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81.
Poompat Rattanatraicharoen Yoko Tanaka Keiko Shintaku Takuro Kawaguchi Kazuhiro Yamabuki Tsutomu Oishi Kenjiro Onimura 《Journal of polymer science. Part A, Polymer chemistry》2013,51(6):1315-1322
Optically active poly(m‐phenylene)s substituted with chiral oxazoline derivatives have been synthesized by the nickel‐catalyzed Yamamoto coupling reaction of optically active (S)‐4‐benzyl‐2‐(3,5‐dihalidephenyl)oxazoline derivatives (X = Br or I). The structures and chiroptical properties of the polymers were characterized by spectroscopic methods and thermal gravimetric analyses. The polymers showed higher absolute optical specific rotation values than their corresponding monomer, and showed a Cotton effect at transition region of conjugated main chain. The optical activities of the polymers should be attributed to the higher order structure such as helical conformations. Moreover, the helical conformation could be induced by addition of metal salts into polymer solutions. The polymers showed good thermal stabilities, which was attributable to the oxazoline side chains. © 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2013 相似文献
82.
Akane Agui Hiroshi Sakurai Takuro Tamura Toshitaka Kurachi Masahito Tanaka Hiromichi Adachi Hiroshi Kawata 《Journal of synchrotron radiation》2010,17(3):321-324
An application of magnetic Compton scattering as a new tool to measure a spin‐specific magnetic hysteresis (SSMH) loop is introduced and its validity demonstrated. The applied magnetic field dependence of the integrated intensity of magnetic Compton scattering spectra, which reflect only the spin‐dependent magnetic properties of magnetically active electrons, was interpreted as the spin‐specific hysteresis. The spin magnetization of amorphous Tb33Co67 film was observed and its SSMH loop exhibited qualitative agreement with the ordinal magnetic hysteresis loop measured using a conventional vibrating sample magnetometer. 相似文献
83.
Takuro Abe Masahiko Yoshinaga 《Proceedings of the American Mathematical Society》2008,136(6):1887-1891
We give a criterion for a reflexive sheaf to split into a direct sum of line bundles.
84.
Dr. Takashi Matsuo Kazuki Fukumoto Takuro Watanabe Prof. Dr. Takashi Hayashi 《化学:亚洲杂志》2011,6(9):2182-2182
85.
Makoto Yoshimoto Chihiro Iida Asuka Kariya Noriyuki Takaki Masaharu Nakayama 《Electroanalysis》2010,22(6):653-659
Glucose oxidase (GOD) was encapsulated in liposomes, and then the GOD‐containing liposomes were immobilized to a MnO2‐based multilayered nanocomposite film grown electrochemically. Oxidation of glucose took place on the encapsulated GOD in the manganese oxide film, and the generated H2O2 molecules were oxidized catalytically at high valent Mn sites (4+) in the film. Anodic currents due to reoxidation of the reduced Mn ions (3+) were in proportion to the concentration of glucose from 19.6 to 107.1 mM. Such a simple construction of biosensor is applicable to a variety of combinations of liposomal enzymes and substrates. 相似文献
86.
Takuro Fukunaga 《Discrete Mathematics》2012,312(15):2349-2355
87.
88.
Yamaura K Huang Q Zhang L Takada K Baba Y Nagai T Matsui Y Kosuda K Takayama-Muromachi E 《Journal of the American Chemical Society》2006,128(29):9448-9456
A new form of LiMn2O4 is reported. The structure is the CaFe2O4-type and 6% denser than the spinel. The structure transformation was achieved by heating at 6 GPa. Analysis of the neutron diffraction pattern confirmed an average of the structure; the unit cell was orthorhombic at a = 8.8336(5) angstroms, b = 2.83387(18) angstroms, and c = 10.6535(7) angstroms (Pnma). Electron diffraction patterns indicated an order of superstructure 3a x b x c, which might be initiated by Li vacancies. The exact composition is estimated at Li(0.92)Mn2O4 from the structure analysis and quantity of intercalated Li. The polycrystalline CaFe2O4-type compound showed semiconducting-like characters over the studied range above 5 K. The activation energy was reduced to approximately 0.27 eV from approximately 0.40 eV at the spinel form, suggesting a possible enhancement of hopping mobility. Magnetic and specific-heat data indicated a magnetically glassy transition at approximately 10 K. As the CaFe2O4-type transition was observed for the mineral MgAl2O4, hence the new form of the lithium manganese oxide would provide valuable opportunities to study not only the magnetism of strongly correlated electrons but also the thermodynamics of the phase transition in the mantle. 相似文献
89.
90.
Panagiota Fragouli Hermis Iatrou Nikos Hadjichristidis Takuro Sakurai Yosuke Matsunaga Akira Hirao 《Journal of polymer science. Part A, Polymer chemistry》2006,44(22):6587-6599
A series of novel four‐arm A2B2 and A2BC and five‐arm A2B2C miktoarm star polymers, where A is poly(dimethylsiloxane) (PDMS), B is polystyrene (PS), and C is polyisoprene (PI), were successfully synthesized by the combination of chlorosilane and benzyl chloride linking chemistry. This new and general methodology is based on the linking reaction of in‐chain benzyl chloride functionalized poly(dimethylsiloxane) (icBnCl–PDMS) with the in‐chain diphenylalkyl (icD) living centers of PS‐DLi‐PS, PS‐DLi‐PI, or (PS)2‐DLi‐PI. icBnCl–PDMS was synthesized by the selective reaction of lithium PDMS enolate (PDMSOLi) with the chlorosilane groups of dichloro[2‐(chloromethylphenyl)ethyl]methylsilane, leaving the benzyl chloride group intact. The icD living polymers, characterized by the low basicity of DLi to avoid side reactions with PDMS, were prepared by the reaction of the corresponding living chains with the appropriate chloro/bromo derivatives of diphenylethylene, followed by a reaction with BuLi or the living polymer. The combined molecular characterization results of size exclusion chromatography, 1H NMR, and right‐angle laser light scattering revealed a high degree of structural and compositional homogeneity in all miktoarm stars prepared. The power of this general approach was demonstrated by the synthesis of a morphologically interesting complex miktoarm star polymer composed of two triblock terpolymer (PS‐b‐PI‐b‐PDMS) and two diblock copolymer (PS‐b‐PI) arms. © 2006 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 44: 6587–6599, 2006 相似文献