Charge-transfer interactions in 1-cyanonaphthalene van der Waals complexes with aliphatic amines: Dependence of excited-state dynamics on donor ionization potential

Journal Article · Thu Oct 03 04:00:00 EDT 1991 · Journal of Physical Chemistry; (United States)

DOI:https://doi.org/10.1021/j100173a006· OSTI ID:7273626

Saigusa, Hiroyuki; Lim, E C ^[1]

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1. Univ. of Akron, OH (United States)

The exciplex formation reaction that occurs within the initially excited van der Waals complexes of 1-cyanonaphthalene with a variety of aliphatic amines has been studied as a function of the ionization potential (IP) of the amines and the excess vibrational energy of the electronically excited complexes. In all cases, the fluorescence excitation spectra are composed of only narrow-band features originating from local excitations of the acceptor chromophore. While complexes involving amines of high IP are inefficient in producing exciplexes, those with amines of low IP give rise to exciplex fluorescence from the charge-transfer state. The tributylamine complex, unlike the others, undergoes the exciplex formation upon excitation into its S{sub 1} origin. These results are interpreted in terms of the crossing of the initially excited van der Waals state and the charge-transfer state.

• OSTI ID: 7273626
• Journal Information: Journal of Physical Chemistry; (United States), Journal Name: Journal of Physical Chemistry; (United States) Vol. 95:20; ISSN 0022-3654; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500* -- Photochemistry
AMINES
AROMATICS
CHEMISTRY
CONDENSED AROMATICS
EMISSION SPECTROSCOPY
ENERGY LEVELS
EXCITED STATES
FLUORESCENCE SPECTROSCOPY
IONIZATION POTENTIAL
ORGANIC COMPOUNDS
PHOTOCHEMISTRY
SPECTROSCOPY
VAN DER WAALS FORCES
VIBRATIONAL STATES