Exciton Chirality. (A) Origins of and (B) Applications from Strongly Fluorescent Dipyrrinone Chromophores
作者:Stefan E. Boiadjiev、David A. Lightner
DOI:10.1007/s00706-004-0278-3
日期:2005.3
examples of its application to organic stereochemistry are presented. (B) N , N ′-Carbonyl-bridged dipyrrinones constitute a new class of highly fluorescent chromophores suitable for investigations of stereochemistry and absolute configuration. N , N ′-Carbonylxanthobilirubic acid esters are strongly fluorescent, with a fluorescence quantum yield (φF) ∼0.8, but produce only weak exciton CD from the trans
(A)给出了激子相互作用的起源及其在有机立体化学中的应用实例。(B) N , N′- 羰基桥联的二吡啶酮构成一类新的高荧光发色团,适用于立体化学和绝对构型的研究。 Ñ , Ñ '-Carbonylxanthobilirubic酯是强荧光,用荧光量子产率(φ ˚F)〜0.8,但产生从只弱激子CD 反式 -1,2-环己二醇模板。类似物与苯甲酸的酯代替丙酸 N , N'- 羰基-8-(4-羧基苯基)-3-乙基-2,7,9-三甲基-(10 ħ )-dipyrrin -1-酮,表现出强的荧光(φ ˚F = 0.68,λ EM = 493纳米,λ EX在CHCl = 422纳米3)和有机溶剂中的UV-Vis吸收(ɛ~21000在424纳米)。其与(1 S ,2 S )-环己二醇的二酯 是发荧光的并且表现出激子圆二色性(Δɛ= + 15 dm 3 ·mol -1 ·cm -1,λ= 432 nm;Δɛ=