Novel, Blue‐Transparent Frequency Doublers Based on 1,8‐Di(hetero)arylnaphthalenes

Abstract

Consecutive Suzuki coupling provides a general method for preparing 1,8-diarylnaphthalenes such as 2 (A = acceptor, D = donor) from the boronic acid 1. Noncovalent π–π interactions render them markedly more NLO-active than the 1,5-isomers (which absorb at longer wavelength) and thus fascinating alternatives to the best, classical, blue-transparent frequency doublers.