A novel photoreversible photochromic system involving a hydrogen transfer/cyclization sequence†
Abstract
A novel photoreversible photochromic system, 3-(2-benzylbenzoyl)-1,2-R,R1-4(1H)-quinolinones/12-hydroxy-5-R-5a-R1-6-phenyl-5a,6-dihydrobenzo[b]acridin-11(5H)-ones, is described.