Studies of the triplet state of the proton-transfer tautomer in salicylaldehydes
Resource
Chemical Physics Letters 370 (5-6): 747-755
Journal
Chemical Physics Letters
Journal Volume
370
Journal Issue
5-6
Pages
747-755
Date Issued
2003
Author(s)
Abstract
The spectroscopy and dynamics of the low-lying triplet state of the proton-transfer tautomer in salicylaldehydes have been studied via internal heavy-atom effects coupled with a sensitive near-IR detecting system. For 3,5-diiodosalicylaldehyde a weak proton-transfer keto-tautomer phosphorescence was resolved with a maximum at 710 nm (τp ∼ 1.8 μs, φobs ∼ 5.23 × 10-4) in a 77 K methylcyclohexane glass. The results, in combination with the time-resolved thermal lensing experiment, further deduced the triplet-state population yield and radiative decay rate to be 0.20 (298 K) and 3.12 × 102 s-1, respectively. Consequently, the energetics and dynamics of the triplet states during a proton transfer cycle are discussed in detail. © 2003 Elsevier Science B.V. All rights reserved.
Type
journal article
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