|
|||||
|
|
Studies of the triplet state of the proton-transfer tautomer in salicylaldehydes |
|
| Authors: | Pi-Tai Chou Chau-Shuen Chiou Wei-Shan Yu Guo-Ray Wu Tai-Huei Wei |
| Affiliation: | a Department of Chemistry, National Taiwan University, Taipei 621, Taiwan, ROC b Department of Chemistry, The National Chung-Cheng University, Chia Yi, Taiwan, ROC c Department of Physics, The National Chung-Cheng University, Chia Yi, Taiwan, ROC |
| 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 (τp1.8 μs, Φobs5.23×10−4) 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. |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ | |