Excited state properties of the siderophore pyochelin and its complex with zinc ions

Namiranian, Sholeh, Richardson, David J. ORCID: https://orcid.org/0000-0002-6847-1832, Russell, David A. and Sodeau, John R. (1997) Excited state properties of the siderophore pyochelin and its complex with zinc ions. Photochemistry and Photobiology, 65 (5). pp. 777-782. ISSN 0031-8655

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Abstract

The critical effects of pH on the electronic absorption and fluorescence characteristics of the siderophore, pyochelin, are investigated. A single anionic species is shown to be sufficient to explain the data obtained under alkaline conditions. In acidic solutions, several competing ground- and excited-state equilibria are present, which lead to fluorescence emissions from both the protonated form of pyochelin and its phenolate ion. From the spectroscopic data we are also able to show that pyochelin interacts with zinc ions in the ground state via its anionic form, thereby confirming that this siderophore does not bind Fe(III) ions uniquely.

Item Type: Article
Uncontrolled Keywords: biochemistry,physical and theoretical chemistry ,/dk/atira/pure/subjectarea/asjc/1300/1303
Faculty \ School:
Faculty of Science > School of Biological Sciences
Faculty of Science > School of Chemical Sciences and Pharmacy
Related URLs:
Depositing User: LivePure Connector
Date Deposited: 14 Jul 2022 16:31
Last Modified: 12 Aug 2022 05:35
URI: https://ueaeprints.uea.ac.uk/id/eprint/86134
DOI: 10.1111/j.1751-1097.1997.tb01924.x

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