Relaxations of the Second Excited State of Zinc Tetraphenylporphyrin Probed by Spectral Hole Burning in the Soret Absorption Band: Electron Transfer versus Internal Conversion

1995 ◽  
Vol 99 (35) ◽  
pp. 13163-13167 ◽  
Author(s):  
Martin Vacha ◽  
Shinjiro Machida ◽  
Kazuyuki Horie
Keyword(s):  
Electron Transfer ◽  
Excited State ◽  
Absorption Band ◽  
Internal Conversion ◽  
Hole Burning ◽  
Spectral Hole Burning ◽  
Band Electron ◽  
Spectral Hole ◽  
Soret Absorption

Transient spectral hole-burning in the S0→S1 absorption band of anthracene in a polymethylmethacrylate matrix

1990 ◽  
Vol 144 (1) ◽  
pp. 129-145 ◽  
Author(s):  
Michael Lindrum ◽  
Bernhard Nickel
Keyword(s):  
Absorption Band ◽  
Hole Burning ◽  
Spectral Hole Burning ◽  
Spectral Hole

Redox equilibrium and spectral hole burning in Sm2+-doped Al2O3–SiO2 glasses

2002 ◽  
Vol 17 (8) ◽  
pp. 2053-2058 ◽  
Author(s):  
Masayuki Nogami ◽  
Toyonori Eto ◽  
Kazuhiro Suzuki ◽  
Tomokatsu Hayakawa
Keyword(s):  
Electron Transfer ◽  
Sol Gel ◽  
Hole Burning ◽  
Spectral Hole Burning ◽  
Oxygen Defect ◽  
Redox Equilibrium ◽  
Defect Center ◽  
X Ray ◽  
Spectral Hole ◽  
Gel Glasses

Sm2+ ion-doped Al2O3–SiO2 glasses were prepared using sol-gel and melt-quenching methods; the redox equilibrium and spectral hole burning were investigated. The Sm3+ ions were reduced into Sm2+ by heating in H2 gas or x-ray irradiation. The redox between the Sm3+ and Sm2+ obeyed first-order kinetics, the rate of which was larger for the sol-gel glasses. The Sm3+ ions were also reduced by x-ray irradiation and the activation energy for redox equilibrium was half of that for the glasses treated in H2 gas. Two different mechanisms were proposed for the redox reaction of the samarium ions. In the x-ray irradiated glasses, the Sm3+ ions were reduced into Sm2+ by electron transfer from the oxygen defect center, whereas the H2-gas reaction removed the oxygen ions to reduce the Sm3+ ions. The spectral hole burning of the x-ray-irradiated glasses could be burned by the reverse reaction of the reduction of the Sm3+ ions; that is, the electron transfer from the excited Sm2+ into the surrounding oxygen. A short distance between the Sm2+ and oxygen defect centers allowed fast hole burning. On the other hand, the hole burning in the H2-treated glasses was performed by electron transfer between Sm2+ and another trapping center such as Sm3+.

Photon-gated spectral hole burning by donor-acceptor electron transfer

1987 ◽  
Vol 12 (5) ◽  
pp. 370 ◽  
Author(s):  
T. P. Carter ◽  
C. Bräuchle ◽  
V. Y. Lee ◽  
M. Manavi ◽  
W. E. Moerner
Keyword(s):  
Electron Transfer ◽  
Hole Burning ◽  
Spectral Hole Burning ◽  
Spectral Hole ◽  
Donor Acceptor

Room temperature spectral hole burning and electron transfer in Sm-doped aluminosilicate glasses

1999 ◽  
Vol 86 (10) ◽  
pp. 5619-5623 ◽  
Author(s):  
Hongwei Song ◽  
Tomokatsu Hayakawa ◽  
Masayuki Nogami
Keyword(s):  
Electron Transfer ◽  
Room Temperature ◽  
Hole Burning ◽  
Spectral Hole Burning ◽  
Aluminosilicate Glasses ◽  
Spectral Hole

scholarly journals A New Persistent Photon-Gated Spectral Hole-Burning System: Zinc Tetraphenylporphyrin Linked to Polyvinylbenzylchloride-Co-Polystyrene

1996 ◽  
Vol 16 (4) ◽  
pp. 219-228 ◽  
Author(s):  
S. Salhi ◽  
S. Kulikov ◽  
C. Bied-Charreton ◽  
J. P. Galaup
Keyword(s):  
Electron Transfer ◽  
Hole Burning ◽  
Spectral Hole Burning ◽  
Hole Formation ◽  
Spectral Hole ◽  
Donor Acceptor

Two colour photon-gated persistent spectral hole-burning via donor-acceptor electron transfer is reported in systems where the donor: zinc tetraphenylporphyrin (ZnTPP) and the acceptor: vinylbenzylchloride where linked to a polystyrene chain. A spectral hole is observed when the sample is irradiated using a gating light in addition to the wavelength-selective light. No effect of the gating light has been observed for ZnTPP dispersed in polystyrene (PS) even with efficient acceptors. In contrast, the efficiency of hole formation under two colour excitation is four times larger than that under one colour excitation in ZnTPP-PBCS/PMMA and nearly two times larger in ZnTPP-PBCS/PS.

Persistent spectral-hole burning in SiC:V via excited-state absorption

1998 ◽  
Vol 76-77 ◽  
pp. 95-99 ◽  
Author(s):  
C. Hecht ◽  
R. Kummer ◽  
A. Winnacker
Keyword(s):  
Excited State ◽  
Excited State Absorption ◽  
Hole Burning ◽  
Spectral Hole Burning ◽  
Spectral Hole
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