Issue 30, 2005
From the journal:

Journal of Materials Chemistry

Synthesis and spectroscopy of coumarin derivatives for saxitoxin detection†

Jhony Orbulescu,a   Péter Kele,b   András Kotschyb  and  Roger M. Leblanc*a  

* Corresponding authors

a University of Miami, Department of Chemistry, 1301 Memorial Drive, Coral Gables, FL 33124, USA
E-mail: rml@miami.edu
Fax: 1 305 284 6367
Tel: 1 305 284 2194

b Eötvös Loránd University, Department of General and Inorganic Chemistry, H-1117 Budapest, Pázmány Péter s. 1/A, Hungary

Abstract

This paper focuses on the examination of the Photoinduced Electron Transfer (PET) and Internal Charge Transfer (ICT) for two coumarin derivatives, namely 7-methoxycoumarin-4-methyl-1-aza-18-crown-6 and di(7-methoxycoumarin-4-methyl)-1,10-diaza-18-crown-6. The spectroscopic properties were investigated by UV-Vis and fluorescence spectroscopies. It was found that a dual mechanism explains the fluorescence enhancement and blue shift in the presence of a cationic species, namely saxitoxin. The ICT was elucidated by the polarity effect of methanol on the fluorescence of di(7-methoxycoumarin-4-methyl)-1,10-diaza-18-crown-6.

Graphical abstract: Synthesis and spectroscopy of coumarin derivatives for saxitoxin detection

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Article information

DOI
https://doi.org/10.1039/B501510C
Article type
Paper
Submitted
01 Jan 2005
Accepted
12 May 2005
First published
08 Jul 2005

J. Mater. Chem., 2005,15, 3084-3088

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Synthesis and spectroscopy of coumarin derivatives for saxitoxin detection

J. Orbulescu, P. Kele, A. Kotschy and R. M. Leblanc, J. Mater. Chem., 2005, 15, 3084 DOI: 10.1039/B501510C

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