摘要
研究了１’－十八烷基－３’，３’，－二甲基－６，８－二硝基螺［２Ｈ－１－苯并吡喃－２，２’－吲哚啉］的逆向光致变色特性，通过吸收光谱测定了其在不同溶剂中可见光照后无色体（ＳＰ）的开环生色速率常数及在甲醇中有色体（ＭＣ）光照关环的光量子产率，发现溶剂的极性对开环有色体（ＭＣ）的吸收光谱影响较大，但对无色体的开环速率常数的影响相对较小。利用￣１ＨＮＭＲ分析了ＳＰ和ＭＣ的结构，证实了ＭＣ处于反式构型．
The inversely photochromic property of an indoline spiropyran is investigated by UV-visible and ￣1 HNMR spectra. The results indicate that the polarity of solvent has promineneffect on the λ_(max) of its colored merocyanine form(MC),but the effects on the λ_(max) of theclosed form(SP) and the coloration rate after visible bleaching are rather weak. The lighbleaching quantum yield of the colored form in methanol is determinated to be 0.096,Fromthe ￣1 HNMR spectra,the structural characteristics of MC,SP are analyzed.
出处
《感光科学与光化学》
CSCD
1995年第4期294-300,共7页
Photographic Science and Photochemistry
关键词
逆向光致变色
螺吡喃
光量子产率
光致变色
inverse photochromism, indoline spiropyran,polarity effect of solventquantum yield,￣1HNMR. To whom correspondence should be addressed.
