in
1c.
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Yanfei Wang, Wenjie Xu, Qiongfang Zhuo, Zhencheng Xu, Qingwei Guo
2014 Volume 43 Issue 8 Pages
1312-1314
Published: August 05, 2014
Released on J-STAGE: August 05, 2014
Advance online publication: May 14, 2014
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Recovery of cadmium in wastewater was investigated by an electrochemical deposition approach in a multianode and multicathode cell in this study. The effects of initial concentration, initial pH, current density, and complexing agents on the recovery of cadmium were examined. Acidic media was found to improve the recovery efficiency. When the current density was 4.46 mA cm
−2, the mass was almost increased to be maximum after electrochemical deposition for 90 min. With further increase in current density, little increase of recovery ratio was observed. Presence of aqueous ammonia increased the deposition rate. X-ray diffraction (XRD) analysis demonstrated that the deposits were composed of cadmium and cadmium hydroxide.
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