Coumarin-based luminescent ligand that forms helicates with dicationic metal ions

Bullock, Sam J., Felton, Cara E., Fennessy, Rebecca V., Harding, Lindsay P., Andrews, Michael Bryan, Pope, Simon J. A. ORCID: https://orcid.org/0000-0001-9110-9711, Rice, Craig R. and Riis-Johannessen, T. 2009. Coumarin-based luminescent ligand that forms helicates with dicationic metal ions. Dalton Transactions (47) , pp. 10570-10573. 10.1039/b913103e

Full text not available from this repository.

Abstract

The potentially hexadentate ligand L, which contains two terminal coumarin fluorophores, forms dinuclear double-stranded helicates with dicationic metal ions, giving species of the generic form [M2L2]4+. In solution the free ligand was fluorescent with emission attributed to the coumarin fluorophores (λem = 437 nm). The luminescent properties of the corresponding dimetallic helicates complexes were examined and revealed that the Zn2+ complex demonstrates enhanced emission when compared to the parent ligand, whereas Co2+, Cu2+, Cd2+ and Hg2+ induce varying degrees of fluorescence quenching. In particular, comparative luminescence measurements at 77 K and room temperature showed that the quenching mechanism for [Cu2L2]4+ can be attributed to a photoinduced electron transfer. ESI-MS selectivity studies showed that in the presence of a mixture of metal dications no preference for any one metal ion was observed.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Chemistry
Subjects:	Q Science > QD Chemistry
Publisher:	RSC
ISSN:	1477-9226
Last Modified:	18 Oct 2022 13:16
URI:	https://orca.cardiff.ac.uk/id/eprint/13267

Citation Data

Cited 25 times in Scopus. View in Scopus. Powered By Scopus® Data

Actions (repository staff only)

Edit Item