Structure of the photocolored 2-(2',4'-dinitrobenzyl)pyridine crystal: two-photon induced solid-state proton transfer with minor structural perturbation

J Am Chem Soc. 2002 Jul 24;124(29):8540-1. doi: 10.1021/ja0170908.

Abstract

The X-ray structure of the blue phototautomer of 2-(2',4'-dinitrobenzyl)pyridine (DNBP) produced by two-photon excitation in a single crystal is the first direct evidence of a product in the DNBP photochromic family. A nitro-assisted proton transfer mechanism is attributed to the photocoloration of solid DNBP.