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测定了以荧光素为光敏剂的电子给体-受体二元化合物荧光素蒽醌甲酯(FL- AQ)及模型化合物荧光素丁酯(FL4)在溶液中和在二氧化钛(TiO_2)胶体中的吸 收光谱、荧光光谱、荧光寿命等。发现荧光素蒽醌甲酯与荧光素丁酯均可通过酚羟 基较好地吸附在TiO_2胶体上。从吸收光谱可得,FL4与TiO_2形成表面络合物的表 观结合常数(K_(app))大约为3590 mol~(-1)·L,结合率(α)为0.86;FL-AQ与 TiO_2形成表面络合物的K_(app)大约为3060 mol~(-1)·L,α为0.84。同时通过 ESR光谱讨论了光诱导电子注入机制。 相似文献
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A new type of high efficiency light emitting alternating copolymer with hole transport and conjugated aromatic units has been designed and synthesized. The chemical structures of the six copolymers are shown in Scheme 1. 相似文献
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Yun-Qi Liu Dao-Ben Zhu Li-Ke Ruan Chun-Li Bai Akira Yamada Kiyotaka Shigehara 《中国化学》1991,9(2):126-130
Three different kinds of rare-earth metal phthalocyanine complexes (Pc2LuH, Pc3Gd2, R12 Pc3Dy2) were synthesized. Their ultra-thin films were prepared by the Langmuir-Blodgett technique. Crystallites were observed in Langmuir film of Pc3Gd2 by means of transmission electron microscopy. The limiting molecular areas of the phthalocyanine derivatives on pure water increased in the order mono-, di- and triphthalocyanine, implying that these phthalocyanine molecules are stacked with a face-to-face orientation and edge-on to the water surface. By using scanning tunneling microscopy individual molecules of lutetium diphthalocyanine adsorbed on graphite surfaces were imaged for the first time. 相似文献
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为了得到具有高的临界转变温度的有机超导体,我们设计并合成了新的有机电子给体Twin—ET 和[2,2]-ET—Phane。并对 Twin-ET 的性质进行了研究。 相似文献
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The non-uniform chain manganese(III) complex constructed from EE-azido bridged MnIII3O units, [MnIII3O(Brppz)3-(MeOH)3(N3)] 2MeOH [1, Brppz = 3-(5-bromo-2-phenolate)-pyrazolate], is the first example of 1D azido-bridged coordination polymer showing both solvatomagnetic effect and spin-glass behavior. 相似文献
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导电性的电荷转移复合物(盐)由于其特殊的物理性质和潜在的应用前景,近年来得到广泛研究[1,2].导电电荷转移复合物主要包括基于M(dmit)2(dmit=1,3-二硫-2-硫酮-4,5-二硫醇盐)阴离子自由基[3~5]和BEDT-TTF(乙二硫撑四硫... 相似文献
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合成了以荧光素为光敏剂的电子给体-受体二元化合物荧光素蒽醌甲酯(FL-AQ),用吸收光谱、荧光光谱、荧光寿命研究了该化合物在乙醇溶液中的光物理性质,并首次用纳秒级瞬态吸收光谱检测了此化合物分子内光诱导电子转移所形成的电荷分离态.在溶液中激发FL,电子可从FL有效地转移到AQ,其速率常数为3.95×109s-1,效率为95%.但由于电荷分离态寿命较短,瞬态吸收信号弱,若在此溶液中加入二氧化钛(TiO2)纳米胶体,使FL-AQ吸附在胶体上,电荷分离态信号明显增强.480nm处FL+·的寿命为11.1μs;560nm处AQ-·的寿命为8.93μs. 相似文献