聚苯乙烯对酞菁铜颜料微胶囊化的研究

自１９５４年美国首先将微胶囊化应用于无碳复写纸后［１,２］,这项技术在药物、农药、食品及染料等方面已得到广泛应用［３］．微胶囊（ＭＣ）直径通常是１～５０００μｍ,构造分为囊壁和囊芯两部分［４］．囊壁材料大多使用高分子材料,少数用无机物［５］．有机颜料...     

聚甲基丙烯酸甲酯型高分子染料的合成

高分子染料的合成研究起于６０年代初［１］．１９７３年，Ｍａｒｅｃｈａｌ等实现了无色高分子材料与有色染料分子的化学键合［２～３］．目前，高分子染料已广泛应用于化妆品、涂料、填料、食品等领域并开始探索在液晶显示、半导体材料、激光记录、非线性光学材料、亲和...     

4-[2-(4-N,N-二甲基苯胺基)乙烯基]吡啶氧化物的电化学行为

半菁染料是人们制造ＬＢ膜的材料之一．近年来,为得到电导率较高的薄膜,电荷转移络合物的ＬＢ膜受到重视［１］．实验证明,有机材料的ＬＢ膜经化学修饰或改性以后,电导率大大增加．化学工作者常将有机染料分子用来修饰电极,在光电化学、电催化等方面有较好的效果,因而,受到人们极大的关注．化学工作者已成功地制备出许多染料化学修饰电极,研究膜修饰电极的电化学行为［２,３］,而用循环伏安法和光谱技术对有机染料的电化学行为研究得较少［４,５］．本文对４ ［２ (４ Ｎ,Ｎ 二甲基苯胺基 )乙烯基］吡啶氧化物这个新改性的半菁化…     

N,2-二芳基二氮亚烯甲酰胺合成的新方法

偶氮化合物可用作非线性光学材料、激光盘信息存贮材料和现代科技中的油溶性染料［１］．传统偶氮化合物的制备有重氮盐偶合和取代肼氧化等许多方法［２～４］,其偶氮基两端一般联有烃基或芳环,而联有羰基的偶氮类化合物用通常方法难以制备．本文首次用Ｎ－溴代丁二酰亚...     

苝环结构修饰的丙烯酰胺聚合物的合成及性质

近年来，红基元结构作为功能材料引起人们的广泛注意［１，２］，我们选择部分红颜料研究了其用于静电复印的光电性能取得了较好的结果［３～６］．但其难溶性阻碍了对它的进一步研究和应用，为此力图合成了红染料修饰的丙烯酰胺聚合物，该化合物溶解性、成膜性、加工性...     

单晶硅表面键合两种甲川菁及其光谱响应的研究

单晶硅表面键合两种甲川菁及其光谱响应的研究王兰英，郝纪祥，张祖训，曹子祥（西北大学化学系，西安，７１００６９）（西北大学电子科学系）关键词光敏染料，单晶硅表面，光谱响应半导体表面化学键合光敏染料的研究是当今化学与材料科学研究的前沿课题之一［１］，近年...     

Nb-MCM-41硅基中孔分子筛的合成与表征

ＭＣＭ４１中孔分子筛在催化、吸附分离、离子交换以及无机材料等领域具有较高的工程应用与研究价值．近年来,在催化应用方面,将具有一定催化活性的过渡金属元素如Ｔｉ［１］、Ｚｒ［２］、Ｍｏ［３］、Ｖ［４］、Ｆｅ［５］、Ｍｎ［６］、Ｗ［７］等以高分散的形态嵌入分子筛骨架结构中,得到了许多具有催化氧化性能的新型催化剂．这些新型催化剂已在石油加工、精细化学品和有机中间体的制备等方面显示出良好的应用前景［８］．铌的化合物是目前引人注目的一种新型催化材料,因为具有酸活性中心及氧化还原功能,已应用于烯烃齐聚［９］…     

含碲唑杂环部花青的合成

含碲唑杂环部花青的合成罗学红，刘秀芳，徐汉生（武汉大学化学系，４３００７２）部花青（又称份菁，ｍｅｒｏｃｙａｎｉｎｅｓ）是一类重要的功能染料。它不仅可以作为感蓝或感绿的光谱增感剂应用于照相化学领域￣［１］，也可作为光盘染料用于其它信息记录￣［２］。这...     

对硝基二苯胺的一个新制法

对硝基二苯胺的一个新制法韦长梅，周建峰（淮阴师范专科学校化学系，江苏省２２３００１）对硝基二苯胺（ｐ－Ｎｉｔｒｏｄｉｐｈｅｎｙｌａｍｉｎｅ）是重要的有机试剂和合成中间体，可用作橡胶稳定剂和染料中间体［１］、合成抗乙酰胆碱能的抑制剂和溃疡抑制剂［２］。...     

金属氧化物/聚(N,N-二甲基苯胺)界面相互作用的ESR研究

共轭聚合物在电、光、磁等方面有很大的应用价值［１～３］,利用其研制各种实用性电子器件时,往往会涉及到它与其它材料尤其是无机半导体材料的界面复合问题［４～７］．在这些界面间,除形成一定的化学键外［８］,更多的则是伴随着电子的转移和电荷的重新分配［９,１...     

Synthesis and Characterization of a Squarylium Cyanine Dye with Two [60]Fullerene Units

Fullerene derivatives containing two or more [60]fullerene units may exhibit interesting properties1. There have been reported a limited number of organofullerenes with two or more cages, and the synthetic procedures are an oxidative coupling reaction of terminal alkynes2, bifunctional cycloaddition reactions such as diazo compounds3, dienes4 or (-amino acids and aldehydes 1, 3-dipolar cycloaddtion5, cyanogen di-N-oxide as a double 1, 3-dipole6. Oxo- and methylene-bridged [60]fullerene dimers …     

1,3-二-(3,3-二甲基-2-甲烯假吲哚)方酸菁染料的合成及其晶体结构

合成了两个新型方酸菁染料3和5。在催化下,2,3,3-三甲基假吲哚不需N- 烷基化,可直接与方酸反应。反应过程中发生了明显的质子转移。结晶学数据表明,分子3的整体位于同一平面;溶剂苯规则地排在方酸四碳的周围, 后者酷似电子陷肼。染料5有良好的水溶性。     

Photopolymerization reactions initiated by a visible light photoinitiating system: Cyanine dye/borate salt/1,3,5‐triazine

New three‐component photoinitiating systems consisting of a cyanine dye, borate salt, and a 1,3,5‐triazine derivative were investigated by measuring their photoinitiation activities and through fluorescence quenching experiments. Polymerization kinetic studies based on the microcalorimetric method revealed a significant increase in polymerization rate when the concentration of n‐butyltriphenylborate salt or the 1,3,5‐triazine derivative were increased. The photo‐induced electron transfer process between electron donor and electron acceptor was studied by means of fluorescence quenching and SrEt change of the fluorescence intensity. The experiments performed documented that an increase of the n‐butyltriphenylborate salt concentration dramatically increases the rate of dye fluorescence quenching, whereas the increasing of the 1,3,5‐triazine derivative concentration slows down the consumption of the dye. We conclude that the primary photochemical reaction involves an electron transfer from the n‐butyltriphenylborate anion to the excited singlet state of the dye, followed by the reaction of the 1,3,5‐triazine derivative with the resulting dye radical to regenerate the original dye. This reaction simultaneously produces a triazinyl radical anion derived from the 1,3,5‐triazine, which undergoes the carbon‐halogen bond cleavage yielding radicals active in initiation of a free radical polymerization chain. © 2007 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 45: 3626–3636, 2007     

有机太阳能电池的染料结构与光电性能关系的研究

本文用自动测试系统探讨了菁染料和方酸染料的化学性质、结构与其光伏效应之间的关系, 从理论上讨论了载流子光致发生机理。发现在给电子体-受电子体发色团染料中, 光伏效应有显著的取代基效应, 同时观察到量子效率随给电子杂环的碱性及分子离子势等有一定变化规律。讨论了方酸染料的聚集态。     

含叔丁基吡喃鎓方酸菁染料的合成及溶解性能研究

合成了四个对称及不对称含叔丁基吡喃鎓方酸的菁染料,通过光谱和元素分析确定其结构,测定了它们的紫外-可见吸收光谱、熔点和溶解性能。结果表明吡喃鎓方酸菁染料比一般菁染料具有更长的吸收波长和更好的溶解性能。用Dye2的单晶分子堆积图解释了染料的熔点反常现象。     

A mechanistic investigation of a three‐component radical photoinitiator system comprising methylene blue,N‐methyldiethanolamine,and diphenyliodonium chloride

Three‐component systems, which contain a light‐absorbing species (typically a dye), an electron donor (typically an amine), and a third component (usually an iodonium salt), have emerged as efficient, visible‐light‐sensitive photoinitiators. Although three‐component systems have been consistently found to be faster and more efficient than their two‐component counterparts, these systems are not well understood and a number of distinct mechanisms have been reported in the literature. In this contribution, photodifferential scanning calorimetry and in situ, time‐resolved, laser‐induced, steady‐state fluorescence spectroscopy were used to study the initiation mechanism of the three‐component system methylene blue, N‐methyldiethanolamine and diphenyliodonium chloride. Kinetic studies based upon photodifferential scanning calorimetry reveal a significant increase in polymerization rate with increasing concentration of either the amine or the iodonium salt. However, the laser‐induced fluorescence experiments show that while increasing the amine concentration dramatically increases the rate of dye fluorescence decay, increasing the DPI concentration actually slows consumption of the dye. We concluded that the primary photochemical reaction involves electron transfer from the amine to the dye. We suggest that the iodonium salt reacts with the resulting dye‐based radical (which is active only for termination) to regenerate the original dye and simultaneously produce a phenyl radical (active in initiation) derived from the diphenyliodonium salt. © 2000 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 38: 2057–2066, 2000     

Noncovalent labeling of biomolecules with red and near- infrared dyes

Biopolymers such as proteins and nucleic acids can be labeled with a fluorescent marker to allow for their detection. Covalent labeling is achieved by the reaction of an appropriately functionalized dye marker with a reactive group on a biomolecule. The recent trend, however, is the use of noncovalent labeling that results from strong hydrophobic and/or ionic interactions between the marker and biomolecule of interest. The main advantage of noncovalent labeling is that it affects the functional activity of the biomolecule to a lesser extent. The applications of luminescent cyanine and squarylium dyes are reviewed.     

Study of exciton transport in luminescent molecular nanoclusters using energy traps

We used a squarylium dye SQ as a specific exciton trap for J aggregates of the amphiphilic cyanine dye amphi-PIC. The exciton transport parameters in amphi-PIC J aggregates were estimated using a modified Stern–Volmer equation. We found that SQ quenches 50% of the luminescence of amphi-PIC J aggregates for a ratio of 1 SQ molecule per 80 amphi-PIC molecules. Translated from Teoreticheskaya i éksperimental’naya Khimiya, Vol. 45, No. 1, pp. 50–53, January–February, 2009.     

Synthesis of cyanine dyes derived from benzotellurazo‐15‐crown‐5

A series of crown ether cyanine dyes including crown ether styryl cyanine dyes, crown ether merocyanine dyes and crown ether squarylium cyanine dyes (unsymmetric and symmetric) derived from key intermediate 2‐methyl‐5,6(15‐crown‐5)benzotellurazole ( 1 ) were prepared.     

N,N′-对羧苄基吲哚三菁敏化纳米TiO2电极的研究

应用光电化学方法研究了N, N′-对羧苄基吲哚三菁（Cy5）染料敏化TiO2纳米晶电极的光电化学行为,优化了敏化的条件.结合Cy5的循环伏安曲线和光吸收阈值,初步确定Cy5电子基态和激发态能级位置.结果表明,Cy5电子激发态能级位置能与TiO2纳米粒子导带边位置相匹配,因而使用该染料敏化可以显著提高TiO2纳米晶的光电流,使TiO2纳米晶电极吸收波长由紫外光区红移至可见光区和近红外区,光电转换效率得到明显改善,在膜厚为6.5μm、敏化时间为6 h的条件下IPCE值（incident photo-to-electricity conversion efficiency）最高可达46.4％,总的光电转换效率η为1.70％.