Highly Substituted Azulene Dyes as Multifunctional NLO and Electron-Transfer Compounds
作者:Christoph Lambert、Gilbert Nöll、Manfred Zabel、Frank Hampel、Elmar Schmälzlin、Christoph Bräuchle、Klaus Meerholz
DOI:10.1002/chem.200304923
日期:2003.9.5
substituted azulene derivatives were synthesised by Pd-mediated dimerisation from the corresponding tolan species. One azulene derivative (2) has donor functionalities (dianisylaminophenyl and dianisylamino) in the 1-, 2-, 3- and 6-positions, while the other (1) has donors (dianisylaminophenyl) in the 2- and 6-positions and acceptors (nitrophenyl) in the 1- and 3-positions. Each azulene derivative shows
通过Pd介导的二聚作用,从相应的tolan物种合成了两个高度取代的azulene衍生物。一种a菁衍生物(2)在1、2、3和6位上具有供体官能团(dianisylaminophenyl和dianisylamino),而另一种(1)在2和6位上具有供体(dianisylaminophenyl)和受体(硝基苯基)位于1和3位。每种a唑衍生物在固态下均表现出很强的键长变化,这是通过X射线晶体分析确定的,并且在其UV / Vis光谱中大约在450-500 nm处具有很强的CT带。1和2的一阶超极化率是通过超瑞利散射测量的,大约是分散红DR1的一阶。两种a烯衍生物均显示出多种氧化过程。通过UV / Vis / NIR光谱电化学研究了1和2的混合价自由基阳离子的分子内绝热ET行为。可以通过广义Mulliken-Hush理论分析1(+)的间隔-CT谱带,该谱带产生光耦合绝热空穴转移的电子耦合V = 1140