N. Zaidi, M. Bryce, G. Cross
Jun 12, 2000
Citations
0
Influential Citations
9
Citations
Journal
Tetrahedron Letters
Abstract
Abstract The reaction of N , N -bis(2-hydroxyethyl)aniline 1 with tetracyano- p- quinodimethane (TCNQ) 2 yields the photochromic red chromophore 3 [ λ max (acetone/dichloromethane) 497 nm] which upon UV irradiation is converted into the blue zwitterionic form 3 ′ ( λ max 680 nm) by a novel intramolecular charge transfer process involving a d -quinoid-aryl-A→ d + -aryl-quinoid-A − conversion. The analogous process occurs in the polyimide derived system 8 . Different products are isolated from reactions of 1 with the stronger electron acceptors TCNQBr 2 and TCNQF 4 .