Spiroconjugated charge-transfer dyes for optical applications
申请人:The Penn State Research Foundation
公开号:US05591848A1
公开(公告)日:1997-01-07
New intramolecular charge-transfer organic dyes are described. The design of these molecules is based on the phenomenon of spiroconjugation, and it provides a modular approach to the preparation of unique materials with interesting optical properties. In the dyes of the invention, the lowest unoccupied molecular orbital (LUMO) of the acceptor part (based on indandione) is spiroconjugated with the highest unoccupied molecular orbital (HOMO) of the donor part (amines, alcohols and thiols). The interaction between the donor and acceptor is controlled by the energy and symmetry of the frontier orbitals. The novel dyes described herein, with predictable and tunable optical properties, can be used in many optical applications including nonlinear optics (NLO).
Optical Properties of Spiroconjugated Charge-Transfer Dyes
作者:Przemyslaw Maslak、Anu Chopra、Christopher R. Moylan、Rüdiger Wortmann、Sonja Lebus、Arnold L. Rheingold、Glenn P. A. Yap
DOI:10.1021/ja9533003
日期:1996.1.1
donor part (aromatic diamine or amino thiol). The interaction between the donor and acceptor is controlled by the energy and symmetry of the frontier orbitals. The ground state dipole moments of these compounds are aligned along the long molecular axes. In the solid state, distortions of structures are observed that are consistent with partial electron shift from the donor to the acceptor. Much more
制备了一种新型分子内电荷转移染料。这些化合物中受体部分(1,3-茚二酮)的 LUMO 与供体部分(芳族二胺或氨基硫醇)的 HOMO 螺共轭。施主和受主之间的相互作用受前沿轨道的能量和对称性控制。这些化合物的基态偶极矩沿分子长轴排列。在固态下,观察到结构的畸变,这与从供体到受体的部分电子转移一致。在可见光谱区观察到的电子跃迁伴随着更明显的电子密度变化。这些跃迁属于电荷转移 (CT) 类型,如溶剂化变色和光电研究所示。激发态偶极矩的方向与基态的方向相反。这些观察结果与具有自由基离子对特征的激发态一致。新染料是模式...