Rotamerism in (2-anthryl)ethylenes. Evidence from fluorescence lifetimes and quenching studies

Journal Article · Sun Jan 01 04:00:00 EST 1984 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j150650a029· OSTI ID:5896045

Wismontski-Knittel, T; Das, P K; Fischer, E

The fluorescence decay of trans (2-anthryl)ethylenes containing phenyl, 2-naphthyl, and 2-thienyl groups as the second substituent is biexponential. The decay profiles in benzene are analyzable in terms of two lifetimes in the ranges 6-11 and 17-30 ns, respectively. The complex decay behavior as well as the observation of excitation wavelength dependence of fluorescence spectra, quantum yields, exciplex emission maxima, and fluorescence quenching constants (with oxygen, ethyl iodide (EtI), and N,N-dimethylaniline (DMA) as quenchers) is attributed to the existence of quasi-energetic rotamers in solutions of (2-anthryl)ethylenes. Exciplex lifetimes and transient absorption spectra of radical anions obtained by nanosecond laser flash photolysis in the presence of N,N-dimethylaniline are also presented. 17 references, 6 figures, 6 tables.

• Research Organization: Univ. of Notre Dame, IN
• OSTI ID: 5896045
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 88:6; 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
ALKENES
AROMATICS
BENZENE
CHEMISTRY
DATA
ETHYLENE
EXPERIMENTAL DATA
FLUORESCENCE
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
INFORMATION
LUMINESCENCE
MOTION
NUMERICAL DATA
ORGANIC COMPOUNDS
PHOTOCHEMISTRY
QUENCHING
ROTATION
SPECTRA