Synthesis and chemiluminescent properties of 6,8-diaryl-2-methylimidazo[1,2-a]pyrazin-3(7H)-ones: Systematic investigation of substituent effect at para-position of phenyl group at 8-position
作者:Ryota Saito、Takashi Hirano、Shojiro Maki、Haruki Niwa
DOI:10.1016/j.jphotochem.2014.07.016
日期:2014.11
8-Diphenylimidazopyrazinone derivatives having a substituent R (R = CF3, H, and OMe) at para position of the 8-phenyl group were synthesized and their chemiluminescent properties were investigated. The chemiluminescence maxima (CLmax) of these compounds were observed to be in the range of 513–553 nm with a bathochromic shift that increased with the electron-withdrawing character of R, contrary to the
合成了在8-苯基对位具有取代基R(R = CF 3,H和OMe)的6,8-二苯基咪唑并吡嗪酮衍生物,并研究了其化学发光性能。观察到这些化合物的化学发光最大值(CL max)在513-553 nm范围内,其红移随R的吸电子特性而增加,这与之前在6位上观察到的取代基作用相反。化学发光效率(φ CL这些imidazopyrazinones的)通过引入的改进p在8位上取代的苯基。三种量子效率的定量研究(ϕ[R ,φ小号和φ FL),其产品为我们提供了φ CL,发现该φ CL制成涨幅的,主要是因为在相应的光发射器(的荧光量子产率的值的增加φ FL)。的单重激发发射器(的收率φ小号化学发光反应期间)被发现是非常小的(0.015-0.019),这表明一个无法构造一个有效的imidazopyrazinone化学发光系统,该系统只使用可媲美水母发光蛋白的生物发光系统取代基的电子效应。