Spectroscopic, photophysical, and redox properties of some meso-substituted free-base porphyrins

Autor:	H. N. Fonda, Julanna V. Gilbert, J. R. Sprague, Keiko Kamioka, Russell A. Cormier, John S. Connolly
Rok vydání:	1993
Předmět:	Absorption spectroscopy General Engineering Fluorescence spectrometry Dihedral angle Photochemistry Porphyrin Fluorescence spectroscopy NMR spectra database Electron transfer chemistry.chemical_compound chemistry Molecule Physical chemistry Physical and Theoretical Chemistry
Zdroj:	The Journal of Physical Chemistry. 97:7024-7033
ISSN:	1541-5740 0022-3654
Popis:	Spectroscopic and photophysical properties of unsubstituted free-based porphine and several symmetric meso-tetraalkyl- and meso-tetraarylporphyrins have been studied. Detailed analyses of absorption and fluorescence spectra, fluorescence lifetimes and quantum yields, and [sup 1]H NMR spectra, as well as molar extinction coefficients and redox potentials, are reported. The experimental data are correlated with trends in the structural features of these molecules predicted by molecular mechanics calculations, including planarity of the macrocycles and the dihedral angles about the meso C-C bond. Conclusions concerning the role of excited-state lifetimes of some of the aryl-substituted porphyrins are presented. The significance of these results is discussed in terms of light-induced electron transfer in covalently linked porphyrin-containing assemblies. 36 refs., 4 figs., 9 tabs.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6215506133ffc53748bd2def9db9c2d5 https://doi.org/10.1021/j100129a017 Zobrazit plný text záznamu