Photochromism in spiroindolinonaphthoxazine dyes: Effects of alkyl and ester substituents on photochromic properties
作者:Steven M. Partington、Andrew D. Towns
DOI:10.1016/j.dyepig.2014.01.005
日期:2014.5
The impact of substituents on the photochromism of some spirooxazines has been explored. A series of photochromic spiroindolino[2,1-b][1,4]naphthoxazine dyes was prepared with varying alkyl substitution patterns in the 3- to 6-positions of the indoline system. It was found that placing methyl functions onto the phenyl ring produced bathochromic shifts in λmax of the photomerocyanine as expected, but
已经研究了取代基对一些螺恶嗪的光致变色的影响。制备了一系列光致变色螺螺吲哚并[2,1- b ] [1,4]萘恶嗪染料,它们在二氢吲哚系统的3至6位上具有不同的烷基取代方式。据发现,将甲基功能集成到苯环中制备红移λ最大预期的photomerocyanine的,但相反的降低photocoloration半衰期文献指示。然而,替换为导致更强烈的光致变色3-乙基-3-甲基取代的3,3-二甲基图案:半衰期增加,而不会影响λ最大。相反,与类似染料的文献报道相比,引入环己基环产生3,3-戊亚甲基片段并在萘并恶嗪部分的5'-位置被酯或羟甲基取代可以显着提高褪色速度。系列。在较小的一组光致变色[1,2- b ] [1,4]恶嗪合成集中,也观察到了有关烷基取代的类似作用。