A TIME-RESOLVED ESR STUDY ON TRIPLET-TRIPLET ENERGY-TRANSFER PROCESSES IN A COPPER(II)-FREE-BASE PORPHYRIN DIMER

Authors
ASANOSOMEDA M ICHINO T KAIZU Y
Citation
M. Asanosomeda et al., A TIME-RESOLVED ESR STUDY ON TRIPLET-TRIPLET ENERGY-TRANSFER PROCESSES IN A COPPER(II)-FREE-BASE PORPHYRIN DIMER, Coordination chemistry reviews, 132, 1994, pp. 243-248
Citations number
5
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Coordination chemistry reviews → ACNP
ISSN journal
00108545
Volume
132
Year of publication
1994
Pages
243 - 248
Database
ISI
SICI code
0010-8545(1994)132:<243:ATESOT>2.0.ZU;2-2
Abstract
Energy transfer from a copper porphyrin moiety to its free-base partne r is observed in a copper(II)-free-base hybrid porphyrin dimer. By the measurements of T-T transient absorption spectra in toluene, the trip let yield of the free-base porphyrin was found to be increased in the hybrid dimer compared with that in a monomeric free-base porphyrin. Ti me-resolved ESR study revealed that this intramolecular energy transfe r occurs between the triplets. From the simulation of the TR-ESR spect rum, the mean value of the dihedral angle between the donor and the ac ceptor is estimated as 30 degrees.