1,8-Naphthalimides as Stereochemical Probes for Chiral Amines: A Study of Electronic Transitions and Exciton Coupling
作者:J. Gawroński、K. Gawrońska、P. Skowronek、A. Holmén
DOI:10.1021/jo981760j
日期:1999.1.1
231 nm is perfectly suited for absolute configuration assignments of amine derivatives on the basis of the bichromophoric exciton coupling. Both degenerate (bis-1,8-naphthalimide) and nondegenerate (1,8-naphthalimide-phthalimide, 1,8-naphthalimide-phenyl, or 1,8-naphthalimide-benzoate) couplings were studied. In the latter case, the sign of the exciton Cotton effect was opposite to the sign of the
根据电子跃迁的数量及其极化分析了1,8-萘二甲酰亚胺的吸收光谱和磁圆二色性(MCD)光谱。实验结果得到了半经验INDO / S计算的支持。结果表明,在双色发性激子偶合的基础上,位于231 nm的1,8-萘二甲酰亚胺生色团的pi-> pi萘跃迁是非常允许的。研究了简并的(双-1,8-萘二甲酰亚胺)和非简简的(1,8-萘二甲酰亚胺-邻苯二甲酰亚胺,1,8-萘二甲酰亚胺-苯基或1,8-萘二甲酰亚胺-苯甲酸酯)偶联。在后一种情况下,对于相同的绝对构型,激子棉花效应的符号与简并激子棉花效应的符号相反。