Photophysical and photochemical processes of 9,10-dihydro-9-silaanthracenes: photochemical generation and electronic structure of 9-phenyl-9-silaanthracene

• Published in: Journal of organometallic chemistry Vol. 611; no. 1; pp. 71 - 77
• Main Authors: Hiratsuka, Hiroshi, Tanaka, Miéko, Horiuchi, Hiroaki, Naris, Yoshinaga, Tetsutaro, Oba, Makoto, Nishiyama, Kozaburo
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 06-10-2000
• Subjects: 9-Phenyl-9-silaanthracene; Dihydro-9-silaanthracene; Electronic structure; Photolysis; Photophysical process; 9-Phenyl-9-silaanthracene; Electronic structure; Photolysis; Photophysical process; Dihydro-9-silaanthracene
• ISSN: 0022-328X; 1872-8561
• DOI: 10.1016/S0022-328X(00)00298-9

Photophysical processes of 9,10-dihydro-9-silaanthracene (
1) and its 9-phenyl derivative (
2) have been studied in 3-methylpentane at 77 K. Photolyses of these compounds have been carried out at 77 K and reaction intermediates have been studied. Carbon-centered radicals and silylenes have been observed for
1, while for
2, formation of carbon-centered radicals and 9-phenyl-9-silaanthracene has been confirmed by use of UV–vis absorption spectrum, fluorescence spectrum, fluorescence polarization and results of semi-empirical MO calculations. The electronic structure of 9-silaanthracene has been discussed in comparison with that of anthracene.