LOCATION OF THE LOWEST EVEN PARITY EXCITED SINGLET-STATE IN POLY (P-PHENYLENEVINYLENE) BY 2-PHOTON FLUORESCENCE SPECTROSCOPY

被引：60
作者：
BAKER, CJ
GELSEN, OM
BRADLEY, DDC
机构：
[1] Cavendish Laboratory, Cambridge, CB3 0HE, Madingley Road
来源：
CHEMICAL PHYSICS LETTERS | 1993年 / 201卷 / 1-4期
关键词：
D O I：
10.1016/0009-2614(93)85045-P
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：
We report the two-photon fluorescence excitation spectrum of poly (p-phenylenevinylene) over the energy range 1.1-2.0 eV. The onset for two-photon fluorescence excitation is at 1.3 eV with a strong peak near 1.475 eV. The peak locates the energy of the lowest even parity excited singlet at 2.95 eV, some 0.5 eV above the lowest dipole-allowed singlet transition (the fundamental pi-pi* absorption). This energetic ordering of excited states is in agreement with the predictions of theory and is consistent with the strong one-photon fluorescence seen for this polymer.
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页码：127 / 131
页数：5
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