Excited state absorption spectra and intersystem crossing kinetics in the naphthaldehydes

Picosecond time resolved, excited state absorption spectra following excitation at 355 nm are reported for 1-naphthaldehyde (1-NA) and 2-naphthaldehyde (2-NA) in room temperature solutions. The kinetics of the lowest excited singlet state (S1) decay are determined for each. The S1 lifetimes in cyclo...

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Bibliographic Details
Published in:The Journal of chemical physics 1984-04, Vol.80 (7), p.3179-3184
Main Authors: BOLDRIDGE, D. W, JUSTUS, B. L, SCOTT, G. W
Format: Article
Language:English
Subjects:
Atomic and molecular physics
Exact sciences and technology
Fluorescence and phosphorescence
radiationless transitions, quenching (intersystem crossing, internal conversion)
Molecular properties and interactions with photons
Physics
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Summary:Picosecond time resolved, excited state absorption spectra following excitation at 355 nm are reported for 1-naphthaldehyde (1-NA) and 2-naphthaldehyde (2-NA) in room temperature solutions. The kinetics of the lowest excited singlet state (S1) decay are determined for each. The S1 lifetimes in cyclohexane are ∼26 ps for 1-NA and ∼55 ps for 2-NA. Both Sn←S1 and Tn←T1 spectra are reported. Molecular orbital model calculations based on the INDO formalism predict excited state singlet–singlet spectra and spin-orbit coupling matrix elements that are consistent with the observed spectra and kinetics.
ISSN:0021-9606
1089-7690
DOI:10.1063/1.447143