Constrained complexes of manganese(II) tetraphenylporphyrin in rigid solution
Journal Article
·
· J. Phys. Chem.; (United States)
Optical absorption and ESR spectra revealed that chloro- and bromo(tetraphenylporphyrin)manganese(III) (ClMn/sup III/TPP and BrMn/sup III/TPP) in 2-methyltetrahydrofuran (MTHF) solution were reduced to Mn/sup/II/TPP at 77/sup 0/K by ..gamma.. irradiation. The Mn/sup II/TPP species derived from ClMn/sup III/TPP and BrMn/sup III/TPP were found to be different from each other and also from a chemically prepared Mn/sup II/TPP in their absorption and ESR spectra, although all of the Mn/sup II/TpPP species were in the high-spin state (S = 5/2). These spectroscopic data are interpreted in terms of the formation through electron capture during irradiation of constrained complexes of Mn/sup II/TPP in which Mn/sup II/TPP is forced to retain the halide ions in the axial position because of the rigidity of the low-temperature solvent matrix. On the other hand, the chemically prepared Mn/sup II/TPP is regarded as having a solvent molecule weakly coordinating in the axial position.
- Research Organization:
- Inst. of Physical and Chemical Research, Saitama, Japan
- OSTI ID:
- 6538691
- Journal Information:
- J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 86:8; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
14 SOLAR ENERGY
140505 -- Solar Energy Conversion-- Photochemical
Photobiological
& Thermochemical Conversion-- (1980-)
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
ABSORPTION SPECTRA
CARBOXYLIC ACIDS
CATALYTIC EFFECTS
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
COMPLEXES
DATA
ELECTROMAGNETIC RADIATION
ELECTRON SPIN RESONANCE
EXPERIMENTAL DATA
GAMMA RADIATION
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
INFORMATION
IONIZING RADIATIONS
MAGNETIC RESONANCE
MANGANESE COMPLEXES
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PORPHYRINS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
REDOX REACTIONS
RESONANCE
SPECTRA
TRANSITION ELEMENT COMPLEXES
140505 -- Solar Energy Conversion-- Photochemical
Photobiological
& Thermochemical Conversion-- (1980-)
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
ABSORPTION SPECTRA
CARBOXYLIC ACIDS
CATALYTIC EFFECTS
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
COMPLEXES
DATA
ELECTROMAGNETIC RADIATION
ELECTRON SPIN RESONANCE
EXPERIMENTAL DATA
GAMMA RADIATION
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
INFORMATION
IONIZING RADIATIONS
MAGNETIC RESONANCE
MANGANESE COMPLEXES
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PORPHYRINS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
REDOX REACTIONS
RESONANCE
SPECTRA
TRANSITION ELEMENT COMPLEXES