A Laser Flash Photolysis Study of Sydnone Triplets. Photophysical Behaviours and Singlet Oxygen Sensitisation
| Main Authors: | K. BHATTACHARYYA, M. MUNEER, R. K. TIKARE, P. K. DAS, M. V. GEORGE |
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| Format: | Article Journal |
| Bahasa: | eng |
| Terbitan: |
, 1986
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/6240256 |
Daftar Isi:
- Chemistry Department and Radiation Laboratory, University of Notre Dame, Notre Dame, Indiana-46556 and Department of Chemistry, Indian Institute of Technology, Kanpur-203 016 Under energy transfer sensitisation in fluid solutions, sydnones form triplets (λmaxT=380-400 nm) characterised by short lifetimes (0.2-2 μs). From kinetic studies using these compounds as triplet donors and acceptors, their triplet energies are estimated at 41-47 kcal mol-1. Based on the lack of any residual absorbance change following the decay of triplets, it is claimed that they are not involved as precursors in the phototransformation of sydnones to nitrilimines. The oxygen quenching of sydnone triplets occurs predominantly by the energy transfer mechanism producing singlet oxygen in nearly quantitative yields.