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Issue 15, 2011
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Charge transfer in porphyrin–calixarene complexes: ultrafast kinetics, cyclic voltammetry, and DFT calculations

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Abstract

Transient absorption spectroscopy, cyclic voltammetry, and DFT calculations were used to describe charge transfer processes in a series of 5,10,15,20-tetrakis(N-methylpyridinium-n-yl) porphyrins (TMPyPn, n = 4,3,2) and TMPyPn/p-sulfonatocalix[m]arene (clxm, m = 4,6,8) complexes. Excitation of TMPyPn is accompanied by an increasing electron density at the methylpyridinium substituents in the order TMPyP2 < TMPyP3 < TMPyP4. The quenching of the excited singlet states of the complexes increases with the number of ionized phenolic groups of clxm and can be correlated with the partial transfer of the electron density from O to the peripheral methylpyridinium substituents rather than to the porphyrin ring.

Graphical abstract: Charge transfer in porphyrin–calixarene complexes: ultrafast kinetics, cyclic voltammetry, and DFT calculations

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Article information


Submitted
06 Sep 2010
Accepted
27 Jan 2011
First published
11 Mar 2011

Phys. Chem. Chem. Phys., 2011,13, 6947-6954
Article type
Paper

Charge transfer in porphyrincalixarene complexes: ultrafast kinetics, cyclic voltammetry, and DFT calculations

P. Kubát, J. Šebera, S. Záliš, J. Langmaier, M. Fuciman, T. Polívka and K. Lang, Phys. Chem. Chem. Phys., 2011, 13, 6947
DOI: 10.1039/C0CP01726D

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