PHOSPHORESCENCE AND S-T ABSORPTION IN VANADYL(IV) TETRAPHENYLPORPHYRIN AT ROOM-TEMPERATURE

Authors
HARIMA Y KODAKA T KUNUGI Y YAMASHITA K AKIMOTO Y FUJIWARA Y TANIMOTO Y
Citation
Y. Harima et al., PHOSPHORESCENCE AND S-T ABSORPTION IN VANADYL(IV) TETRAPHENYLPORPHYRIN AT ROOM-TEMPERATURE, Chemical physics letters, 267(5-6), 1997, pp. 481-484
Citations number
18
Categorie Soggetti
Physics, Atomic, Molecular & Chemical
Journal title
Chemical physics letters → ACNP
ISSN journal
00092614
Volume
267
Issue
5-6
Year of publication
1997
Pages
481 - 484
Database
ISI
SICI code
0009-2614(1997)267:5-6<481:PASAIV>2.0.ZU;2-O
Abstract
Contrary to an early view, vanadyl(IV) tetraphenylporphyrin (VOTPP) in solution and its vacuum-sublimed film at room temperature are found t o be luminescent in the near-infrared. Luminescence lifetimes of VOTPP in chloroform at room temperature and 77 K are evaluated as 60 ns and 2.2 mu s, respectively. In addition, a weak light absorption ascribab le to a singlet-to-triplet excitation is found at 733 nm with a molar extinction coefficient of 5 M(-1) cm(-1).