Issue 2, 2012
From the journal:

Photochemical & Photobiological Sciences

Unexpected solvent isotope effect on the triplet lifetime of methylene blue associated to cucurbit[7]uril†

Emilio I. Alarcon,*a   María González-Béjar,a   Pedro Montes-Navajas,b   Hermenegildo Garcia,b   Eduardo A. Lissic  and  Juan C. Scaiano*a  

* Corresponding authors

a Department of Chemistry and Centre for Catalysis Research and Innovation, University of Ottawa, 10, Marie Curie, Ottawa, Ontario, Canada
E-mail: emilio@photo.chem.uottawa.ca, tito@photo.chem.uottawa.ca
Fax: (+1) 613-562-5170
Tel: (+1) 613-562-5728

b Instituto de Tecnología Química CSIC-UPV, Universidad Politécnica de Valencia, Valencia, Spain

c Departamento de Ciencias del Ambiente, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile

Abstract

Methylene blue shows an isotope dependent triplet lifetime that is 50% longer in D2O compared with H2O as a result of electronic-to-vibrational relaxation. The effect is enhanced when the dye is bound to curcubit[7]uril due to a combination of restricted mobility and a unfavorable vibrational coupling.

Graphical abstract: Unexpected solvent isotope effect on the triplet lifetime of methylene blue associated to cucurbit[7]uril

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Article information

DOI
https://doi.org/10.1039/C1PP05227F
Article type
Communication
Submitted
17 Jul 2011
Accepted
22 Sep 2011
First published
25 Oct 2011

Photochem. Photobiol. Sci., 2012,11, 269-273

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Unexpected solvent isotope effect on the triplet lifetime of methylene blue associated to cucurbit[7]uril

E. I. Alarcon, M. González-Béjar, P. Montes-Navajas, H. Garcia, E. A. Lissi and J. C. Scaiano, Photochem. Photobiol. Sci., 2012, 11, 269 DOI: 10.1039/C1PP05227F

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