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Photophysics of 7-mercapto-4-methylcoumarin and Derivatives: Complementary Fluorescence Behaviour to 7-hydroxycoumarins

Anabel E Lanterna, María González-Béjar, Mathieu Frenette, Juan C Scaiano

Photochem Photobiol Sci. 2017 Aug 9;16(8):1284-1289.

PMID: 28650505

Abstract:

The photophysical behaviour of 7-mercapto-4-methylcoumarin (C-SH) and derivatives has been studied in different solvents. In contrast to 7-hydroxy-4-methylcoumarin, C-SH shows poor emission, but high fluorescence when the thiol is alkylated. The origin and character of the lowest singlet states are discussed, specifically proposing that the thione-like C[double bond, length as m-dash]S resonance form plays a key role in excited state deactivation in C-SH.

Chemicals Related in the Paper:

Catalog Number Product Name Structure CAS Number Price
AP137215271 7-Mercapto-4-methylcoumarin 7-Mercapto-4-methylcoumarin 137215-27-1 Price
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