共查询到16条相似文献,搜索用时 109 毫秒
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20世纪80年代中期以来, 关于螺噁嗪在光致变色过程中的光化学和光物理现象的研究非常活跃. 综述了近20年来对溶液中的螺噁嗪、晶体螺噁嗪以及固体介质中的螺噁嗪的光致变色机理研究结果, 同时介绍了实验研究方法和理论研究方法在螺噁嗪光致变色过程研究中的应用, 分析了取代基对光致变色性质的影响. 阐述了机理研究对新型螺噁嗪设计合成的重要指导意义. 相似文献
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在超声波辐射条件下,以Fischer碱、1-亚硝基-2,7-二羟基萘为原料,无水乙醇为溶剂快速合成了三个螺嗪类光致变色化合物,通过1 H NMR、IR对目标产物的结构进行了表征,讨论了超声辐射时间对合成产率的影响,利用超声波法合成螺噁嗪类光致变色化合物反应速率快、产率有所提高. 相似文献
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合成了一种新的含二茂铁基螺噁嗪类光致变色化合物,并研究了其吸收光谱和荧光光谱。发现在分子内引入二茂铁基团提高了热不可逆性,发生光致变色反应前后化合物结构的不同对其荧光特性影响很大。 相似文献
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本文合成了 4种螺噁嗪类化合物,并通过FTIR、1H NMR、ESI-MS对其结构进行了表征.研究了吲哚环上氮原子和噁嗪环9'位不同的取代基及溶剂化效应对其光致变色性能的影响.结果表明,吲哚环的氮原子引入体积较大的基团对螺噁嗪最大吸收波长无明显影响,然而有利于开环体的稳定性,且溴原子的引入会影响螺噁嗪的光响应性;噁嗪环... 相似文献
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L. Hou B. Hoffmann H. Schmidt M. Mennig 《Journal of Sol-Gel Science and Technology》1997,8(1-3):923-926
The experimental results on the photochromic and mechanical properties of coatings containing 1,3-dihydro-1,3,3-trimethylspiro[2H-indole-2,3′-(3H)-naphth(2,1-b)(1,4)
oxazine] (SO) derived from 3-glycidyl-oxypropyltrimethoxysilane (GPTMS), bisphenolA (BPA) and 1-methylimidazole (MI) by sol-gel processing are presented. It is shown that heat treatment temperature is a conflicting
factor to the photochromic intensity (ΔA
0), photostability and abrasion resistance of the photochromic coatings. With increasing densification temperature the matrix
rigidity increases leading to a decrease of ΔA
0 and at the same time an enhancement of both abrasion resistance and photostability, the optimum heat treatment temperature
is 110°C under our experimental conditions. By the use of certain additives, e.g., fluorosilanes (FAS), not only ΔA
0 but also the photostability and the abrasion resistance of the photochromic coatings have been further improved. 相似文献
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L. Hou H. Schmidt B. Hoffmann M. Mennig 《Journal of Sol-Gel Science and Technology》1997,8(1-3):927-929
Organic-inorganic hybrid materials synthesized via sol-gel processing are excellent solid matrices for photochromic dyes like
spirooxazine, and the photochromic performance can be further enhanced by introducing suitable additives. This work describes
the effects of additives on the photochromic intensity (ΔA
0), decolouration rate (k) and photostability of spirooxazine in sol-gel derived organic-inorganic hybrid matrices. They include fluoroalkylsilane
(FAS), bisphenolA (BPA) and methyl-imidazole (MI). FAS enhances both ΔA
0 and photostability, but has little effect onk. The higher the content of BPA, the higher the ΔA
0 and the higher the photostability, but the lower thek. The effect of MI on ΔA
0 andk is not so considerable as that of BPA and is a little complicated, while significant improvement in photostability is achieved
by the addition of MI at an optimum concentration with the presence of BPA at a higher content. 相似文献
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合成了分子结构中含活性C—Br键的N-乙基-9′-正溴丁氧基螺噁嗪(Br-SO),利用Br-SO分子结构中的化学基团C—Br与部分水解的聚甲基丙烯酸甲酯(hPMMA)反应制备含SO的PMMA高分子化合物(SO-hPMMA)。采用1 HNMR和IR对Br-SO结构进行了表征,研究了Br-SO、SO-hPMMA的光致变色性能及其影响因素。研究表明:Br-SO、SO-hPMMA均具有良好的光致变色性能,且SO-hPMMA的热稳定性明显高于Br-SO。 相似文献
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HuiGUO WuXinZOU QiJI JiBenMENG 《中国化学快报》2005,16(6):751-754
A series of photo active azido analogues have been synthesized and their photochromic properties have also been investigated by UV-Vis spectrum. It will be used for the rapid and reliable preparation of large amounts of stable, non-radioactive labeled DNA and RNA hybridization probes. And it is supposed to be easily detected for its photochromic properties. 相似文献