Abstract
Excited-state dynamics of copper(II) tetraphenylporphyrin left bracket Cu(TPP) right bracket and copper(II) etioporphyrin left bracket Cu(Etio) right bracket depends dramatically on the coordinating properties of the solvent system. Relaxation of transient absorption and recovery of ground-state bleaching following excitation with 35-ps flashes at 355 nm range from greater than 10 ns in the noncoordinating solvent, toluene, to approx. 100 ps in the coordinating solvent, piperidine. Lifetimes of intermediate duration are observed in toluene/piperidine mixtures; for Cu(TPP) the time constants are 650 ps and 2. 1 ns in 1 and 0. 3 M piperidine, respectively. Analogous results are found for Cu(Etio) and in pyridine. Despite such variation in kinetic behavior, transient difference spectra observed for both Cu porphyrins are essentially independent of solvent.
| Original language | English |
|---|---|
| Pages (from-to) | 2793-2798 |
| Number of pages | 6 |
| Journal | Journal of the American Chemical Society |
| Volume | 106 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 1984 Jan 1 |
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All Science Journal Classification (ASJC) codes
- Catalysis
- Chemistry(all)
- Biochemistry
- Colloid and Surface Chemistry
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EVIDENCE FROM PICOSECOND TRANSIENT ABSORPTION AND KINETIC STUDIES OF CHARGE-TRANSFER STATES IN COPPER(II) PORPHYRINS. / Kim, Dongho; Holten, Dewey; Gouterman, Martin.
In: Journal of the American Chemical Society, Vol. 106, No. 10, 01.01.1984, p. 2793-2798.Research output: Contribution to journal › Article
TY - JOUR
T1 - EVIDENCE FROM PICOSECOND TRANSIENT ABSORPTION AND KINETIC STUDIES OF CHARGE-TRANSFER STATES IN COPPER(II) PORPHYRINS.
AU - Kim, Dongho
AU - Holten, Dewey
AU - Gouterman, Martin
PY - 1984/1/1
Y1 - 1984/1/1
N2 - Excited-state dynamics of copper(II) tetraphenylporphyrin left bracket Cu(TPP) right bracket and copper(II) etioporphyrin left bracket Cu(Etio) right bracket depends dramatically on the coordinating properties of the solvent system. Relaxation of transient absorption and recovery of ground-state bleaching following excitation with 35-ps flashes at 355 nm range from greater than 10 ns in the noncoordinating solvent, toluene, to approx. 100 ps in the coordinating solvent, piperidine. Lifetimes of intermediate duration are observed in toluene/piperidine mixtures; for Cu(TPP) the time constants are 650 ps and 2. 1 ns in 1 and 0. 3 M piperidine, respectively. Analogous results are found for Cu(Etio) and in pyridine. Despite such variation in kinetic behavior, transient difference spectra observed for both Cu porphyrins are essentially independent of solvent.
AB - Excited-state dynamics of copper(II) tetraphenylporphyrin left bracket Cu(TPP) right bracket and copper(II) etioporphyrin left bracket Cu(Etio) right bracket depends dramatically on the coordinating properties of the solvent system. Relaxation of transient absorption and recovery of ground-state bleaching following excitation with 35-ps flashes at 355 nm range from greater than 10 ns in the noncoordinating solvent, toluene, to approx. 100 ps in the coordinating solvent, piperidine. Lifetimes of intermediate duration are observed in toluene/piperidine mixtures; for Cu(TPP) the time constants are 650 ps and 2. 1 ns in 1 and 0. 3 M piperidine, respectively. Analogous results are found for Cu(Etio) and in pyridine. Despite such variation in kinetic behavior, transient difference spectra observed for both Cu porphyrins are essentially independent of solvent.
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U2 - 10.1021/ja00322a012
DO - 10.1021/ja00322a012
M3 - Article
AN - SCOPUS:0021432441
VL - 106
SP - 2793
EP - 2798
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
SN - 0002-7863
IS - 10
ER -