二芳烯类光致变色化合物的合成及其性质

本论文合成了三种新的二芳基乙烯类光致变色化合物1-(2,5二甲基噻吩-3-基),2-[2-甲基-5-(4-甲氧苯基噻吩)-3-基]全氟环戊烯(1a),1-(2,5二甲基噻吩-3-基),2-[2-甲基-5-(4-乙氧苯基噻吩)-3-基]全氟环戊烯(2a),1-(2,5二甲基噻吩-3-基),2-[2-甲基-5-(4-氯苯基噻吩)-3-基]全氟环戊烯(3a),并且研究了它们的光电特性.实验结果表明这些二芳烯化合物在溶液和PMMA膜片中均具有良好的光致变色性能.在313nm紫外灯的照射下,这些二芳烯化合物的溶液和PMMA膜片均由无色变为蓝色,在适当波长可见光照射下,它们均从有色态返回到无色态.在不同的溶液和PMMA膜片中,这些化合物在它们各自的激发波长的照射下均显示出较强的荧光.在313nm紫外灯的照射下,二芳烯由开环态变为闭环态,荧光强度逐渐降低.     

取代基对光致变色不对称二芳烯电化学开关性能的影响

合成了一系列具有不同取代基团的二芳烯化合物,研究了取代基对其电化学开关性能的影响.结果表明:化合物上不同取代基影响其电化学开关性能,与闭环态中取代基苯基上的电子向中心环转移的结果有关;取代基的吸电子性与供电子性对起始氧化电位作用显著,除乙氧基外,氯、氟、甲基、甲氧基在开环和闭环态中对起始氧化电位有较大影响.     

Photoresponsive polyurethane–acrylate block copolymers. I. Photochromic effects in copolymers containing 6′‐nitro spiropyranes and 6′‐nitro‐bis‐spiropyranes

The photochromic effect of polyurethane–acrylate block copolymers containing 6′‐nitro spiropyranes and 6′nitro‐bis‐spiropyranes has been investigated. The influence of incorporation of the photochromic agent into the polymeric matrix as a simple solid solution or in a chemically bonded form and the effects of the composition (polyurethane–acrylate) of the block copolymer were studied. In general, it was observed that the photoresponse for the spiropyranes and especially the bis‐spiropyranes obey the combination of several factors, mainly the spatial and electronic differences between the two forms (Sp.–Mer.) in the photoisomerization of these compounds. Such factors are discussed here. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 71: 259–266, 1999     

Phenazine and meso-1, 2-Diphenyl-1,2-ethanediol – Partners in Photochromic Cocrystals

A hydrogen-bonded network in a 1:1 cocrystal of phenazine and meso-1,2-diphenyl-1,2-ethandiol places phenazine and diol in such a way that a thermally reversible photochromism is produced. The structure of the cocrystal is determined by X-ray crystallography. Thermally reversible changes in the UV/Vis and IR spectrum on irradiation, in combination with the generation of paramagnetism (ESR) lead to the interpretation that a light induced electron transfer between two phenazine molecules is followed by a double proton transfer to the nitrogen atoms of the radical anion of phenazine.     

一种新型含肉桂酸酯结构的螺吡喃光致变色染料的合成与性能研究

A novel bifunctional dye containing spirobenzopyran and cinnaznoyl moiety has been prepared and its photochromic behavior following irradiation at different wavelengths of monochrome UV light was investigated.The colourless bifunctional dye in film or solution exhibits unusual photochromism through structural and geometrical transformation from spirobenzopyran to merocyanine accompanying with photocrosslinking reaction in cinnamoyl moieties. Two kinds of photochemical reaction were achieved by irradiation at the different wavelengths of monochrome UV light (275 nm, 365 nm) selectively. The photochromic process of the bifunctional dye was discussed and the dynamic behaviors of the decolorization process were investigated.     

新型对称双偶氮苯化合物的合成及光学性能

以联苯二胺为原料,通过重氮化、偶联和Williamson醚合成反应,设计合成了一系列新型的对称性不同端基的双偶氮类化合物,考察了溶剂、不同取代基对偶氮化合物紫外吸收影响。以4,4’-二(4-辛氧基-苯偶氮基)-联苯(Azo3)为例,在365 nm紫外光照射下发生反-顺光异构化,光照10 min后达到光稳定态,具有良好的光致变色性。     

1-苯氧基-9，10-蒽醌的合成与光致变色性研究

报道了一种新的光致变色化合物1．苯氧基-9,10．蒽醌的合成方法,具有较高产率。目标化合物的紫外一可见光谱在387,319,281nm处有3个等吸光点,在波长472nm处吸收变化明显,证明了1-苯氧基-9,10-蒽醌具有光致变色性,且光致变色效果较好。     

Rational Design of Double-Check Mercury Ion Chemosensors Based on Photochromic Compounds

A new photochromic compound, S1 , containing a trans-cis photoisomerizable unit and a mercury detecting chemosensor unit, has been designed and synthesized. S1 displayed dramatic selectivity for mercury ions over other ions, through fluorescence intensity measurement. In addition, in the photostationary state, a colorimetric response to mercury ions was also achieved. The fluorescence turn-off of S1 by mercury ions was defined as the first check, while mercury-induced colorimetric variation in the photostationary state was set as the second check. Thus, a double-check mercury chemosensor can be achieved.     

吲哚啉苯并吡喃磺酸的合成及水性光致变色墨水的配制

由5-硝基水杨醛和吲哚啉合成了6-硝基-1',3',3'-三甲基-5'-磺酸基吲哚啉苯并吡喃光致变色材料,进行了红外、紫外和质谱等表征,研究了其在氯仿和乙醇溶液中的光致变色行为,对其光致变色机理进行了探讨。配制了具有绿色环保、成本较低的水溶性光致变色墨水。