The lowest triplet state of pyrimidine in a crystalline host at 1.2 K. Total phosphorescence and Tx sublevel excitation spectra

Total phosphorescence and Tx sublevel excitation spectra of pyrimidine in benzene and cyclohexane are reported. With increasing excitation energy absorption into the1B1 nπ* vibronic ladder leads to an increase of the populating rate of Ty, Tz relative to Tx. For pyrimidine in benzene (p-xylene) a se...

Full description

Saved in:
Bibliographic Details
Published inChemical physics letters Vol. 92; no. 6; pp. 588 - 594
Main Authors Nonhof, C.J., Van Der Waals, J.H.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 12.11.1982
Online AccessGet full text

Cover

More Information
Summary:Total phosphorescence and Tx sublevel excitation spectra of pyrimidine in benzene and cyclohexane are reported. With increasing excitation energy absorption into the1B1 nπ* vibronic ladder leads to an increase of the populating rate of Ty, Tz relative to Tx. For pyrimidine in benzene (p-xylene) a second electronic origin is observed 2416 (2260) cm−1 above the S1 S0 00 band and assigned to1A2 nπ*. The spin-orbit coupling mechanism that accounts for the intersystem crossing into Tx is discussed.
ISSN:0009-2614
1873-4448
DOI:10.1016/0009-2614(82)83655-5