Excitation energy transfer in covalently linked pheophorbied—porphyrin systems
✍ Scribed by Mala Raghavan; V. Krishnan
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 537 KB
- Volume
- 205
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
✦ Synopsis
Steady-state fluorescence, lifetime measurements and time-resolved absorption spectra of the covalentty linked heterc dimers consisting of pheophorbide and porphyrin revealed rapid ( 1011-10'2 s-' ) and efficient singlet-singlet excitation energy transfer from porphyrin unit to pheophorbide.
📜 SIMILAR VOLUMES
## Abstract Photophysical properties of a porphyrin‐phthalocyanine heterodimer covalently linked with a dipentoxy chain have been studied. Absorption spectra show that there is weak exciton coupling between the two chromophores in the ground state. Fluorescence spectra show that intramolecular ener
The excited-state lifetimes of three covalently linked and one "face-to-face" hybrid zinc and copper bi\_sporphysm were measured and compared. nleir decays are explained by a triplet energy-transfer mechanism through an exchange coupling. The geometrical structure of these bisporphyrins appears to
Two novel covalently linked chromophore-quencher ruthenium(U) complexes, Ru(bpy),(py-N=CH-An):+ (2; bpy=2,2'bipyridine; py-N=CH-An=C[ (9-anthryl)methyl]imino-pyridine) and Ru(bpy),(py-NH-CH2-An):+ (3; py-NH-CH,-An=4-[ (9-anthryl)methyl]amino-pyridine), along with the "reference" complex Ru(bpy)z(py