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).
描述了新的分子内电荷转移有机
染料。这些分子的设计基于螺环共轭现象,提供了一种模块化方法来制备具有有趣光学性质的独特材料。在该发明的
染料中,受体部分(基于
吲哚酮)的最低未占据分子轨道(LUMO)与供体部分(
胺类、
醇类和
硫醇类)的最高未占据分子轨道(HOMO)进行了螺环共轭。供体和受体之间的相互作用受到前沿轨道的能量和对称性的控制。本文描述的新型
染料具有可预测和可调光学性质,可用于许多光学应用,包括非线性光学(NLO)。