共查询到18条相似文献,搜索用时 62 毫秒
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以6-氯-5,12-萘并萘醌为起始原料,合成了9-苯氧基-并四苯[5,6-bc]吡喃-2,8-二酮,通过元素分析、IR、1H NMR和E IM S对其结构进行了表征。研究表明:9-苯氧基-并四苯[5,6-bc]吡喃-2,8-二酮可以发生类似于苯氧基萘并萘醌的光异构化反应,trans-form的最大吸收峰出现在421 nm处,而ana-form在490 nm和524 nm处显示出特征双峰,并且在354、388和450 nm处有3个等吸光点。 相似文献
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《国际聚合物材料杂志》2012,61(1-2):63-78
Abstract Photochromic imidazolone azopolycyanurates containing mercury dithizonate moiety have been prepared by interfacial polycondensation technique. All the azopolycyanurates have been characterized by their IR spectra, viscosity, molecular weight by GPC and thermogravimetry. The film of PMMA blended with photochromic imidazolone azopolycyanurate shows a very good photochromic effect on exposure to sunlight and regains its original colour on removal of sunlight. The change of return to the original colour have been measured using Beckman DK-2A Ratio Recording Spectrophotometer. 相似文献
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Liviu Sacarescu Gabriela Sacarescu Mihaela Simionescu Nicolae Hurduc 《Journal of Inorganic and Organometallic Polymers and Materials》2009,19(3):348-354
This work presents the influence of the trans–cis photoisomerization process of azobenzene-segments onto the optical properties of polysilanes. For this purpose 4-(phenyldiazenyl)phenol
and 4-[(4′-nitrophenyl)diazenyl]phenol groups were attached to poly[diphenylsilane-co-methyl(bromopropyl)silane] using the
Williamson etherification conditions. Photoisomerization of the pendant azo-groups by irradiation with 365 nm UV light induced
distortion of the polysilane backbone conformation in a reversible manner. This process was studied by UV spectral analysis
and the photochromic behavior of both polymers was established by taking into account the variation of the σ–σ* absorption
intensity. 相似文献
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热处理对离子交换法制备光致变色玻璃光色性能的影响 总被引:1,自引:1,他引:0
热处理对离子交换法制备光致变色玻璃光色性能的影响王民权,陈庆云,樊先平(浙江大学材料科学与工程学系310027)EffectofHeatTreatmentonthePhotochromicPropertiesofPhotochromicGlassby... 相似文献
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报道了3-甲基-1-对氯苯氧基-9,10-蒽醌的合成、表征及其光致变色性,并通过核磁共振谱、质谱、红外光谱和紫外-可见光谱确定了结构.其紫外光谱图在389,312 nm处有2个等吸光点,有特征吸收单峰出现在482 nm处,其峰型有向双峰变化的趋势.由于苯氧基有吸电子取代基氯,导致其光致变色效果一般,但从紫外光谱图来看,其光致变色性还是比较明显. 相似文献