TIME-RESOLVED RESONANCE RAMAN-SPECTROSCOPY OF EXCITED SINGLET AND TRIPLET-STATES OF FREE-BASE MESO-TETRAPHENYLPORPHYRIN

被引：38

作者：

BELL, SEJ ^{[1
]}

ALOBAIDI, AHR ^{[1
]}

HEGARTY, M ^{[1
]}

HESTER, RE ^{[1
]}

MCGARVEY, JJ ^{[1
]}

机构：

[1] UNIV YORK,DEPT CHEM,YORK YO1 5DD,N YORKSHIRE,ENGLAND

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1993年 / 97卷 / 45期

关键词：

D O I：

10.1021/j100147a007

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Two-color time-resolved resonance Raman spectroscopy has been used to probe the lowest excited singlet (S1) and triplet (T1) states of free-base meso-tetraphenylporphyrin and meso-tetrakis(4-sulphonatophenyl)porphyrin in solution at room temperature. The spectra were recorded using 532-nm excitation pulses and time-delayed probe pulses (DELTAT = 0-30 ns, 447 and 460 nm) near lambda(max) of the S1 and T1 states. Significant shifts in frequency of the porphyrin core vibrations were observed upon excitation to either the S1 or T1 state. Several of the strongest polarized bands in the spectra of both excited states, including nu1, nu2, nu4, nu6, and phi4, are assigned, and the information they give on the differences in electron distribution in the ground, S1, and T1 states is discussed.

引用

页码：11599 / 11602

页数：4

共 17 条

[11]

ROBERTS JE, 1987, SPIE J, V847, P134

[12] OPTICAL-PROPERTIES OF METALLOPORPHYRIN EXCITED-STATES [J].