作者:Soichi Uchida、Shintaro Yamada、Yasushi Yokoyama、Yukio Kurita
DOI:10.1246/bcsj.68.1677
日期:1995.6
with a bulky 1-alkyl-1-indolylmethylidene and/or a bulky alkylidene substituent were synthesized and their photochromic as well as absorption spectroscopic properties were compared with those of the known prototype indolylfulgide, 3-[1-(1,2-dimethyl-3-indolyl)ethylidene]-4-isopropylidenedihydro-2,5-furandione. An increase in steric bulkiness of the alkyl group (R1) on the indolylmethylidene group increased
合成了具有庞大的 1-烷基-1-吲哚基亚甲基和/或庞大的亚烷基取代基的光致变色富酸酐,并将它们的光致变色和吸收光谱性质与已知原型吲哚基富酸酐、3-[1-(1,2-二甲基-3-吲哚基)亚乙基]-4-异亚丙基二氢-2,5-呋喃二酮。吲哚亚甲基上烷基 (R1) 的空间体积增加增加了着色量子产率 (ΦEC = 0.046 (R1 = 甲基) 至 0.31 (R1 = 异丙基)),而其他亚烷基的空间体积增加组 (R2) 增加了漂白量子产率 (ΦCE = 0.051 (R2 = 异丙叉) 到 0.42 (R2 = 2-金刚烷基))。然而,当 R1 和 R2 都很大时,着色量子产率并不大,尽管漂白量子产率仍然很大。