-
Suzhi Li, Yuanyuan Guo, Xiaoyang Qiu, Jingping Wang, Jingyang Niu
2012 Volume 41 Issue 9 Pages
847-849
Published: September 05, 2012
Released on J-STAGE: August 11, 2012
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Supplementary material
A novel sodium germanomolybdate compound [Na
6(H
2O)
12][H
2Ge
2Mo
6O
26] (
1) has been successfully synthesized by conventional solution method. The structure was determined by single-crystal X-ray diffraction analysis and further characterized by IR and UV spectroscopy and X-ray powder diffraction (XRPD). X-ray structural analysis reveals that
1 crystallizes in triclinic space group
P1, with lattice constants
a = 8.466(4) Å,
b = 10.290(4) Å,
c = 11.159(5) Å, α = 72.305(6)°, β = 71.115(6)°, γ = 76.969(5)°,
V = 867.5(6) Å, and
Z = 1, which consists of a novel polyoxoanion [H
2Ge
2Mo
6O
26]
6− and a [Na
6(H
2O)
12]
6+ cluster. Furthermore, the dimeric polyoxoanion units link alternate [Na
6(H
2O)
12]
6+ clusters to generate a 3D framework.
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Masashi Yoshinaga, Norihito Kijima, Sonoko Wakahara, Junji Akimoto
2012 Volume 41 Issue 9 Pages
850-852
Published: September 05, 2012
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Ultrafine SnO
2 nanoparticles were successfully synthesized by microwave heating. The SnO
2 nanoparticles worked as a rechargeable electrode material for a lithium-ion battery. Micro-Raman spectroscopy, X-ray diffraction, and cyclic voltammetry studies of the SnO
2 nanoparticles elucidated that the lithium insertion–deinsertion reactions during the 1st cycle were caused by both redox of SnO
2 and Li–Sn alloying–dealloying reactions. The redox reactions were irreversible and disappeared via charge–discharge cycling, and only the Li–Sn alloying–dealloying reactions took place at the later cycle.
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Erika Ido, Kenji Kakiage, Toru Kyomen, Minoru Hanaya
2012 Volume 41 Issue 9 Pages
853-854
Published: September 05, 2012
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Chemical surface modifications of Al
2O
3, TiO
2, and SiO
2 by using diphenylsilane bearing hydrosilyl moieties were investigated by IR spectroscopy and gas chromatography. The hydrosilane was observed to adsorb on the metal oxide surfaces by forming Si–O–metal bonds with generation of hydrogen gas. The results show that hydrosilanes can be used as chemical surface modifiers such as the usual silane coupling agents of silanols, chlorosilanes, and alkoxysilanes.
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Katsuya Unesaki, Masahiko Hashimoto, Kazuhiko Tsukagoshi
2012 Volume 41 Issue 9 Pages
855-856
Published: September 05, 2012
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An open-tubular capillary chromatography system has been developed using a ternary mixed solvent mixture, i.e., water–hydrophilic/hydrophobic organic solvent mixture as a carrier solution. In this study, the influence of adding surfactants to an analyte solution on separation performance was examined in a chromatographic system using a fused-silica capillary tube (75 µm inner diameter and 100 cm effective length) and a ternary mixture of water–acetonitrile–ethyl acetate (3:8:4 volume ratio) carrier solution. Sodium dodecyl sulfate (anionic), ethylhexadecyldimethylammonium bromide (cationic), and Triton X-100 (nonionic) were used as surfactants. Model analytes, 1-naphthol and 2,6-naphthalenedisulfonic acid, were separated in this order by adding the anionic and nonionic surfactants. These surfactants in the analyte solution greatly improved the separation performance (theoretical plate numbers for 2,6-naphthalenedisulfonic acid; >10000) compared with the same separation performed in the absence of surfactants. On the other hand, the analytes were not separated at all using a cationic surfactant.
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Hoik Lee, Donghyun Kim, Daewon Sohn
2012 Volume 41 Issue 9 Pages
857-859
Published: September 05, 2012
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This study examines the direct preparation of poly(acrylic acid) (PAA) on a silicon wafer modified by γ-ray radiation. Using this innovative method, we synthesized PAA on a silicon wafer without additive material because the silicon-wafer itself acts as an initiator. The reaction time was adjusted to control the thickness of PAA on the silicon wafer.
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Minoru Kubo, Orio Okuyama, Teizo Kitagawa, Yasuteru Shigeta
2012 Volume 41 Issue 9 Pages
860-862
Published: September 05, 2012
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Supplementary material
Normal vibrational modes of heme have been analyzed using density functional theory, to assign a new Raman band observed at 312 cm
−1 in the CO-bound, active form of soluble guanylate cyclase. The conserved YxSxR motif is incorporated into the model to reproduce the hydrogen-bonding network around propionates. A delocalized mode that involves Arg motions as well as pyrrole tilting and propionate bending is found to be the most likely candidate accounting for the new band.
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Shyamaprosad Goswami, Krishnendu Aich, Debabrata Sen
2012 Volume 41 Issue 9 Pages
863-865
Published: September 05, 2012
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Supplementary material
A new acridine fluoroionophore derivative bearing lithium salt of thioglycolate, is designed and synthesized. Its fluorescence sensing behavior toward metal ions has been investigated in absolutely aqueous media (HEPES buffer solution, pH 7.4). It displayed a selective CHEF (chelation-enhanced fluorescence) effect toward Cd
2+ in presence of other heavy and transiton-metal ions. Highly sensitive
switching on response of the fluorophore toward Cd
2+, facilitates it suitable for sensing of Cd
2+ in aqueous media.
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Xiongjie Jin, Kazuya Yamaguchi, Noritaka Mizuno
2012 Volume 41 Issue 9 Pages
866-867
Published: September 05, 2012
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Supplementary material
An atom-efficient and green synthetic route to highly valuable imides (54–92% yields) from terminal alkynes and amides has been developed. This new route is composed of two consecutive reactions, that is, (i) the reported Cu(OH)
2-catalyzed cross-coupling of terminal alkynes and amides to ynamides and (ii) the Sn–W mixed oxide-catalyzed regioselective hydration of ynamides.
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Jianfang Wang, Liping Kang, Zhikui Su, Youliang Ren
2012 Volume 41 Issue 9 Pages
868-870
Published: September 05, 2012
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A novel pillaring procedure without alkylamine or tetraalkylammonium pretreatment has been developed to prepare SiO
2/TiO
2 pillared layered manganese oxide with large surface area. SiO
2/TiO
2 pillared layered manganese oxide is prepared by solvothermal treating H-type layered manganese oxide at 220 °C for 12 h in a mixed solution of absolute ethanol, tetraethylorthosilicate, and titanium isopropoxide. The obtained SiO
2/TiO
2 pillared layered manganese oxide is expected to be a selective catalyst or an improved battery material.
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Shiyong Sun, Joseph T. Y. Wong, Faqin Dong, Mingxue Liu
2012 Volume 41 Issue 9 Pages
874-876
Published: September 05, 2012
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Supplementary material
From prokaryotes to eukaryotes, the DNA condensation process by basic proteins is essential to store the genome in vivo. The surface charge inversion with a DNA/HCcp3 charge ratio of 0.7/1 indicates a role for HCcp3-mediated counter ion-driven mechanism in DNA condensation. The formation of the cholesteric liquid-crystalline phase of DNA–HCcp3 complexes occurred when DNA charges were neutralized. The results suggest that DNA condensation processes by HCcp3 can be divided into two distinctive binding stages: the first state, prior to condensation, involves an entropy-driven binding process of HCcp3 to the DNA, while the second state is an electrostatically driven condensing and assembling process.
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Daiki Ito, Yukiko Takahashi, Hironobu Saito, Yoshio Nosaka
2012 Volume 41 Issue 9 Pages
877-879
Published: September 05, 2012
Released on J-STAGE: August 18, 2012
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A simple and easily controllable immobilization method for photosensitizer dyes and the resulting photosensitizer dye nanoparticle-coated membranes (PDNMs) that generate singlet oxygen (
1O
2) under atmospheric conditions were demonstrated. A 100% porphyrin nanoparticles layer that is less than 1 µm thick on a membrane filter caused quantitative
1O
2 production under illumination. The thin layer promotes effective light absorption as well as significantly slowed deactivation of
1O
2 by supporting materials. Moreover, the PDNMs were highly resistant to photobleaching of dye itself.
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Akihiko Tsuge, Katsuji Nakamura, Tetsuji Moriguchi, Koji Araki
2012 Volume 41 Issue 9 Pages
880-882
Published: September 05, 2012
Released on J-STAGE: August 18, 2012
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Supplementary material
Cyclophanes consisting of diethylene glycol-substituted oligothiophene units as a component have been synthesized. Formation of pseudorotaxane arising from complexation of the cyclophanes and the cyclobis(paraquat-
p-phenylene) (CBPQT
4+) has been confirmed. It has also been discovered that conformational properties of the cyclophanes are strongly affected by the formation of pseudorotaxane.
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Ying Chang, Shijie Dong, Huihu Wang, Kuanhe Du
2012 Volume 41 Issue 9 Pages
883-885
Published: September 05, 2012
Released on J-STAGE: August 25, 2012
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Spherical reunion powders composed of tetragonal and cubic phase ZrO
2 have been prepared for the first time via a coupling route of w/o (water in oil) emulsion with dimethyl oxalate homogenous precipitation. The as-prepared ZrO
2 microspheres and the precursor powders were analyzed and characterized by TG-DTA, XRD, and SEM. The formation mechanism of these powders is discussed in detail. Experimental results indicate that the coupling route may accomplish the one-step synthesis of ZrO
2 microspheres possessing well-rounded spherical shape and narrow size distribution, which consists of closely attached nanoparticles, the microspheres are approximately 5–10 µm in size.
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Akitoshi Hayashi, Takuya Matsuyama, Atsushi Sakuda, Masahiro Tatsumisa ...
2012 Volume 41 Issue 9 Pages
886-888
Published: September 05, 2012
Released on J-STAGE: August 25, 2012
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Amorphous TiS
3 active materials were prepared using a high-energy ball mill and first applied to all-solid-state cells with Li
2S–P
2S
5 solid electrolyte. The solid-state cell operated as a rechargeable lithium battery with a high capacity of 400 mA h g
−1 at room temperature. The cell exhibited a higher capacity than a solid-electrolyte cell with crystalline TiS
2 and showed better cyclability than a liquid-electrolyte cell with crystalline TiS
3.
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Shinya Tanahashi, Takahiko Moteki, Tatsuya Okubo
2012 Volume 41 Issue 9 Pages
889-891
Published: September 05, 2012
Released on J-STAGE: August 25, 2012
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We found that AlPO-5 crystals can be synthesized at relatively low temperature (120 °C) by hydrothermal reaction. The critical requirement was the adjustment of the gel composition to control the crystallization rates of aluminophosphate phases. The obtained products showed almost the same pore characteristics compared with the reference products synthesized at high temperature.
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Kenji Kakiage, Takashi Tsukahara, Toru Kyomen, Masafumi Unno, Minoru H ...
2012 Volume 41 Issue 9 Pages
895-896
Published: September 05, 2012
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The applicability of 4-trimethylsilylpyridine (4TMSpy) was investigated as an organic additive to the electrolyte solution of dye-sensitized solar cells. The N3-sensitized solar cell with 4TMSpy showed higher light-to-electric energy conversion efficiencies than that with the ordinary organic additive of 4-
tert-butylpyridine by a factor of ca. 1.1. This improvement of the photovoltaic performance was considered to be due to the bulkiness and peculiar electronic properties of the trimethylsilyl group.
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Wei Wang, Yuan Wang, Ying Liu, Tielong Li
2012 Volume 41 Issue 9 Pages
897-899
Published: September 05, 2012
Released on J-STAGE: August 25, 2012
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Intelligent polymer was extendedly applied to fabricate a novel environmentally responsive Fenton catalyst in this study. The obtained magnetite/sodium carboxymethyl cellulose-
graft-poly(acrylic acid) (Fe
3O
4/CMC-
g-PAA) nanocomposites showed perfect superparamagnetism, pH response, and superior catalytic activity. In a wide range of pH (3–9), the highly swollen polymer coating not only favored the dispersion of Fe
3O
4 nanoparticles and protected them from leaching but also promoted interface mass transfer with large amounts of hydrophilic ingredients.
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Choji Fukuhara, Tomohiro Yamada, Hiromichi Ohkura, Ryo Watanabe
2012 Volume 41 Issue 9 Pages
900-901
Published: September 05, 2012
Released on J-STAGE: August 25, 2012
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In the low-temperature water–gas shift reaction, the effect of the catalyst pretreatment conditions on the adsorption state of CO was investigated on a structured copper-based catalyst, which was prepared by electroless plating. The amount of CO adsorbed on the catalyst was higher due to the oxidation pretreatment than that by the reduction treatment. The CO adsorbed on the oxidized catalyst formed many carbonate and carboxylate species, which have a slightly weak adsorption. Such an adsorption state would enhance shift performance.
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Marvin U. Herrera, Takashi Ichii, Kuniaki Murase, Hiroyuki Sugimura
2012 Volume 41 Issue 9 Pages
902-904
Published: September 05, 2012
Released on J-STAGE: August 25, 2012
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Methyl-terminated Si(111) surface was successfully fabricated using a photochemical grafting technique. This methylated surface was formed by illuminating visible light onto a hydrogen-terminated Si(111) surface that was immersed in a Grignard–tetrahydrofuran solution. It had an oxide-inhibiting property and atomically flat surface. In addition, the water contact angle improved with grafting parameters such as illumination time and light intensity and went as high as (89.0 ± 0.80)°. This improvement was associated with the increase in the fraction of the silicon surface grafted with methyl groups.
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Takashi Hirahara, Masahiro Yoshizawa-Fujita, Yuko Takeoka, Masahiro Ri ...
2012 Volume 41 Issue 9 Pages
905-907
Published: September 05, 2012
Released on J-STAGE: August 25, 2012
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Supplementary material
A chiral polyfluorene–thiophene derivative incorporating two different chiral side chains was synthesized via the Suzuki coupling reaction. Upon photoexcitation, thin films of the polymer exhibited efficient circularly polarized luminescence in the visible range, even without thermal annealing. The dissymmetry factor,
glum, of films with thicknesses less than 100 nm reached 0.2 at 505 nm.
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Yuki Nakamura, Kazuya Nakazawa, Keita Hamasaki
2012 Volume 41 Issue 9 Pages
908-909
Published: September 05, 2012
Released on J-STAGE: August 25, 2012
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Short peptides with or without host–guest-bridges on their side chains were prepared and the helix content was examined in the absence or in the presence of the host–guest-bridge breaker. While a short peptide without host–guest-bridge had 14% helix content, a short peptide with host–guest-bridge had 40% helix. This helix content hardly changed after the host–guest-bridge was removed. Host–guest-bridge acts as an initiator for helix folding in the short peptide.
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Jidong Wang, Jizu Zhai, Shumin Han
2012 Volume 41 Issue 9 Pages
910-912
Published: September 05, 2012
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A facile synthetic strategy to prepare single-sized colloidal CdTe assemblies with bright band gap emission is described in this letter. In contrast to traditional approaches, the preparation of trioctylphosphine telluride (TOPTe) was not required for this synthesis, and our approach follows a one-step reaction. The CdTe magic-sized quantum dot (MSQD) assemblies were sequentially grown in this approach, and the thermodynamic equilibrium of CdTe MSQDs sequential growth was proposed.
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Megumi Konno, Masafumi Chiba, Koji Nemoto, Tetsutaro Hattori
2012 Volume 41 Issue 9 Pages
913-914
Published: September 05, 2012
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The Friedel–Crafts-type carboxylation of arenes has been achieved by activating CO
2 with silylium borates. The reaction exhibits broader substrate applicability than does our previously reported AlX
3/R
3SiX-mediated carboxylation.
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Hiroaki Ozaki, Yasuhisa Hagiwara, Masayasu Kuwahara
2012 Volume 41 Issue 9 Pages
917-919
Published: September 05, 2012
Released on J-STAGE: September 01, 2012
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Supplementary material
Acridone is an attractive fluorescent molecule for use in DNA probes. Sensing molecule, which has acridone as a signaling moiety and DNA aptamer as a recognition moiety, was prepared by postsynthetic modification method. The fluorescence of this sensing molecule changed depending on the DNA structure and
L-argininamide could be detected by this molecule. This strategy could provide a quencher-free aptamer beacon.
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Neeraj Kumar, Sanny Verma, Suman L. Jain
2012 Volume 41 Issue 9 Pages
920-922
Published: September 05, 2012
Released on J-STAGE: September 01, 2012
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Thiourea dioxide in water was found to be an efficient and reusable organocatalytic system for the one-pot synthesis of polyhydroquinoline derivatives via the Hantzsch-type coupling of aldehyde, dimedone, acetoacetate, and ammonium acetate under mild reaction conditions. Operational simplicity, the use of an economically affordable catalyst, environmentally benign conditions, high product yields, and reusability of the catalyst system were the advantageous features of the developed method.
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Cha Wen Chang, Yuta Nabae, Shigeki Kuroki, Teruaki Hayakawa, Masa-aki ...
2012 Volume 41 Issue 9 Pages
923-925
Published: September 05, 2012
Released on J-STAGE: September 01, 2012
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Supplementary material
A new compound,
B,
B′,
B′′-tris(4-hydroxyphenyl)-
N,
N′,
N′′-triphenylborazine (BZ) was prepared as a precursor for carbon-based oxygen reduction catalysts. The mixtures of BZ and phenolic resin were pyrolyzed under N
2 at 1000 °C for 5 h and resulted in a carbonaceous material with high oxygen and boron contents. The oxygen reduction catalytic activity was much improved by the addition of this precursor. The improved catalytic activity is probably due to the oxygen-containing functionalities that are enriched in the presence of boron species.
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Naoki Nishida, Yasuhiro Kojima, Hideki Tanaka
2012 Volume 41 Issue 9 Pages
926-928
Published: September 05, 2012
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Supplementary material
Chiral Ag:SG (glutathione) triangular nanoplates were synthesized by substitution reaction of achiral Ag:poly(vinylpyrrolidone) (PVP) nanoplates with glutathione free GSH molecules. Analysis of the chiroptical properties of the synthesized nanoplates using a circular dichroism spectrometer revealed characteristic Cotton effects with wavelengths that corresponded well to those of plasmon resonances for Ag nanoplates. X-ray photoelectron spectrometry analysis of their chemical compositions revealed that complete substitution of PVP molecules with GSH molecules proceeds on the nanoplates.
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Takayuki Hanamura, Eriko Uchida, Yutaka Ishiguro, Takeshi Koizumi, Mic ...
2012 Volume 41 Issue 9 Pages
929-931
Published: September 05, 2012
Released on J-STAGE: September 01, 2012
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We examined the
13C/
12C and
18O/
16O stable isotope ratios (δ
13C, δ
18O) of ascorbic acid from acerola and of synthetic origin. Although the obtained δ
13C values were partially overlapping for the two species, δ
18O values were higher for ascorbic acid from acerola, than values obtained for synthetic ascorbic acid. From this study, it was demonstrated that carbon and oxygen isotopic composition analysis can discriminate ascorbic acid from acerola from that of synthetic origin.
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Atsushi Inoue, Satoshi Minakami, Takami Kanno, Kazuharu Suyama
2012 Volume 41 Issue 9 Pages
932-933
Published: September 05, 2012
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Supplementary material
A crosslinked poly(allylamine) was prepared by copolymerization of allylammonium dihydrogen phosphate with
N,
N′-diallyl-1,3-diaminopropane bis(dihydrogen phosphate). This polymer has both a high phosphate adsorption capacity and a low degree of swelling. Thus, the polymer should be useful as a therapeutic agent for hyperphosphatemia, and compared with sevelamer hydrochloride, should have fewer side effects such as constipation.
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Korefumi Kubota, Shuzo Hirata, Yuki Shibano, Osamu Hirata, Masayuki Ya ...
2012 Volume 41 Issue 9 Pages
934-936
Published: September 05, 2012
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Supplementary material
We report efficient carrier injection characteristics in liquid organic light-emitting diodes (OLEDs). The use of a liquid carbazole substituted with a poly(ethylene oxide) (PEO) chain provided a substantial improvement in carrier injection compared to devices constructed with carbazoles without PEO units. The external electroluminescence quantum efficiency (Φ
EL) of an OLED with the liquid carbazole as an emitting layer resulted in Φ
EL = 0.75%, 25 times higher Φ
EL than that of our previous liquid OLED without electrolyte.
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Kyosuke Isoda, Masaharu Nakamura, Toshinori Tatenuma, Hironori Ogata, ...
2012 Volume 41 Issue 9 Pages
937-939
Published: September 05, 2012
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Supplementary material
Oligoacenes are of interest as organic p-type semiconductors for use in electronic devices, but their use as n-type semiconductors is limited.
N-Heteroacenes have been investigated as oligoacene-based n-type semiconductors due to their enhanced electron affinity. Herein, we report the synthesis, X-ray crystal structures, electrochemical, and field-effect transistor properties of TANC and BTANC.
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Liyan Fan, Wen Chen, Kunshan Tang, Dongbei Wu
2012 Volume 41 Issue 9 Pages
940-942
Published: September 05, 2012
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Supplementary material
PhI(OAc)
2-mediated dehydrogenation of α-alkyl-β-dicarbonyl compound has been developed to afford α-ylidene-β-dicarbonyl compounds with high stereoselectivity under mild conditions. This process provides a complementary entry to stereoselectivity for the Knoevenagel reaction.
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Jinhui Lin, Hui Dan, Yi Ding
2012 Volume 41 Issue 9 Pages
943-944
Published: September 05, 2012
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High-purity spherical silica nanoparticles have been successfully synthesized using powder quartz as silica sources in an improved sol–gel method. The effects of the modulus (molar ratio SiO
2/Na
2O) of sodium silicate and poly(ethylene glycol) (PEG) on the properties of silica nanoparticles were investigated. The results suggested that with the increase of modulus, the purity of silica nanoparticles increased. The higher purity (99.92 wt %) products can be obtained from the modulus of 3. Moreover, it was also found that the particle size, distribution, and dispersion significantly depend on the concentration of PEG. The silica nanoparticles with average size of 60 nm are well-dispersed and show a narrow size distribution when the PEG concentration is 2 wt %. The results suggest that it is feasible to prepare high-purity spherical silica nanoparticles using powder quartz as silica sources.
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Carmen Froschauer, Herbert Sixta, Hedda K. Weber, Gerhard Laus, Volker ...
2012 Volume 41 Issue 9 Pages
945-946
Published: September 05, 2012
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Supplementary material
In the search for new ionic liquids (ILs) for biomass processing, analytical chemistry, or modern nonvolatile fire retarding agents, alkyl phosphonate-based ILs represent very promising candidates. A very practical synthesis of such ILs, which is superior to the conventional quaternization of 1-alkylimidazoles by dimethyl phosphite (DMP), was developed. 1,3-Dialkylimidazolium halide salts serve as convenient starting materials, and various 1,3-dialkylimidazolium methyl phosphonates are thus accessible by simple, fast, and solvent-free procedures with DMP, where the anion is methylated.
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Kazu Okumura, Soichiro Ishida, Yoshitaka Kinoshita, Takashi Sanada, Ke ...
2012 Volume 41 Issue 9 Pages
947-949
Published: September 05, 2012
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Supplementary material
Mesoporous solid acid catalyst composed of Nb–Mo oxide was prepared via a hydrothermal synthesis employing ammonium niobium oxalate and hexaammonium heptamolybdate tetrahydrate as the precursors. The assembly of fine particles with diameters of 20–34 nm was observed by field emission–scanning electron microscopy. The Nb–Mo oxide has mesopores with diameters of 1.6–2.0 nm. It was possible to tune size of the primary particles and diameter of the mesopores by changing Mo/Nb ratio. The Nb–Mo oxide exhibited high activity in Friedel–Crafts alkylation.
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Akio Kamimura, Tomomi Nokubi, Kotaro Nasu, Yasuko Takechi, Yuriko Ishi ...
2012 Volume 41 Issue 9 Pages
950-951
Published: September 05, 2012
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Supplementary material
Quinone dimers are readily prepared quantitatively from 2-sulfanyl-1,4-dimethoxybenzene by oxidative treatment. The oxidative coupling progressed in a highly regioselective manner. Removal of O-protection and subsequent oxidation gave 5,5′-bis(sulfanylquinone) dimer in good yields. Physical properties of the dimer derivatives are also investigated.
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Yoshimune Nonomura, Tomoya Tanaka
2012 Volume 41 Issue 9 Pages
952-953
Published: September 05, 2012
Released on J-STAGE: September 01, 2012
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Supplementary material
We observed the condensation of water and ethanol on a hydrophobic polymer film coated with fluorinated silicone particles and identified five states: the circular droplet, ellipsoidal droplet, network, huge droplet, and film states. The shape of the condensed droplets changed with the particle density and the wettability of the particles by the liquid.
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Manami Kanemaru, Kazuya Yamamoto, Jun-ichi Kadokawa
2012 Volume 41 Issue 9 Pages
954-956
Published: September 05, 2012
Released on J-STAGE: September 01, 2012
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Supplementary material
In this study, we synthesized a new trehalose-based amphiphile, 6,6′-di-
O-octyltrehalose, from trehalose by five reaction steps. The SEM and TEM images of the sample prepared by drying its aqueous dispersion showed the formation of morphologically controlled hollow rod nanoaggregates.
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Hayato Tsuji, Kazutaka Shoyama, Eiichi Nakamura
2012 Volume 41 Issue 9 Pages
957-959
Published: September 05, 2012
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Supplementary material
We have synthesized diphenyl-substituted anthra[2,3-
b:6,7-
b′]difuran, a furan analogue of pentacene, together with its isomers, anthra[2,1-
b:6,5-
b′]difuran and anthra[1,2-
b:5,6-
b′]difuran. These compounds are stable in the solid state with high decomposition temperatures. They are luminescent in the solid state with a quantum yield of 0.093–0.23.
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Tomoya Tanaka, Hiroyuki Mayama, Yoshimune Nonomura
2012 Volume 41 Issue 9 Pages
960-961
Published: September 05, 2012
Released on J-STAGE: September 01, 2012
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Supplementary material
We successfully determined the three-dimensional structure of agar gel droplets on multipillared surfaces. The contact angle, length of penetration of the agar gel into the interspace between pillars, and curvature of the bottom surface of the droplets were changed with respect to changes in the volume and concentration of the aqueous agar solution and the distance between the surface-bound pillars.
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Yuki Hamasaki, Naotoshi Nakashima, Yasuro Niidome
2012 Volume 41 Issue 9 Pages
962-964
Published: September 05, 2012
Released on J-STAGE: September 08, 2012
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Supplementary material
Electrochemical reactions of silver in the presence of chloride and bromide ions were examined using cyclic voltammetry (CV) and electrochemical quartz-crystal microbalance measurements. In the presence of chloride ions, repeated CV cycles caused AgCl to deposit on the electrode. In contrast, reduction of silver ions in the presence of bromide ions to form metallic silver was very slow, and AgBr was not deposited on the gold electrode.
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Satoshi Sato, Daisuke Sakai, Fumiya Sato, Yasuhiro Yamada
2012 Volume 41 Issue 9 Pages
965-966
Published: September 05, 2012
Released on J-STAGE: September 08, 2012
JOURNAL
OPEN ACCESS
Supplementary material
Silica-supported silver exhibited high catalytic activity in the dehydration of glycerol: glycerol was dehydrated into hydroxyacetone with the selectivity higher than 86% at 91% conversion over Ag/SiO
2 in H
2 flow at 240 °C. Silver metal provides an active site and showed stable catalytic activity for the glycerol dehydration in H
2 atmosphere, while the dehydration activity decreased in N
2 atmosphere. The hydrogenation of hydroxyacetone into 1,2-propanediol and the decomposition to ethylene glycol did not proceed over silver.
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Jun Takaya, Shuhei Nakamura, Nobuharu Iwasawa
2012 Volume 41 Issue 9 Pages
967-969
Published: September 05, 2012
Released on J-STAGE: September 08, 2012
JOURNAL
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Supplementary material
An efficient method for the synthesis of tridentate PGeP– and PSnP–palladium complexes is developed. Structural analysis revealed that PSiP-ligand exerts the strongest trans influence and electron donation and that PGeP- and PSnP-ligands provide wider coordination sphere around the palladium. Preliminary studies demonstrated that both PGeP– and PSnP–palladium complexes work as an efficient catalyst for reductive aldol-type reaction, indicating promising utility in synthetic organic chemistry.
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Jianan Zhang, Jizhi Lin, Bo Wu, Beibei Yang, Mingyuan Wu, Wenlong Yang ...
2012 Volume 41 Issue 9 Pages
970-971
Published: September 05, 2012
Released on J-STAGE: September 08, 2012
JOURNAL
RESTRICTED ACCESS
Supplementary material
Hybrid hollow microspheres have been fabricated successfully via miniemulsion polymerization using the in situ formed and modified nanosilica particles as Pickering emulsifier. The hydrolysis and condensation reactions of tetraethoxysilane (TEOS) take place to form nanosilica particles which are then partially modified by oil-soluble 3-(trimethoxysilyl)propyl methacrylate (MPS) at the oil/water interface under basic conditions. After the miniemulsification process, Pickering miniemulsions were stabilized by the in situ nanosilica particles. Hybrid hollow microspheres are obtained with silica nanoparticles closely packed on the surface of polymer microspheres. The results showed that both the weight ratios of TEOS/styrene and MPS/TEOS have great effects on the production of stable Pickering emulsion and then the morphologies of the obtained hybrid microspheres.
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