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Photophysics and electrochemistry of quinoxaline chromophores decorated with thiophene or furane subunits

Paper ID Volume ID Publish Year Pages File Format Full-Text
27590 44031 2010 6 PDF Available
Title
Photophysics and electrochemistry of quinoxaline chromophores decorated with thiophene or furane subunits
Abstract

The photophysical and the electrochemical behaviour of thienyl and furyl derivatives of quinoxaline and their covalently linked dimers have been studied in solution at room temperature and in glasses at low temperature. The obtained results are compared to those obtained for the 2,3-dimethyl quinoxaline and its 5,5′-dimer. All the compounds show quite negative reduction potentials and, except for the dimers, low fluorescence quantum yields and short lifetimes. The most likely deactivation pathway is through intersystem crossing to the triplet state, as the laser flash photolysis data show. The deactivation of the triplet state is proposed to be accelerated by the thiophene/furane triplet state mixing with that of the quinoxaline.

Keywords
Thiophene; Furane; Quinoxaline; Absorption; Fluorescence; Phosphorescence
First Page Preview
Photophysics and electrochemistry of quinoxaline chromophores decorated with thiophene or furane subunits
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 213, Issues 2–3, 25 June 2010, Pages 101–106
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering