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Yuhei Tsukahara, Tohru Wada, Koji Tanaka
2010 Volume 39 Issue 11 Pages
1134-1135
Published: November 05, 2010
Released: September 28, 2010
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Electrochemical reduction of a diazonium complex [Ru(bpy)(trpy-ph-N
2+)(CO)](PF
6)
3 ([
1](PF
6)
3) (bpy = 2,2′-bipyridine, trpy-ph-N
2+ = 4-(2,2′:6′,2′′-terpyridine-4′-yl)benzenediazonium) using a GC electrode forms multilayer films of the complexes on the electrode surface, on which the reduced form of the complex showed strong affinity toward CO
2.
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Yukiumi Kita, Masanori Tachikawa, Neil D. Drummond, Richard J. Needs
2010 Volume 39 Issue 11 Pages
1136-1137
Published: November 05, 2010
Released: September 28, 2010
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A variational Monte Carlo study using inhomogeneous backflow transformations is reported for the [H
−;e
+] and [Li
−;e
+] positronic compounds. The backflow transformations greatly improve the total energies, positron affinities, and two-photon annihilation rates. The Slater–Jastrow-backflow trial wave function is well suited to the theoretical analysis of positronic compounds.
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Satoshi Kojima, Jun-ya Arimura, Kazumasa Kajiyama
2010 Volume 39 Issue 11 Pages
1138-1139
Published: November 05, 2010
Released: September 28, 2010
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A Horner–Wadsworth–Emmons-type 10-P-5 phosphorane reagent bearing bidentate ligands from 1-naphthol was prepared and examined in the olefination of aldehydes.
Z-Selectivity was generally high except for the case of 3-phenylpropanal, and acetophenone was also found to react with relatively high selectivity.
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Peng Wang, Shu-Hua Teng, Fang-Qiong Tang
2010 Volume 39 Issue 11 Pages
1140-1141
Published: November 05, 2010
Released: September 28, 2010
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Mesoporous titania spheres with a high monodispersity were synthesized by employing monodisperse poly(styrene-
co-methacrylic acid) (PSMAA) particles as templates. The titania nanoparticles coated on the PSMAA spheres were first re-dispersed in the mixed solvent and subsequently infiltrated into the swollen PSMAA spheres. After calcinations to remove completely PSMAA, monodisperse mesoporous titania spheres were obtained, displaying an average particle size of about 130 nm and a pore size distribution centered around 4 nm.
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Satoshi Kitaoka, Kaoru Nobuoka, Naoki Yoshiiwa, Thomas Harran, Yuichi ...
2010 Volume 39 Issue 11 Pages
1142-1143
Published: November 05, 2010
Released: September 28, 2010
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We synthesized novel triazolate-based ionic liquids containing two cyano groups. These liquids exhibit lower viscosity and glass transition temperatures than the ionic liquids without cyano groups. The present method of delocalizing anion charges in triazolate-based ionic liquids by means of cyano substitutions may be applicable to other ionic liquids to reduce their viscosity, thus making them promising reactive media and electrolytes.
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Guojie Wang, Mingzhi Zhang, Qiang Yang, Fang Liu, Zihui Cheng, Renwei ...
2010 Volume 39 Issue 11 Pages
1144-1145
Published: November 05, 2010
Released: September 28, 2010
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The liquid crystalline states of mixtures of smectic 4-octyl-4′-cyanobiphenyl, chiral binaphthyl-diol, and a photochromic azobenzene derivative, 4-
n-hexyl-4′-(1-bromopropyloxy)azobenzene, are dependant on the chiral dopant and azobenzene concentrations. The trans-to-cis isomerization of azobenzene induces the phase transition from smectic to cholesteric and then to isotropic states.
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Josaku Kiyota, Junpei Yokoyama, Masaki Yoshida, Shigeyuki Masaoka, Ken ...
2010 Volume 39 Issue 11 Pages
1146-1148
Published: November 05, 2010
Released: September 28, 2010
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An ITO (indium tin oxide) electrode modified with [Ru(terpy){4,4′-(CH
2PO
3H
2)
2-2,2′-bpy}(OH
2)]
2+ was prepared to gain insight into the mechanism of O
2 evolution from water catalyzed by a series of mononuclear aquaruthenium complexes, such as [Ru(terpy)(bpy)(OH
2)]
2+. The modified ITO electrode showed a clear decrease in overpotential for O
2 evolution (1.35 V in an aqueous 0.1 M Na
2SO
4/H
2SO
4 solution, pH 4.0), indicating that the O
2 evolution proceeds in a unimolecular fashion without having any intermolecular associations.
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Madhav Bandaru, Narayana Murthy Sabbavarpu, Ramesh Katla, Venkata Durg ...
2010 Volume 39 Issue 11 Pages
1149-1151
Published: November 05, 2010
Released: October 05, 2010
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MnCl
2·4H
2O is described as an efficient catalytic system for the cross coupling of aryl/vinyl halides with thiols using KOH as base and DMSO as solvent. By using this new catalytic system various aryl/vinyl sulfides were synthesized in moderate to good yields. Retention of stereochemistry is observed in the case of vinyl sulfides.
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Yuichi Makita, Shinobu Uemura, Nagayoshi Miyanari, Takaaki Kotegawa, S ...
2010 Volume 39 Issue 11 Pages
1152-1154
Published: November 05, 2010
Released: October 05, 2010
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Dynamic solution structure of a three-phase interface (oil/water/solid) of a bicontinuous microemulsion (BME) was evaluated electrochemically with apparent diffusion coefficients (
Dapp’s) from cyclic voltammograms. With hydrophilic (ITO) and lipophilic (pyrolytic graphite) electrodes,
Dapp’s were much smaller than with an amphiphilic (Au) electrode. The
Dapp ratios of ITO:PG-b in the BME were larger than those in a homogeneous aqueous solution. These results indicate that BME solution structures around hydrophilic and lipophilic electrodes adopt alternately layered structures but not simple sloped structures.
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Akihiko Tsuge, Toshiyuki Kunimune, Yutaka Ikeda, Tetsuji Moriguchi, Ko ...
2010 Volume 39 Issue 11 Pages
1155-1157
Published: November 05, 2010
Released: October 05, 2010
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Calixarene-based porphyrins in which the calixarene scaffold is connected with porphyrin units by an alkyl chain as a spacer have been prepared. Porphyrin with ethano bridge exhibits extremely high affinity (10
9 M
−1) for diazabicyclo[2.2.2]octane (DABCO).
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Gejihu De, Menggenqilavuqi Yu, Siqin Bao
2010 Volume 39 Issue 11 Pages
1158-1159
Published: November 05, 2010
Released: October 05, 2010
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β-NaGd
0.794Yb
0.20Ho
0.001Tm
0.005F
4 nanoparticles were synthesized through a simple hydrothermal method. The nanoparticles crystallized well and exhibited nearly hexagonal morphology and ellipsoidal spheres, as characterized by X-ray powder diffraction and transmission electron microscopy. The β-NaGd
0.794Yb
0.20Ho
0.001Tm
0.005F
4 nanoparticles have an average size of about 23 nm. Room-temperature bright white upconversion luminescence in β-NaGd
0.794Yb
0.20Ho
0.001Tm
0.005F
4 nanoparticles was obtained under single-wavelength diode laser excitation of 980 nm.
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Seyoung Yoon, Insik In
2010 Volume 39 Issue 11 Pages
1160-1161
Published: November 05, 2010
Released: October 05, 2010
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Solubilization of reduced graphene is simply attempted through in situ reduction of graphene oxide (GO) solution in the presence of poly(propylene imine) dendrimers
G4 or
G5 with terminal amine groups through noncovalent interaction. Interestingly, porous graphene film was formed by filtration of these dendrimer-stabilized reduced graphene solutions.
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Michinari Kohri, Jun Matsui, Akira Watanabe, Tokuji Miyashita
2010 Volume 39 Issue 11 Pages
1162-1163
Published: November 05, 2010
Released: October 05, 2010
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An organic–inorganic hybrid amorphous molecular material; carbazole-substituted double-decker-shaped silsesquioxane (DDSQ-4Cz) was synthesized, and an organic light-emitting diode was fabricated using the spin-coated DDSQ-4Cz film as a hole transport layer.
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Kwangwoo Nam, Rie Fukaya, Yoshihide Hashimoto, Yukiko Ito, Tsuyoshi Ki ...
2010 Volume 39 Issue 11 Pages
1164-1165
Published: November 05, 2010
Released: October 05, 2010
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The graft density of poly[poly(ethylene glycol) methacrylate] (PPEGMA) was controlled using atom transfer radical polymerization to observe the change in the differentiation behavior of stem cells because the alteration in the graft density leads to the altered surface elasticity. However, since the cells do not adhere on the high graft density polymer brush, it is impossible to observe such behavior directly. We therefore immobilized collagen onto polymer brushs with controlled graft density to obtain a surface which is effective for cell adhesion and maintains its different surface matrix elasticity. For the cell adhesion, the human mesenchymal stem cell (hMSC) adhesion and differentiation was investigated on the surface of collagen-immobilized polymer brush. It was shown that the hMSC spreading tendency was altered by the surface elasticity implying that the behavior of hMSC would be altered by the stiffness of the polymer brush.
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Masataka Kondo, Takuya Kochi, Mitsuo Sato, Aki Kitajima, Fumitoshi Kak ...
2010 Volume 39 Issue 11 Pages
1166-1167
Published: November 05, 2010
Released: October 05, 2010
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Solution-phase assembly of a Rh complex using specific hydrogen bonding between BA and TAP moieties was achieved by tuning the substituent on TAP to control the solubility of the assembly.
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Minghui Deng, Shuqing Huang, Quanxin Zhang, Dongmei Li, Yanhong Luo, Q ...
2010 Volume 39 Issue 11 Pages
1168-1170
Published: November 05, 2010
Released: October 09, 2010
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Cu
2S-based counter electrodes screen-printed on different substrates for CdS/CdSe quantum-dot-sensitized solar cells are reported. The photovoltaic conversion efficiency of 3.71% was obtained with Cu
2S counter electrode deposited on conductive substrate due to low charge-transfer resistance. By addition of conductive carbon material, a cell with Cu
2S/C composite counter electrode screen-printed on insulated glass substrate displayed an efficiency of 3.37%. These results showed the potential application of such Cu
2S-based counter electrode for large-scale quantum-dot-sensitized solar cells in the future.
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Yutaka Kuwahara, Daigou Mizoguchi, Keishiro Yoshimori, Hiroaki Endo, M ...
2010 Volume 39 Issue 11 Pages
1171-1173
Published: November 05, 2010
Released: October 09, 2010
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We have observed novel formation of differently shaped three-dimensional aggregates among hydrophobic gold nanospheres, nanorods, and nanobones. Gold nanobones preferentially formed spherical assemblies of 100-nm scale. In the case of gold nanorods, the shapes of assemblies were profoundly affected by the aspect ratios, changing from spherical to bundle-like structure.
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Akihiro Nishiguchi, Hiroaki Yoshida, Michiya Matsusaki, Mitsuru Akashi
2010 Volume 39 Issue 11 Pages
1184-1185
Published: November 05, 2010
Released: October 16, 2010
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Reduction-sensitive nanogels with a large swelling capacity were successfully prepared by the crosslinking reaction of biodegradable polymers in water, followed by the insolubilization of the polymers with the gradual addition of ethanol. The obtained nanogels were ca. 200–300 nm in diameter, and had a high water content, over 99%. Moreover, these nanogels were easily decomposed by the cleavage of the disulfide crosslinkages to their thiol groups using a reductant. These biocompatible and biodegradable nanogels prepared without toxic surfactants will be useful as novel carriers for drug delivery systems.
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Jinxi Chen, Susumu Kitagawa
2010 Volume 39 Issue 11 Pages
1186-1187
Published: November 05, 2010
Released: October 16, 2010
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A 2-dimensional (2D) noninterpenetrated flexible porous coordination polymer, [Cu(HBTC)(4,4′-bpy)]·C
6H
11OH·H
2O (
1), has been synthesized and characterized using single-crystal X-ray diffraction. The cyclohexanol guest molecules in
1 can be removed upon soaking
1 in ethanol. Complex
1 undergoes a single-crystal transformation to form an ethanol solvate, [Cu(HBTC)(4,4′-bpy)(H
2O)]·C
2H
5OH·2H
2O (
2), and during the process, the octahedral coordination of the copper cation in
1 converts to square-pyramidal coordination in
2.
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Yuya Egawa, Yoshiyuki Tanaka, Ryota Gotoh, Satoshi Niina, Yu Kojima, N ...
2010 Volume 39 Issue 11 Pages
1188-1189
Published: November 05, 2010
Released: October 16, 2010
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Nitrogen-15 NMR spectroscopy showed strongly upfield values of the chemical shift for one of the azo nitrogen atoms of a boronic-acid-appended azo dye: this indicated the formation of a boron–nitrogen (B–N) dative bond. The B–N dative bond was cleaved by sugar addition.
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Joo Hee Jang, Insik In
2010 Volume 39 Issue 11 Pages
1190-1191
Published: November 05, 2010
Released: October 16, 2010
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Thermosensitive membrane is prepared by surface-initiated atom-transfer radical polymerization of
N-isopropylacrylamide (NIPAM) from initiator-attached anodized aluminum oxide (AAO) membrane to formulate smart membrane which can control mass transport through membrane by temperature control. PNIPAM-grafted AAO membrane with partially open pores shows accelerated water transport on heating above lower critical solution temperature (LCST). Pore widening effect might suppress increased hydrophobicity of PNIPAM brush on the pores of AAO membrane above LCST.
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Maiko Yamaguchi, Takeshi Hirakawa, Naoko Nishina, Mitsuru Kondo, Hirom ...
2010 Volume 39 Issue 11 Pages
1192-1193
Published: November 05, 2010
Released: October 16, 2010
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A self-assembled Cu–bitb molecular capsule system using basic copper(II) carbonate as a Cu
2+ source removed perchlorate and tetrafluoroborate anions from aqueous solutions without contamination by Cu(II) ion.
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Junzhi Liu, Yuzhi Yan, Zhihua Chen, Yi Gu, Xikui Liu
2010 Volume 39 Issue 11 Pages
1194-1196
Published: November 05, 2010
Released: October 16, 2010
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We present our preliminary work on the fabrication of polyimide hollow sphere by reprecipitation. Through fine-tuning the PAA concentration, many intriguing shapes, including deflated capsules, bowl-shaped and dimple-like hollow spheres can be obtained. Adding salt to the PAA solution helps the formation of PI hollow spheres with complete shells. The morphologies can be fixed through imidization, thus obtaining a controllable and reproducible method to prepare high-performance polyimide hollow spheres with various morphologies.
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Kui Shen, Xueguang Wang, Xinxing Wang, Xiujing Zou, Xionggang Lu, Weiz ...
2010 Volume 39 Issue 11 Pages
1197-1199
Published: November 05, 2010
Released: October 16, 2010
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Mg–Al mixed oxide supported Ni catalysts were significantly more active than other catalysts so far reported for the pre-reforming of liquefied petroleum gas, in which LPG was completely pre-reformed to methane, carbon oxides, and hydrogen under high space velocity with low steam/carbon ratio of 2.0.
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Manirul Islam, Paramita Mondal, Kazi Tuhina, Dildar Hossain, Anupam Si ...
2010 Volume 39 Issue 11 Pages
1200-1202
Published: November 05, 2010
Released: October 16, 2010
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A new polystyrene-anchored palladium(II) catalyst has been prepared and characterized by conventional spectroscopic methods and elemental analyses. The catalyst was found to be highly effective for the Suzuki cross-coupling reactions of aryl halides with arylboronic acid in water medium under phosphine-free reaction conditions. The optimal reaction conditions of the coupling were determined. The present heterogeneous Pd(II) catalyst was reusable as well as air-stable to allow easy use.
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Zhen Zhou, Genin Gary Huang, Yukihiro Ozaki
2010 Volume 39 Issue 11 Pages
1203-1205
Published: November 05, 2010
Released: October 20, 2010
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A novel heat-induced SERS method was used to selectively enhance a band of NO
3− at 1049 cm
−1 for semi-quantitative detection of lysozyme and insulin down to 10
−9 and 10
−8 M, respectively, and bell shape variations of SERS intensities were observed for the concentration dependency of the proteins.
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Toshiyuki Kida, Koichiro Kishimoto, Koji Hatano, Masahiro Muraoka, Yoh ...
2010 Volume 39 Issue 11 Pages
1206-1208
Published: November 05, 2010
Released: October 20, 2010
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Acetylated cyclodextrins (CDs), including peracetylated α- and β-CDs as well as 2,3-
O-diacetylated α- and β-CDs, were found to function as organogelators for organic solvents such as benzene, toluene, and xylenes at ambient temperature. Their organogelation capability was strongly affected by both the CD ring size and the degree of acetylation. Peracetylated α-CD showed the highest organogelation capability among these acetylated CDs, possibly due to the effective construction of three-dimensional networks by the pillar-like assemblies in the organic solvents.
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Tomoya Sato, Yoshifumi Amamoto, Hiroki Yamaguchi, Hideyuki Otsuka, Ats ...
2010 Volume 39 Issue 11 Pages
1209-1211
Published: November 05, 2010
Released: October 20, 2010
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A reactive polymer brush containing alkoxyamine units in the side chains, when heated with an alkoxyamine-terminated fluorinated nongrafted polymer, gave a grafted copolymer brush by a radical crossover reaction of alkoxyamine units. The fluorinated grafted copolymer brush could be converted back to the parent polymer brush upon treatment with an excess of low-molecular alkoxyamine. The reversible change in the surface properties of the brush was confirmed by X-ray photoelectron spectroscopy and contact angle measurements.
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Hou Qun Yuan, Asako Igashira-Kamiyama, Takumi Konno
2010 Volume 39 Issue 11 Pages
1212-1214
Published: November 05, 2010
Released: October 20, 2010
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Treatment of the Λ
LLLΛ
LLL and Δ
LLLΔ
LLL isomers of K
3[Co{Co(
L-cys-
N,
S)
3}
2] (K
3[
1],
L-cys:
L-cysteinate) with Ln(NO
3)
3 (Ln = La and Yb) in water gave coordination polymers, Λ
LLLΛ
LLL-Ln[
1] and Δ
LLLΔ
LLL-Ln[
1], respectively, in which [
1]
3− binds to Ln
3+ through carboxylate groups in a 1:1 ratio. It was found that the dimensional structures of Ln[
1] are controlled not only by the diastereoisomerism of [
1]
3− (Λ
LLLΛ
LLL vs. Δ
LLLΔ
LLL) but also by the ionic size of Ln
3+ (La
3+ vs. Yb
3+).
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Kei Inumaru, Shintaro Kakii, Hiroto Yoshida, Shoji Yamanaka
2010 Volume 39 Issue 11 Pages
1215-1217
Published: November 05, 2010
Released: October 20, 2010
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In situ
13C CP-MAS NMR measurements enabled for the first time detection of the presence and absence of water liquid phase in nanospaces of alkyl-grafted mesoporous silicas through the signals of alkyl chains, when the materials were immersed in water. It was revealed that
n-octyl-grafted mesoporous silica excluded liquid water from the hydrophobic nanospaces at least in an hour time scale while liquid water penetrated into
n-pentyl-grafted material much faster. This is important for understanding the adsorbents in the working states in water.
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Fuyuki Ito, Ryuichi Ohta, Yukie Yokota, Kosei Ueno, Hiroaki Misawa, To ...
2010 Volume 39 Issue 11 Pages
1218-1219
Published: November 05, 2010
Released: October 20, 2010
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Fluorescence intensity of near infrared dyes immobilized in hydrophobic DNA thin film spin-coated on glass substrates with regularly arranged gold (Au) nanoblocks was about 2.5 times larger than that without Au nanoblocks, strongly suggesting the fluorescence intensity was enhanced by increased electric field intensity of excitation light due to local plasmon resonance of Au nanoblocks.
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Jun-ya Kohno, Tamotsu Kondow
2010 Volume 39 Issue 11 Pages
1220-1221
Published: November 05, 2010
Released: October 20, 2010
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We describe a novel method to trap biomolecular ions in the gas phase produced by an IR-laser ablation of a droplet beam. The IR-laser ablation is performed in an ion trap so that the product ions are readily trapped with high efficiency. The ions are thermalized in collisions with the ambient water molecules which are simultaneously produced with the ions by the IR-laser ablation.
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Poopathy Kathirgamanathan, Sivagnanasundram Surendrakumar, Seenivasaga ...
2010 Volume 39 Issue 11 Pages
1222-1224
Published: November 05, 2010
Released: October 20, 2010
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A series of novel arylvinyl-substituted phenanthroline derivatives have been synthesized and their applications as electron-transporting materials in organic light-emitting diodes (OLED’s) have been investigated. One particular derivative, namely, 2,9-bis(2-thiophen-2-ylvinyl)[1,10]phenanthroline shows significantly lower operating voltage than tris(8-quinolinolato)aluminum(III) (Alq
3) and substantially higher lifetime than bathophenanthroline (BPhen).
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