The University of Southampton
University of Southampton Institutional Repository

Influence of lanthanide(III) ions on the reaction system tryptophan - H2O2-Fe(II)

Record type: Article

Chemiluminescence (CL) studies were carried out with luminescent lanthanide ions as probes to a tryptophan-oxidation reaction at pH ? 6. The redox system consisted of tryptophan, hydrogen peroxide, and Fe(II) ions (catalysts of H2O2 decomposition). The luminescent lanthanide(III) ions used were Eu(III), Tb(III), Gd(III), and Dy(III). In the case of the reaction system with the Tb(III) ion a significant increase in the chemiluminescence intensity and its duration was observed over the other Ln(III) ions. The CL spectrum registered for this system shows emission bands typical of Tb(III) ions with maxima at ?? 490 and 550 nm, corresponding to the electronic transitions of 5D4?7F6 and 5D4?7F5, respectively. The presence of emission bands characteristic of the Ln(III) ions was also observed in the systems containing Eu(III) and Dy(III) ions. These studies revealed a strong influence of the chemiluminescence intensity associated with the tryptophan oxidation, on the concentration of Ln(III) ions. On the basis of the results obtained, a possible mechanism is proposed for reaction of the systemml: Ln(III)—tryptophan—H2O2–Fe(II), taking into consideration an energy transfer process from the tryptophan oxidation products to the Tb(III), Dy(III), or Eu(III) ions.

Full text not available from this repository.

Citation

Kaczmarek, M. and Lis, S. (2007) Influence of lanthanide(III) ions on the reaction system tryptophan - H2O2-Fe(II) International Journal of Photoenergy, (42582) (doi:10.1155/2007/42582).

More information

Published date: 2007

Identifiers

Local EPrints ID: 57325
URI: http://eprints.soton.ac.uk/id/eprint/57325
ISSN: 1110-662X
PURE UUID: 0cbfbefe-bfda-43b2-a28d-b8de6ad163dc

Catalogue record

Date deposited: 07 Aug 2008
Last modified: 17 Jul 2017 14:29

Export record

Altmetrics

Contributors

Author: M. Kaczmarek
Author: S. Lis

University divisions


Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×