Temperature dependence of the triplet lifetime of pyrazine

Journal Article · Thu Aug 28 04:00:00 EDT 1986 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100409a014· OSTI ID:5424830

Terazima, M; Yamauchi, S; Hirota, N

Very large temperature dependence of the triplet lifetime of pyrazine was observed in various solid solutions and is interpreted in terms of the increased radiationless decay rate of the thermally populated higher triplet states. The excess energy dependence of the decay rate is estimated from the simulation of the observed temperature dependence. It is suggested that the excess energy dependence of the decay rate constant is not smooth but abrupt, and this is brought by the n..pi..-..pi pi.. vibronic interaction. Evidence to support this suggestion is provided by the solvent dependence of the phosphorescence excitation spectrum.

• Research Organization: Kyoto Univ., Japan
• OSTI ID: 5424830
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 90:18; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
400500 -- Photochemistry
ARRHENIUS EQUATION
AZINES
CHEMICAL REACTION KINETICS
CHEMISTRY
DATA
ENERGY LEVELS
EQUATIONS
EXPERIMENTAL DATA
HETEROCYCLIC COMPOUNDS
INFORMATION
KINETICS
LIFETIME
LUMINESCENCE
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
P STATES
PHOSPHORESCENCE
PHOTOCHEMISTRY
PYRAZINES
REACTION KINETICS
TEMPERATURE DEPENDENCE