Journal issue
Volume 39
, Issue 1
Showing 1-31 articles out of 31 articles from the selected issue
- |<
- <
- 1
- >
- >|
Highlight Review
-
Yasuhito Koyama, Kazuko Nakazono, Hideki Hayashi, Toshikazu Tataka2010 Volume 39 Issue 1 Pages 2-9
Published: January 05, 2010
Released: December 05, 2009
JOURNALS RESTRICTED ACCESSThe present review summarizes the prominent properties, in particular, the unique optical properties, generated by 9,9-diarylfluorene moiety introduced into polymer main chains in addition to the synthesis of polymers containing diarylfluorene moieties on the basis of results of the studies reported mainly in this decade. Polymers usually show both high refractive index and low birefringence besides many other physical and chemical properties. This review focuses not only on the polymers but also the composite materials, and discloses excellent polymer materials. In addition, synthesis and properties of novel related monomers and their corresponding polymers are also described.
View full abstract -
Tatsuya Nabeshima, Shigehisa Akine, Chusaku Ikeda, Masaki Yamamura2010 Volume 39 Issue 1 Pages 10-16
Published: January 05, 2010
Released: December 12, 2009
JOURNALS RESTRICTED ACCESSPseudomacrocyclic compounds with 2,2′-bipyridine subunits and multimetal-assisting functional molecules with salamo and dipyrrin moieties as the N2O2 ligation moieties are described. The unique and suitable arrangement of these ligation units results in highly synergistic functions in the metallo-supramolecular systems.
View full abstract
Letter
-
Kazuhiro Sayama, Nini Wang, Yugo Miseki, Hitoshi Kusama, Nobuko Onozaw ...2010 Volume 39 Issue 1 Pages 17-19
Published: January 05, 2010
Released: December 05, 2009
JOURNALS RESTRICTED ACCESSCarbonate ions in the aqueous electrolyte solution improved both the photocurrent and the stability of a porous BiVO4 semiconductor electrode used for water splitting under visible light up to 520 nm. The photocurrents in AHCO3 (A = Na and K) solutions at 1.23 V were approximately six times higher than that in Na2SO4 aqueous solution. The maximum incident photon-to-current efficiency (IPCE) was 45% at 420 nm without any surface modifications.View full abstract -
Sujing Li, Yunqian Wei, Jianguo Huang2010 Volume 39 Issue 1 Pages 20-21
Published: January 05, 2010
Released: November 28, 2009
JOURNALS RESTRICTED ACCESSSuperhydrophobic cellulosic materials with remarkable self-cleaning ability and satisfactory long-term chemical stability were fabricated by depositing self-assembled silane monolayer onto ultrathin titania film precoated nanofibers of natural cellulosic substances without altering the initial material structures and morphologies.View full abstract -
Hisashi Shimakoshi, Masashi Nishi, Akihiro Tanaka, Katsumi Chikama, Yo ...2010 Volume 39 Issue 1 Pages 22-23
Published: January 05, 2010
Released: December 05, 2009
JOURNALS RESTRICTED ACCESSA vitamin B12 derivative was immobilized on a core–shell hyperbranched polymer, and the hybrid polymer was characterized by GPC, UV–vis, IR as well as TEM analyses. The hybrid polymer exhibits catalysis for the dehalogenation of phenethyl bromide to form ethylbenzene and 2,3-diphenylbutane by irradiation with UV light at room temperature.View full abstract -
Hajime Iwamoto, Yukimi Yawata, Yoshimasa Fukazawa, Takeharu Haino2010 Volume 39 Issue 1 Pages 24-25
Published: January 05, 2010
Released: December 05, 2009
JOURNALS RESTRICTED ACCESSThe tether-assisted synthesis of [3]rotaxane by olefin metathesis is described. The bis(crown ether)s, in which two crown ethers are connected by a linker, were converted to tethered rotaxanes, followed by removal of the linkers to produce [3]rotaxane. The biscrown structures promoted the formation of the tethered rotaxane, resulting in a notable improvement in the yield of the [3]rotaxane.View full abstract -
Shouichi Somekawa, Leny Yuliati, Asako Ishikawa, Kazuhiro Takanabe, Ka ...2010 Volume 39 Issue 1 Pages 26-27
Published: January 05, 2010
Released: December 05, 2009
JOURNALS RESTRICTED ACCESSHigh surface area Co3O4–CeO2 catalysts were prepared by the simple calcination of carbonate–precursor mixtures at 300 °C. The Co3O4–CeO2 catalyst with a Co/Ce molar ratio of 1 showed high activity for toluene decomposition, comparable to that of Pt(0.08 wt %)/zeolite catalyst. The total decomposition of toluene was achieved at degradation temperatures as low as 200 °C. The Co3O4–CeO2 catalyst was highly stable, even after two weeks of reaction.View full abstract -
Katsuhiko Kanaizuka, Shoji Iwakiri, Teppei Yamada, Hiroshi Kitagawa2010 Volume 39 Issue 1 Pages 28-29
Published: January 05, 2010
Released: December 05, 2009
JOURNALS RESTRICTED ACCESSA novel coordination polymer of zinc(II) biphenyldicarboxylate bearing a sulfone group, [Zn(sbdc)(H2O)3]·(H2sbdc)·H2O (H2sbdc: sulfone biphenyldicarboxylic acid), has been synthesized. It is composed of a one-dimensional chain structure of alternating Zn(II) cations and sbdc anions. This coordination polymer possesses noncoordinating uncharged acid H2sbdc existing between the chains with hydrogen-bonding networks. The proton conductivity of [Zn(sbdc)(H2O)3]·(H2sbdc)·H2O strongly depended on the relative humidity (RH), being 2.5 × 10−7 S cm−1 at 95% RH. The activation energy for proton conductivity was estimated to be 0.32 eV at 95% RH.View full abstract -
Nikolay O. Mchedlov-Petrossyan, Natalya A. Vodolazkaya, Natalya V. Sal ...2010 Volume 39 Issue 1 Pages 30-31
Published: January 05, 2010
Released: December 05, 2009
JOURNALS RESTRICTED ACCESSFluorescein is exclusively popular owing to bright fluorescence of its R2− dianion. While the structure of the latter and tautomerism of the H2R form are well established, only the species with COO− and OH groups has been supposed for HR− up to now. Using absorption, emission, and excitation at different pH in non-HBD solvents, DMSO, acetonitrile, and acetone, we reveal that 10–12% of HR− ions nevertheless exist as “phenolate” monoanion with nonionized COOH group.View full abstract -
Miwa Murakami, Tadashi Shimizu, Masataka Tansho, Tomoko Akai, Tetsuo Y ...2010 Volume 39 Issue 1 Pages 32-33
Published: January 05, 2010
Released: December 05, 2009
JOURNALS RESTRICTED ACCESSTo study microstructure of Na2O–B2O3–SiO2–Al2O3 glass, which is a starting material for preparing porous glass, 11B one-dimensional (1D) magic-angle spinning (MAS) spectra and results of two-dimensional (2D) 11B–11B homonuclear correlation experiment under MAS are examined at 21.8 T. We conclude that two of the four peaks observed for 11B are assigned to borate rings, which we assign as the main components in the boron-rich phase to be removed by acid leaching.View full abstract -
Hye-Li Jeong, Young-Duk Huh2010 Volume 39 Issue 1 Pages 34-35
Published: January 05, 2010
Released: December 05, 2009
JOURNALS RESTRICTED ACCESSHexagonal needles of BaSiF6 microcrystals have been prepared by using a hydrothermal method with Ba(NO3)2, SiO2, and HF in the presence of NH4Cl or ethylenediamine dihydrochloride as the metal chelating agent. The metal chelating agent plays an important role in controlling the aspect ratios of the BaSiF6 microcrystals. X-ray diffraction was used to confirm that the axes of the hexagonal needles of BaSiF6 are aligned along the c axis.View full abstract
Editor's Choice
-
Sachiko Yanagisawa, Keiko Yotsuya, Yumi Hashiwaki, Masaki Horitani, Hi ...2010 Volume 39 Issue 1 Pages 36-37
Published: January 05, 2010
Released: December 05, 2009
JOURNALS OPEN ACCESSResonance Raman spectroscopy has been applied to two distinct temporal species of indoleamine 2,3-dioxygenase during catalytic turnover. We have identified two oxygen-isotope-sensitive Raman modes at 569 and 798 cm−1 for the two respective species. The 16O18O analysis of the 798 cm−1 band indicates the existence of a ferryl-oxo heme, which is inconsistent with the previously proposed reaction mechanism. The present study thus provides a physical basis for the structures of the possible reaction intermediates.View full abstract
Letter
-
Roberto Lavecchia, Antonio Zuorro2010 Volume 39 Issue 1 Pages 38-39
Published: January 05, 2010
Released: December 05, 2009
JOURNALS RESTRICTED ACCESSTrehalose at 10–30% (w/w) greatly stabilized bovine serum albumin (BSA) against thermal denaturation. The highest stabilization was reached in 30% trehalose at 65 °C, when the protein’s half life was increased from 72 to 335 min. A kinetic analysis based on the Lumry–Eyring mechanism of inactivation showed that BSA denaturation can be described by a first-order rate expression with an apparent activation energy ranging from 238.1 to 246.4 kJ mol−1.View full abstract -
Xin Li, Hong Lin, Yongchang Zhang2010 Volume 39 Issue 1 Pages 40-41
Published: January 05, 2010
Released: December 05, 2009
JOURNALS RESTRICTED ACCESSA new kind of front contact counter electrode with multi-wall carbon nanotube array on a nonconductive substrate and a thin metal layer was designed for dye-sensitized solar cells. Under standard AM 1.5 irradiation (100 mW cm−2), a device with such counter electrode yielded an overall conversion efficiency of 2.53%.View full abstract
Editor's Choice
-
Biocompatible and Highly Sensitive Nitric Oxide Sensor Particles Prepared by Layer-by-layer AssemblySuzuka Amemori, Michiya Matsusaki, Mitsuru Akashi2010 Volume 39 Issue 1 Pages 42-43
Published: January 05, 2010
Released: December 12, 2009
JOURNALS OPEN ACCESSBiocompatible sensor particles with high nitric oxide (NO) sensitivity were fabricated by a combination of layer-by-layer assembly and acid-free chitosan dissolving techniques. The sensor particles encapsulating 4,5-diaminofluorescein (DAF-2), an NO fluorescent probe, can detect 5–500 nM NO and had higher cytocompatibility as compared to DAF-2 molecules. These sensor particles will be useful for quantitative and spatial analyses of extracellular NO molecules from living cells.View full abstract
Letter
-
Preparation and Characterization of a New-type Composite Photocatalyst of 3DOM TiO2/Carbon MaterialsShi Li, Dongfeng Zhao, Jingtang Zheng, Yong Wan2010 Volume 39 Issue 1 Pages 44-45
Published: January 05, 2010
Released: December 12, 2009
JOURNALS RESTRICTED ACCESSIn this paper, a new-type composite photocatalyst of titania/carbon (TiO2/C) with three-dimensional ordered macroporous (3DOM) structure was successfully prepared by combining the macroporous structure of 3DOM carbon and the catalytic properties of TiO2. Under ultraviolet light, the obtained 3DOM TiO2/C materials were used to degrade Methyl Orange solution as simulated organic waste–water and had a high catalytic activity. Furthermore, compared with commercial Degussa p25 catalyst, obtained 3DOM TiO2/C materials displayed an excellent regenerative ability.View full abstract -
Hiroaki Kitahara, Hidehiro Sakurai2010 Volume 39 Issue 1 Pages 46-48
Published: January 05, 2010
Released: December 12, 2009
JOURNALS OPEN ACCESSGold nanoclusters stabilized by the poly(N-vinyl-2-pyrrolidone) hydrophilic polymer (Au:PVP) catalyzed the intramolecular cycloaddition of primary amines to unactivated alkenes in the presence of formic acid derivatives. The reaction proceeded under neutral to slightly acidic conditions in air.View full abstract -
Norifumi Hashimoto, Takayoshi Hara, Shogo Shimazu, Yusuke Takahashi, T ...2010 Volume 39 Issue 1 Pages 49-51
Published: January 05, 2010
Released: December 12, 2009
JOURNALS RESTRICTED ACCESSComplete hydrodechlorination of 1,1,1-trichloro-2,2-bis(4-chlorophenyl)ethane (DDT) and its derivatives 1,1-dichloro-2,2-bis(4-chlorophenyl)ethene (DDE) and 1,1-dichloro-2,2-bis(4-chlorophenyl)ethane (DDD) was achieved using a hydroxyapatite-supported Pd nanoparticle catalyst (Pd0HAP) in the presence of molecular hydrogen under mild reaction conditions. The catalytic activity of Pd0HAP was significantly higher than those of previously reported Pd catalysts.View full abstract -
Hitoshi Furusho, Motoi Oishi, Tetsuo Kishi, Atsuo Yasumori, Yukio Naga ...2010 Volume 39 Issue 1 Pages 52-53
Published: January 05, 2010
Released: December 12, 2009
JOURNALS RESTRICTED ACCESSNovel gold nanoparticles (GNPs) as a SERS probe were prepared using two types of functional PEG/oligoamine polymers possessing biotin as biotag molecules at the PEG end or a coumarin moiety as a Raman probe molecule between the PEG and oligoamine segments. Eventually, the GNPs showed excellent dispersion stability under physiological conditions, as well as remarkable SERS signal resulting from molecular recognition between streptavidin and the biotin tag, even in the presence of bovine serum albumin (BSA).View full abstract -
Zhonghua Wang, Kazuma Yasuhara, Hiroshi Ito, Masaru Mukai, Jun-ichi Ki ...2010 Volume 39 Issue 1 Pages 54-55
Published: January 05, 2010
Released: December 12, 2009
JOURNALS RESTRICTED ACCESSPyranine, a multivalent anionic fluorescent dye, triggered the budding and production of small vesicles from giant vesicles that consisted of zwitterionic and cationic lipids. Calorimetric analysis and microscopic observations revealed that the binding of pyranine induced domain formations of the lipid bilayer followed by membrane fission.View full abstract -
Hiroyuki Tanabe, Takaharu Kawai, Terunobu Saitoh, Junji Ichikawa2010 Volume 39 Issue 1 Pages 56-57
Published: January 05, 2010
Released: December 12, 2009
JOURNALS RESTRICTED ACCESSDicationic species, naphthalene-1,8-diylbis(diphenylmethylium), successfully promoted oxidative arylation of the sulfur atom in (4-N,N-dialkylaminophenyl) phenyl sulfides with (4-N,N-dialkylaminopheny)silanes, affording triarylsulfonium salts in good yield.View full abstract -
Yoshinori Arisaka, Atsushi Tamura, Katsumi Uchida, Hirofumi Yajima2010 Volume 39 Issue 1 Pages 58-59
Published: January 05, 2010
Released: December 12, 2009
JOURNALS RESTRICTED ACCESSAmphiphilic diblock copolymers comprising poly(methyl methacrylate-co-spirobenzopyran methacrylate) and poly(ethylene glycol) were synthesized using atom transfer radical polymerization to develop a new photoresponsive drug carrier. The diblock copolymers formed core–shell polymeric micelles with photoresponsive inner cores. Spirobenzopyran in the core was isomerized to the merocyanine form by UV irradiation, which resulted in reduction of the micellar size without decrease in the association number. This inferred that the strongly intermolecular interactions between merocyanine residues caused the conformational change of the core segments, following reduction of the micellar size.View full abstract -
Ming Lu, Shuichi Nagamatsu, Yuji Yoshida, Masayuki Chikamatsu, Reiko A ...2010 Volume 39 Issue 1 Pages 60-61
Published: January 05, 2010
Released: December 12, 2009
JOURNALS RESTRICTED ACCESSIntroduction of branched alkyl chains at the terminal positions of sexithiophene drastically improves the solubility of the compound, while still maintaining satisfactory charge carrier mobility. Field-effect transistors based on spin-coated films of the sexithiophene derivative exhibited p-type characteristics. Post thermal treatment enhanced crystallinity of the films and afforded a field-effect mobility of 0.11–0.18 cm2 V−1 s−1 and an on/off ratio of 104.View full abstract -
Takashi Nakamura, Masa-aki Ohshima, Hideki Kurokawa, Hiroshi Miura2010 Volume 39 Issue 1 Pages 62-63
Published: January 05, 2010
Released: December 12, 2009
JOURNALS OPEN ACCESSHydrogenation activity of aromatic hydrocarbons was remarkably increased when the residual chlorine on Ru/Al2O3 and Ru/SiO2 was removed by washing. On the basis of FT-IR spectra in the CO region, a site active for hydrogenation reactions was created by removal of the residual chlorine.View full abstract -
Chengyong Li, Xuehua Wang, Gui Chen, Lei He, Hong Cao2010 Volume 39 Issue 1 Pages 64-65
Published: January 05, 2010
Released: December 12, 2009
JOURNALS RESTRICTED ACCESSOrdered Ni/Al2O3 core–shell nanowire arrays were prepared in porous alumina membrane via alternating current electrodeposition and chemical etching methods. The shape of the inner Ni core is columnar with a diameter of 50 nm. The shape of the outer Al2O3 shell is a regular hexagon and the well thickness is about 40 nm. This novel structured material can be used as a media for magnetic storage and high-temperature nanoelectronic devices.View full abstract -
Shuji Kagawa, Hideya Kawasaki, Ryuichi Arakawa2010 Volume 39 Issue 1 Pages 66-67
Published: January 05, 2010
Released: December 12, 2009
JOURNALS RESTRICTED ACCESSThe degradation effects of benzoylferrocene (BF) on poly(ethylene glycol) (PEG) and poly(methyl methacrylate) (PMMA) were investigated using MALDI-MS. It is supposed that the release of free radicals in solution by BF plays a key role in the decomposition of PEG and PMMA. MALDI-MS combined with examination of the degradation by BF could be applied to the analysis of synthetic polymer structures containing the PEG and PMMA chain.View full abstract -
Mana Yamashita, Koji Hirano, Tetsuya Satoh, Masahiro Miura2010 Volume 39 Issue 1 Pages 68-69
Published: January 05, 2010
Released: December 12, 2009
JOURNALS RESTRICTED ACCESSReadily available cinnamic acids possessing a hydroxy group including ferulic acid efficiently undergo direct decarboxylative arylation under palladium catalysis to form hydroxylated stilbenes. The reaction of related acids is also described.View full abstract -
Huibin Qiu, Shunai Che2010 Volume 39 Issue 1 Pages 70-71
Published: January 05, 2010
Released: December 12, 2009
JOURNALS RESTRICTED ACCESSTighter packing of aromatic group-substituted N-acylamino acids in micelles at lower basicity significantly enhances intermolecular steric hindrance between adjacent amphiphiles and helps the formation of chiral mesoporous silica with higher enantiopurtiy.View full abstract -
Toshio Takenaka, Anatoly A. Zinchenko, Kenichi Yoshikawa, Shizuaki Mur ...2010 Volume 39 Issue 1 Pages 72-73
Published: January 05, 2010
Released: December 19, 2009
JOURNALS RESTRICTED ACCESSSilica nanoparticles, the surface of which was modified by a 3-aminopropylsilyl group, compacted gene-size DNA in aqueous solutions in the presence of Na+ or K+. The DNA-compaction efficiency of histone-size (10 nm diameter) nanoparticles is greater than that of large (100 nm) nanoparticles under similar experimental conditions.View full abstract -
S. Ashok Kumar, Sea-Fue Wang, Jen-Chang Yang, Chun-Ting Yeh, His-Chuan ...2010 Volume 39 Issue 1 Pages 74-75
Published: January 05, 2010
Released: December 19, 2009
JOURNALS RESTRICTED ACCESSThis paper describes surfactant-free and template-free synthesis of gold nanorods/nanobelts (Au-NRBs) using ciprofloxacin (CF) as a reducing/stabilizing agent (a fluoroquinolone antibiotic). Synthesized Au-NRBs were stable and easily soluble in water. Scanning electron microscopy, energy-dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM), and UV–visible spectroscopy are used for characterization of synthesized Au-NRBs. Indeed, synthesized Au-NRB-modified electrodes show high electrocatalytic properties toward oxidation of ethanol in alkaline solution (0.1 M NaOH).View full abstract
Additions and Corrections
-
Shuichi Haraguchi, Munenori Numata, Chun Li, Yoko Nakano, Michiya Fuji ...2010 Volume 39 Issue 1 Pages 76
Published: January 05, 2010
Released: January 05, 2010
JOURNALS RESTRICTED ACCESS
- |<
- <
- 1
- >
- >|