Proximity effect in molecular photophysics: dynamical consequences of Pseudo-Jahn-Teller interaction

Journal Article · Thu Dec 18 04:00:00 EST 1986 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100284a012· OSTI ID:6903504

Lim, E C

The authors present here photophysical properties of nitrogen-heterocyclic and aromatic carbonyl compounds that can be attributed to vibronic coupling between nearby n..pi..* and ..pi pi..* states (proximity effect). These compounds often exhibit luminescence (fluorescence and/or phosphorescence) that is strongly dependent upon temperature, the nature of the solvent, chemical substitution, and the position of the deuterium substitution. Many of these complexities can be traced to the vibronic interaction between close-lying n..pi..* and ..pi pi..* states, which leads to a large increase in the nonradiative decay rate of the lowest excited state. This phenomenon, which they have termed proximity effect, has been a subject of extensive studies in recent years, and there is now compelling evidence that the photophysical behavior of the lowest excited state in these molecular is strongly influenced by the proximity effect.

• Research Organization: Wayne State Univ., Detroit, MI
• OSTI ID: 6903504
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 90:26; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500* -- Photochemistry
CHEMISTRY
COUPLING
DE-EXCITATION
DOCUMENT TYPES
ENERGY LEVELS
ENERGY TRANSFER
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
JAHN-TELLER EFFECT
MECHANICS
MOLECULAR STRUCTURE
PHOTOCHEMISTRY
QUANTUM MECHANICS
RADIATIONLESS DECAY
REVIEWS
ROTATIONAL STATES
VIBRATIONAL STATES