Studies of 2-Azaazulenium Derivatives: The Natures of Electron Transitions in the 2-Azaazulenium Cation and in Monomethine Cyanine Dyes Bearing 2-Azaazulenium Moieties as Terminal Groups
作者:Julia Bricks、Aleksey Ryabitskii、Alexei Kachkovskii
DOI:10.1002/ejoc.200900204
日期:2009.7
monomethine cyanine dyes derived from 2-azaazulene have been synthesized. Combined spectral and quantum-chemical investigations of their molecular geometries and of their electronic structures and the natures of their lowest electron transitions have been performed. The analysis results obtained by ab initio and semiempirical methods, together with experimental data obtained from absorption and 13C NMR
已经合成了一系列衍生自 2-氮杂氮杂的新型单次甲基花青染料。已经对它们的分子几何形状、它们的电子结构以及它们的最低电子跃迁的性质进行了光谱和量子化学的组合研究。通过从头计算和半经验方法获得的分析结果,连同从吸收和 13C NMR 光谱获得的实验数据,表明参考 2- 基态 π 电子系统的电荷分布实际上没有差异。 azaazulenium 盐和在带有 2-azaazulene 作为端基的单次甲基花青中,因为它们不依赖于分子轨道的相对位置。然而,由于前沿分子轨道产生的不同机制,盐和单甲炔花青的发色团的光谱特性——以及相应的电子跃迁的性质——截然不同。对于不对称的单次甲基花青,观察到基态和激发态性质的类似差异。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)