P. Chou, Chau-Shuen Chiou, Wei-Shan Yu
Mar 21, 2003
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Influential Citations
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Journal
Chemical Physics Letters
Abstract
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 ( τ p ∼1.8 μs , Φ obs ∼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 3.12×10 2 s −1 , respectively. Consequently, the energetics and dynamics of the triplet states during a proton transfer cycle are discussed in detail.