高性能光致变色材料的制备

本文制备了一种吲哚啉螺噁嗪类光致变色染料及其水性聚氨酯复合材料.测试结果显示:该材料具有良好的耐光性.     

用三乙胺催化合成丙烯酰氧基吲哚啉螺萘并噁嗪染料

在无水乙醇中,用三乙胺和1-亚硝基-2,7-二羟基萘以及1,2,3,3-四甲基吲哚碘化物一步法反应,合成了9’-羟基吲哚啉螺萘并噁嗪;进一步在无水乙醚中,用三乙胺和9’-羟基吲哚啉螺萘并噁嗪以及丙烯酰氯反应,合成了9’-丙烯酰氧基吲哚啉螺萘并噁嗪染料。分析了有机碱三乙胺在这两步合成中的催化作用,通过实验对比选择了高产率易操作的合成路线。将打印纸在题示染料的丙酮溶液中浸渍,经太阳光照射显示出良好的光致变色性能。     

9＇-取代吲哚啉螺噁嗪衍生物的合成与光谱性质

将2个9’－羟基吲哚啉螺萘并噁嗪衍生物（Ia、Ib）,进一步以N,N’－二环己基碳二酰亚胺为脱水剂、4－二甲氨基吡啶为催化剂合成了2个9’－丙烯酰氧基吲哚啉螺萘并噁嗪衍生物（IIIa,IIIb）和2个9’－（α－呋喃丙烯酰氧基）吲哚啉螺萘并噁嗪衍生物（Va,Vb）。通过元素分析、^1HNMR和IR对产物的结构进行了表征。将化合物Ⅲa的乙醇溶液浸渍在脱脂棉上,经太阳光照射由无色变为蓝色;当脱脂棉移至阴暗处后,蓝色慢慢变淡消失。光致变色过程循环50次无异常发生,显示出良好的光致变色性能。     

螺噁嗪类有机光致变色材料的研究进展

螺噁嗪类光致变色材料出现至今已有70多年历史,是光致变色材料中的佼佼者。虽然光致变色材料普遍抗疲劳性能较差,但是与传统光致变色材料相比,螺噁嗪类光致变色材料具有化学性质稳定、光响应快、抗疲劳性好等优点,是一种极具开发潜力和应用前景的功能型材料。     

N-甲基螺噁嗪光致变色染料的合成及其光致变色性质研究

以1,3,3-三甲基-2-亚甲基吲哚啉和1-亚硝基-2-萘酚为原料合成了N-甲基-3,3-二甲基螺吲哚啉-2,3'[3H]萘并[2,1-b][1,4]噁嗪,对其进行了紫外和红外光谱以及元素分析,并对其光致变色性质以及主要影响因素温度、溶剂和pH进行了研究.结果表明,该化合物具有良好的光致变色性和一定的酸致变色性;温度、溶剂极性和pH对其光致变色性有不同程度的影响.     

键合光致变色螺噁嗪侧基的聚合物研究进展

综述了键合螺噁嗪侧基聚合物的研究进展。由于螺噁嗪类化合物的光致变色性质在光信息存储材料等领域有巨大的应用前景,特别关注了各种聚合物体系对螺噁嗪衍生物光致变色行为的影响。     

螺萘并噁嗪类光致变色化合物的合成与光谱性能研究

合成了三种螺萘并噁嗪类光致变色染料:N-甲基-3,3-二甲基螺吲哚啉-2,3’-[3H]萘并[2,1-b][1,4]噁嗪及其6’-位氮杂环取代化合物,并通过1H-NMR、IR表征了它们的分子结构。利用紫外光谱探索了目标产物的光致变色性能。结果表明:随着溶剂极性的增强,其呈色体最大吸收波长发生红移;环上6’-位取代基的电子效应对开环体的光谱性能有明显影响,取代基的给电子性越强,其吸收光谱发生蓝移。     

光致变色螺噁嗪类化合物的合成研究进展

螺噁嗪是一类重要的有机光致变色化合物,在光信息存储介质、分子开关、军事伪装等领域有着潜在的应用价值。为了得到性能更加优异的螺噁嗪类光致变色化合物,各种不同结构的螺噁嗪类化合物的合成一直是这一领域的研究焦点。以关注螺噁嗪类化合物的合成路线为目的,综述了螺噁嗪类化合物、含螺噁嗪的双光致变色体系、含螺噁嗪基团的聚合物及水溶性螺噁嗪化合物的合成路线,介绍了微波技术、超声技术在螺噁嗪衍生物合成中的应用,指出了螺噁嗪类化合物合成领域尚待加强的几个重点方向。     

PMMA和PS掺杂螺吡喃光致变色膜的制备及其变色性能

由5-硝基水杨醛和吲哚啉合成了6-硝基-1’,3’,3’-三甲基吲哚啉苯并吡喃光致变色化合物,研究其在溶液中的光致变色行为。将6-硝基-1’,3’,3’-三甲基吲哚啉苯并吡喃分散在PMMA和PS的四氢呋喃溶液中,制成螺吡喃光致变色薄膜,并研究其成膜和变色效果以及膜的稳定性。     

吲哚啉螺吡喃光致变色化合物研究的最新进展

综述了近年来吲哚啉螺吡喃研究现状与动向，介绍了它们的结构，合成方法以及在光信息存储材料中的光致变色性能.有45篇参考文献.     

Incorporation of indolinospirooxazine on ethylene-vinyl acetate copolymer to produce a intelligently temperature-regulated nonwhite cool material

Cool materials that adjust cooling efficiency according to sunlight intensity are needed because people have different needs for cooling at different times. Several colors of commercial microencapsulated photochromic powder were melt blended with ethylene-vinyl acetate copolymer in a two-roll mill at 90 °C to prepare the photochromic films of corresponding colors. Pink photochromic films [the organic photochromic compound is indolinospirooxazine (NISO)] were selected to continue the following variable experiment due to its best performance in the indoor cooling test. The pink photochromic films change color as well as transmittance according to the intensity of sunlight, thereby achieving an intelligent cooling effect. A maximum decrease around 10 °C was observed in natural environment when the addition amount of pink photochromic powder reaches 2.0 phr under strong sunlight and all films did not show cooling effect under weak sunlight. This material can be covered on buildings to regulate the indoor temperature. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137, 48887.     

有机光致变色功能涂料的研制

对有机光致变色化合物在涂料体系中的应用进行了系统的研究,确定了最佳涂料配方,研制开发了有机光致变色功能涂料,其涂层表现出明显的光致变色性,并讨论了三种不同化合物的光致变色时间与结构的关系,荧光发射光谱以及与无机稀土类光致变色化合物涂料光谱性能的异同,最后研究了涂料的稳定性能和涂层的稳定性,指出关键是化合物呈色体必须有足够的热稳定性和耐疲劳性。     

螺噁嗪类光致变色化合物的制备及其性能初探

通过萘并噁嗪环上引入不同类型的取代基,合成了三种螺噁嗪光致变色化合物。研究了其光致变色性能和抗疲劳性能,结果表明,在紫外灯照射下由无色变为蓝色,这种变化是可逆的,并且具有较高的抗疲劳性。     

Redox behavior in photochromic polymers of the thiazine series

The photochromic redox behavior of the thiazine polymers prepared by the condensation reactions of the N-hydroxymethylacrylamido components of vinyl polymers with four thiazine compounds, i.e., thionine and asym-dimethyl-, trimethyl-, and mono-methylthionine chloride, in combination with various electron-donating components, including hydroxyl, amino, and sulfhydryl groups and ferrous ion, were investigated. The reversible color fading (at ca. 600 mμ) of the thiazine polymers under illumination in the solid state was found to be largely dependent upon the moisture content in the polymer. This, together with other evidence, suggests that water molecules adsorbed on the active groups in the polymer also participate in the reduction of the thiazine components. Polyvinyl alcohol, cellulose, and enzymes such as papain, when incorporated in the photochromic compositions, induce remarkable improvements of the photochromism, in both the sensitivity to light and the rate of color recovery in dark; the incorporation of the ferrous–ferric ion system into the polymers in the form of acrylates also improves photochromism remarkably, especially the rate of recovery.     

PVB光致变色夹层安全玻璃的制备及性能研究

以1,2,3,3-四甲基吲哚啉碘化物和5-硝基水杨醛为原料合成了光致变色吲哚啉螺吡喃化合物,并将其制成了一种PVB光致变色夹层安全玻璃,对其抗冲击强度性能和光照前后紫外可见光谱进行了分析测试。结果表明,所制备的PVB夹层安全玻璃符合GB9 962-1999中对安全玻璃强度的技术要求,同时还具有调光作用和光致变色性能。     

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.     

Preparation and photochromic behavior of borosilicate aluminate glass for smart window and curtain wall applications

Sunlight-induced photochromic glass exhibits attractive application prospects in the field of architecture materials. In this work, a series of borosilicate aluminate photochromic glasses containing AgCl nanocrystals were prepared. The photochromic property and mechanisms were systematically investigated. The color of the glass turned from transparent to black (or dark grey) under the irradiation of 365 nm ultraviolet light (or sunlight). Placing in a dark environment, the color of photochromic glass gradually restores to its initial state. From the results of in situ TEM and XPS measurement, it is found that the photochromic and self-bleaching behavior of borosilicate aluminate glass originated from the formation and decomposition of silver nanoparticles. Utilizing the photochromic and self-bleaching properties of the glass, the transmittance of the glass could be reversibly modulated. The cycle measurement shows excellent repeatability, demonstrating the potential application of AgCl-contained borosilicate aluminate photochromic glass in the fields of smart building windows and curtain walls.     

Photochromic performance optimization of polyurethane microcapsules by interfacial polymerization method

Spiropyran photochromic materials have been widely studied in military camouflage, optical data storage, information encryption, and fashion ornaments. The non-photochromism and low endurance of solid spiropyran make the challenges of their application. Photochromic microcapsules with a butyl acetate solution of spiropyran as core and polyurethane as shell are synthesized via interfacial polymerization. The optimized polyurethane photochromic microcapsules are prepared with a Tween 20 concentration of 4 wt%, core–shell ratio of 16:5, and spiropyran concentration of 0.40 wt%. Polyurethane photochromic microcapsules with a mean particle diameter of 0.33 μm are obtained. The morphology shows smooth spheres, and the core–shell structure is observed. Butyl acetate in the microcapsule core does not evaporate at a temperature lower than 218.01°C as the microcapsule shell insulates heat. The polyurethane photochromic microcapsules are mixed with adhesive, thickener, and water into a paste and screen-printed on cotton fabric. The printed fabric shows the ΔE of 17.56, 11.93, and 6.96 after 80s irradiation with the xenon lamp intensity of 102, 68, and 34 mW cm⁻². The light stability of the photochromic fabric is excellent as ΔE decreases about 8.28% after 20 cycles of UV-Vis irradiation.     

紫精类杂化光致变色材料的研究进展

紫精是良好的电子受体,受光激发后会发生电子迁移,但是其光还原态极不稳定,而杂化的方式可明显提高化合物的稳定性,因此紫精类杂化光致变色材料具有实际应用价值。文章简要综述了近几年的紫精类杂化光致变色化合物的研究进展。     

光敏变色聚丙烯纤维的研究

本文采用共混熔融纺丝法比较成功地制得了两种具有良好光致变色能力的光敏变色聚丙烯纤维:经阳光照射后,一种由白色变为蓝色,另一种由黄色变为绿色。文章探索了它们的纺丝及拉伸工艺条件,研究了光敏剂的不同加入量对于纤维变色性能、力学性能以及其结构的影响。并测试了该纤维的耐皂洗性和光照耐久性。