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Title of Journal: J Fluoresc

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Abbravation: Journal of Fluorescence

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Springer US

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1573-4994

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Spectral Characterization of Thiophene Acylhydrazides

Authors: W. G. Skene, Sergio Andrés Pérez Guarìn,

Publish Date: 2007/06/26
Volume: 17, Issue:5, Pages: 540-546
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Abstract

The spectroscopic properties of a series of new thiophene acylhydrazides were examined. Extremely low fluorescence quantum yields were observed for all these compounds including the hydrazide parent compound and their acylhydrazide homologous polymers. The heteroatoms concomitant with the thiophene sulfurs were responsible for decreasing the singlet-triplet energy level resulting in increased intersystem crossing and low fluorescence emission for the studied compounds. Intramolecular triplet self-quenching from the acylhydrazide bond ultimately deactivates the triplet state by non-emissive means.Financial support from the Natural Sciences and Engineering Research Council Canada, Le Fonds Québécois de la Recherche Sur la Nature et les Technologies, and additional equipment funding from the Canada Foundation for Innovation are greatly acknowledged.


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