摘要
螺吡喃是一类重要的光致变色化合物．螺吡喃的正向光致变色是指在紫外光照下，螺吡喃分子的Ｃ—Ｏ键异裂，由闭环无色体（ＳＰ）可逆地变成开环有色体（ＭＣ）．所形成的有色体可以在暗条件下热致褪色或在可见光照下褪成无色体（示意图１）．它的逆向光致变色是指某一类螺...
Two novel cationic
indolinospirpoyrans, 1(nbutyltriethylammonium iodide)3,3dimethyl6nitro8methoxyspirone] and
1(nbutyltriethylammonium iodide)3,3dimethyl6,8dinitrospirobenzopyran2,2indoline], were
synthesized and characterized by suitable methods. The structures and configurations of MC
and SP of the two compounds are assigned via their 1H NMR spectra. The photochromism
properties of the two compounds were investigated. It was found that the former one shows
normal photochromism and the later one shows negative photochromism. The decoloration and
coloration process of the two compounds fit firstorder kinetics very well, and their rate
constants are 1.2110-2s-1 and 4.010-5s-1, respectively.
出处
《感光科学与光化学》
CSCD
1999年第3期264-269,共6页
Photographic Science and Photochemistry
关键词
光致变色材料
阳离子
螺吡喃
吲哚啉螺吡喃
indolinospiropyran, normal
photochromism, negative photochromism
