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Optical switching and fluorescence modulation properties of photochromic dithienylethene derivatives

Paper ID Volume ID Publish Year Pages File Format Full-Text
29280 44143 2007 7 PDF Available
Title
Optical switching and fluorescence modulation properties of photochromic dithienylethene derivatives
Abstract

Fluorescent photoswitching molecules in which photochromic diarylethene with terpyridine units (tpy) attached via a phenylene linker to the thiophene rings were synthesized. Both compounds exhibited pronounced photochromic properties. Irradiation of the open form of compounds 1 and 2 with UV light resulted in immediate photocyclization to the blue closed form; the colorless open forms could be regenerated by irradiation with visible light. In terms of potential use for optical data storage and readout, compounds 1 and 2 display fluorescence discrimination between their open and closed form. This fluorescence switching could be the basis of a nondestructive readout method. And the complexation of these two compounds with metal ions was also studied. It is amazing to find the addition of Zn2+ lead the emission wavelengths of 2a red shift up to 105 nm. This unique phenomenon makes the compound 2a, a candidate for the chemical sensor for zinc.

Keywords
Diarylethene; Photochromism; Fluorescence switching; Metal ions
First Page Preview
Optical switching and fluorescence modulation properties of photochromic dithienylethene derivatives
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 189, Issues 2–3, 25 June 2007, Pages 307–313
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering