Synthesis, Crystal Structure and Photochromic Properties of a New Unsymmetrical Diarylethene. (September 2013)

• Record Type: Journal Article
• Authors: Fan, Congbin; Cui, Shiqiang; Pu, Shouzhi; Huang, Qianli; Liu, Gang
• Is Part Of: Journal of chemical research. Volume 37:Number 9(2013)
• Page Start: 574
• Page End: 578
• Publication Date: 2013-09
• Subjects: crystal structure -- photochromism -- fluorescent switch; Chemistry -- Research -- Periodicals; Chemistry -- Periodicals; 540.5
• DOI: 10.3184/174751913X13756095995841
• Languages: English
• ISSNs: 1747-5198

Abstract

A new unsymmetrical diarylethene bearing a pyridine group, 1-(2-methyl-5-phenyl-3-thienyl)-2-[2-methyl-5-(2-pyri-dyl)-3-thienyl]perfluorocyclopentene (3o ), was synthesised and its structure determined by single-crystal X-ray diffraction analysis. This diarylethene exhibits excellent photochromic properties by alternate irradiation with UV and with visible light. Diarylethene3o dissolved in hexane or embedded in a poly(methyl methacrylate) (PMMA) amorphous film showed good fluorescence switching properties. In the photostationary state, the fluorescence intensity can be quenched to 20% in hexane and to 29% in PMMA.