Excited state spectroscopy of 1,5-naphthyridine: Identification of the lowest energy excited singlet state as 1Bg( 1nπ*)

David W. Boldridge, Gary W. Scott

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Abstract

The electronic absorption spectra of excited-state 1,5-naphthyridine from 400 to 650 nm are reported in several solvents. The time evolution of these spectra indicate that they arise from one or more Sn←S 1 transitions. Comparison of these observed spectra with calculated excited state absorption spectra obtained using the INDO molecular orbital formalism demonstrates excellent agreement of the transition energies and oscillator strengths with Sn(1Au)←S 1(1Bg,nπ* transitions. These results conclusively identify the lowest excited singlet state of 1,5-naphthyridine as 1Bg(1nπ*).

Original languageEnglish
Pages (from-to)3639-3644
Number of pages6
JournalJournal of Chemical Physics
Volume79
Issue number8
DOIs
StatePublished - 1983

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