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41.
Mitsuhiro Yoshimatsu Takashi Asahi Hiroshi Shimizu Tadashi Kataoka 《Heteroatom Chemistry》1995,6(3):259-264
Reactions of tris(methylsenleno)borane-SnCl4 with alkenes 1a–g gave α,β-bis(methylseleno)alkanes 2a –g, stereospecifically, and reactions with 1,3-dienes 1i–k afforded α,β-bis(methylseleno)alk-2-enes 2i–k , regioselectively. 相似文献
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43.
Taku Matsuo Hiroshi Nakamura Hiroshi Sakaguchi Kouji Shimomura Isamu Yoshimatsu Keisuke Takuma 《Molecular Crystals and Liquid Crystals》2013,570(2):185-196
Remarkable electric field effects were observed with sensitized fluorescence intensities of a perylene derivative (BPDC), when rectangular AC waves (up to 10 V0-p ) were applied to nematic liquid crystal cells containing a sensitizer (C307 or AHDA) and an acceptor (BPDC) as the guest molecules. Measurements of the fluorescence lifetime of AHDA indicated that the rates of energy transfer from AHDA to BPDC were independent of the electric fields. The electric field effects completely changed the sign when the intensity variation detected at vertical direction was compared with that at the horizontal direction with respect to the liquid crystal cell. The observed electric field effects on the sensitized fluorescence were consequently suggested to come from the orientation control of transition dipole moment of BPDC through the molecular alignment of the liquid crystal. The suggestion was confirmed by the measurement of dichroic absorption of the donor-acceptor systems. 相似文献
44.
F. F. Tisdall A. R. Ling J. H. Bushill A. C. Alport K. Ohmi L. Condorelli J. S. Sharpe K. Myrbäck R. V. Stanford A. H. M. Wheatley A. Mirkin S. J. Druskin W. Mestrezat R. Fabre Détrois K. Blühdorn Grete Genck A. Hirth A. Klotz G. de Toni P. Ronaund H. Kleinmann Leonia Kriss F. Lebermann B. Kramer Shun-Ichi Yoshimatsu C. H. Fiske G. Litarczek D. Olmer L. Payan J. Berthier und I. Gittleman 《Fresenius' Journal of Analytical Chemistry》1928,74(3-4):151-160
Ohne Zusammenfassung 相似文献
45.
Yoshimatsu K Ye L Stenlund P Chronakis IS 《Chemical communications (Cambridge, England)》2008,(17):2022-2024
A simple electrospinning method is developed to introduce signal transduction ability into molecularly imprinted nanofibers. 相似文献
46.
利用官能团反应活化能的差异, 通过控制反应温度和时间制备了一种具有双交联网络结构的钛酸钡/聚芳醚酮纳米复合膜(BT-BCB/c-DPAEK). 对比研究纯聚合物薄膜及未经交联处理和仅进行单交联处理的复合薄膜发现, BT-BCB/c-DPAEK具有更加优异的力学性能和热性能, 并且其介电性能表现出良好的频率稳定性和温度稳定性. 由于双交联网络对于复合材料两相间界面的改善及高温下对聚合物分子链运动的限制, BT-BCB/c-DPAEK表现出十分优异的储能性能, 特别是在150 ℃, 300 MV/m场强下依然保持1.75 J/cm3的储能密度和80%的放电效率. 相似文献
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Bis(exocyclic)dienes were prepared by the reaction of 2,3-dibromomethyl-1,3-butadiene with aromatic diamines. The diamines were 4,4′-methylene dianiline, 4,4′-oxy dianiline, benzidine, and α, α′-bis(4-aminophenyl)-p-isopropyl benzene (EPON HPT 1061). Polymers were synthesized by the Diels–Alder reaction of these bisdienes with bis(4-maleimidylphenyl) methane. Flexible films were obtained for diene: dienophile ratios ranging from 0.7 : 1 to 0.8 : 1. Films were found to be insoluble in organic solvents and those cured above 120°C were insoluble in concentrated sulfuric acid. The polymers were characterized by IR, TGA, and elemental analysis. 相似文献
49.
Reactions of alpha-tellanyl-beta-ethoxyvinyl lithiums of aldehydes and ketones proceeded in good to high yields and the successive treatment with acids gave the alpha-tellanyl alpha,beta-unsaturated aldehydes. alpha-Tellanyl alpha,beta-unsaturated aldehydes easily transformed to more useful compounds. 相似文献
50.
The direct lithiation and alkylation of beta-sulfur-alpha-trifluoromethyl substituted enol ethers 1-3 proceeded to give the alkylated products 4a-f, 5, 6a-c in moderate to high yields. 相似文献