Triplet state properties of malonic acid C60 derivatives C60 [C(COOR)2] R = H, Et; n = 1-6
Bensasson RV, Berberan-Santos M, Brettreich M, Frederiksen J, Gottinger H, Hirsch A, Land E, Leach S, McGarvey D, Schönberger H, Schröder C (2001)
Publication Type: Journal article, Original article
Publication year: 2001
Journal
Original Authors: Bensasson R.V., Berberan-Santos M.N., Brettreich M., Frederiksen J., Göttinger H., Hirsch A., Land E.J., Leach S., McGarvey D.J., Schönberger H., Schröder C.
Publisher: Royal Society of Chemistry
Book Volume: 3
Pages Range: 4679-4683
Journal Issue: 21
DOI: 10.1039/b105430a
Abstract
Laser flash photolysis and pulse radiolysis have been used to determine properties of the lowest triplet state of a series of water-soluble malonic acid derivatives of C, C[C(COOH)] with n = 2-6, in water at pH 7.4. Similar studies were carried out on the corresponding ethyl esters, C[C(COOEt)] with n = 1-6, in the non-polar solvents, benzene or toluene. The properties include the T-T absorption spectra, the triplet molar absorption coefficients and the quantum yields of formation, Φ and Φ of the triplet and of singlet oxygen, respectively. This study shows a general tendency of the λ of the T-T absorption spectra, and of the Φ values to decrease with increasing number of addends. For regioisomers, the spectroscopic and photophysical parameters are modulated with the pattern of addition. The Φ quantum yields for the acids in aqueous solution are systematically lower than those of the ethyl esters in toluene. The lower Φ values observed for the acids in aqueous solution, and to a lesser extent for the esters in benzonitrile, can be interpreted as due to the presence of solute clusters in polar solvents.
Authors with CRIS profile
Michael Brettreich
Lehrstuhl für Organische Chemie II
Andreas Hirsch
Lehrstuhl für Organische Chemie II
Involved external institutions
France (FR)How to cite
APA:
Bensasson, R.V., Berberan-Santos, M., Brettreich, M., Frederiksen, J., Gottinger, H., Hirsch, A.,... Schröder, C. (2001). Triplet state properties of malonic acid C60 derivatives C60 [C(COOR)2] R = H, Et; n = 1-6. Physical Chemistry Chemical Physics, 3(21), 4679-4683. https://dx.doi.org/10.1039/b105430a
MLA:
Bensasson, René V., et al. "Triplet state properties of malonic acid C60 derivatives C60 [C(COOR)2] R = H, Et; n = 1-6." Physical Chemistry Chemical Physics 3.21 (2001): 4679-4683.
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