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

Journal Article · Thu Jul 08 04:00:00 EDT 1993 · Journal of Physical Chemistry; (United States)

DOI:https://doi.org/10.1021/j100129a017· OSTI ID:5620630

Fonda, H N; Gilbert, J V; Cormier, R A; Sprague, J R; Kamioka, Keiko; Connolly, J S ^[1]

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1. National Renewable Energy Lab., Golden, CO (United States)

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.

• OSTI ID: 5620630
• Journal Information: Journal of Physical Chemistry; (United States), Journal Name: Journal of Physical Chemistry; (United States) Vol. 97:27; ISSN JPCHAX; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140505 -- Solar Energy Conversion-- Photochemical
Photobiological
& Thermochemical Conversion-- (1980-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
400500 -- Photochemistry
ABSORPTION SPECTROSCOPY
CARBOXYLIC ACIDS
CHEMICAL REACTIONS
DATA
EMISSION SPECTROSCOPY
EXPERIMENTAL DATA
FLUORESCENCE SPECTROSCOPY
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
INFORMATION
MOLECULAR STRUCTURE
NMR SPECTRA
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOSYNTHESIS
PHYSICAL PROPERTIES
PORPHYRINS
REDOX REACTIONS
SPECTRA
SPECTROSCOPY
SYNTHESIS
THEORETICAL DATA