Open AccessTime-Resolved Resonance Raman Spectroscopy of Excited-State Porphyrins
Author(s) -
Steven E. J. Bell,
James H. Rice,
John J. McGarvey,
Ronald E. Hester,
John N. Moore,
Robin N. Perutz,
T.-Q. Ye,
Yasuhisa Mizutani,
Teizo Kitagawa
Publication year - 1999
Publication title -
laser chemistry
Language(s) - English
Resource type - Journals
eISSN - 1026-8014
pISSN - 0278-6273
DOI - 10.1155/1999/82824
Subject(s) - chemistry , excited state , raman spectroscopy , resonance raman spectroscopy , pyridine , resonance (particle physics) , photochemistry , ground state , absorbance , spectroscopy , excitation , analytical chemistry (journal) , atomic physics , optics , organic chemistry , physics , chromatography , quantum mechanics , electrical engineering , engineering
Time-resolved resonance Raman (TR3) and absorbance difference studies of the excited states of Cu(TPP) (TPP=5,10,15,20-tetraphenylporphyrin) have been carried out with < 10 ps times resolution in THF and pyridine solvents. In THF the distinctive transient Raman bands in the ν2 and ν4 regions, previously observed with ns laser pulses, grow in the first 55 ps before decaying in 100's of ps. The ∆A spectra also show biphasic decay. This behaviour is associated with attack by solvent on the 4-coordinate excited state to form the longer lived species observed in TR3 experiments.
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom