Conformationally-Induced Geometric Electron Localization. Interrupted Conjugation, Very Large Hyperpolarizabilities, and Sizable Infrared Absorption in Simple Twisted Molecular Chromophores

摘要

These is intense current research activity in the area of molecular linear and nonlinear optics, devoted to the search for efficient, stable, simple organic chromophores exhibiting large first or second hyperpolarizabilities. Several promising structural motifs have been identified; however the simple planar ones (strong donor or acceptor substituents linked by a polyene, heterocyclic, or aromatic π-network) are still the most common.