Photophysics of 7-mercapto-4-methylcoumarin and derivatives: complementary fluorescence behaviour to 7-hydroxycoumarins

Lanterna, Anabel E.; Gonz�lez-B�jar, Mar�a; Frenette, Mathieu; Scaiano, Juan C.

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.

Citation

Lanterna, A. E., González-Béjar, M., Frenette, M., & Scaiano, J. C. (2017). Photophysics of 7-mercapto-4-methylcoumarin and derivatives: complementary fluorescence behaviour to 7-hydroxycoumarins. Photochemical & Photobiological Sciences Photochemical and Photobiological Sciences, 16(8), 1284-1289. https://doi.org/10.1039/c7pp00121e

• Journal Article Type: Article
• Acceptance Date: Jun 15, 2017
• Online Publication Date: Jun 15, 2017
• Publication Date: Aug 1, 2017
• Deposit Date: Jun 22, 2020
• Journal: Photochemical & Photobiological Sciences
• Print ISSN: 1474-905X
• Electronic ISSN: 1474-9092
• Publisher: Royal Society of Chemistry
• Peer Reviewed: Peer Reviewed
• Volume: 16
• Issue: 8
• Pages: 1284-1289
• DOI: https://doi.org/10.1039/c7pp00121e
• Public URL: https://nottingham-repository.worktribe.com/output/4442839
• Publisher URL: https://pubs.rsc.org/en/content/articlelanding/2017/PP/C7PP00121E#!divAbstract
• Additional Information: : This document is Similarity Check deposited; : Supplementary Information; : Anabel E. Lanterna (ORCID); : Anabel E. Lanterna (ResearcherID); : María González-Béjar (ORCID); : María González-Béjar (ResearcherID); : Mathieu Frenette (ORCID); : Mathieu Frenette (ResearcherID); : Juan C. Scaiano (ORCID); : The Royal Society of Chemistry and the partner society(ies) have an exclusive publication licence for this journal; : Single-blind; : Received 1 April 2017; Accepted 15 June 2017; Accepted Manuscript published 15 June 2017; Advance Article published 26 June 2017; Version of Record published 9 August 2017