Intramolecular donor-acceptor systems. 5. Heavy atom effects on excited states of 6-N-arylamino-2-naphthalenesulfonate derivatives

Edward M. Kosower, Hanna Dodiuk

Research output: Contribution to journalArticlepeer-review

Abstract

Heavy atoms substituted into the aryl group of 6-N-arylamino-2-naphthalenesulfonate (6,2-ANS) derivatives diminish the fluorescence quantum yield (φF) of the naphthalene-centered, S1,np → S0,np emission but do not affect φF from the charge-transfer state, the S1,ct → S0 emission. The low substituent sensitivities of fluorescence emission energies of 6,2-ANS derivatives in EPA glass at 77 K characterize them as S1,np → S0,np emissions. The phosphorescence quantum yield, φP, is augmented little and the phosphorescence lifetimes of 6,2-ANS derivatives are unaffected by such heavy atom substitutions except in the cases of 4-bromo derivatives.

Original languageEnglish
Pages (from-to)2012-2015
Number of pages4
JournalJournal of Physical Chemistry
Volume82
Issue number18
DOIs
StatePublished - 1978

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