Journal
CHEMICAL PHYSICS LETTERS
Volume 739, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.cplett.2019.136952
Keywords
Singlet oxygen; Ionic liquid; 2,5-diphenylfuran; Rose Bengal; Photosensitization; Trap
Funding
- National Natural Science Foundation of China [21573231, 21473194]
- Innovation Foundation of the Chinese Academy of Sciences [CXJJ-17S055, 16S024]
- 2016 Innovation Task Foundation of the Key Laboratory of Chemical Laser
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2,5-Diphenylfuran was used as chemical trap for indirect detection of singlet oxygen (O-1(2)) in ionic liquids (ILs). O-1(2) was generated by photosensitization of Rose Bengal and the first order quenching rate constants of O-1(2) were determined by UV-vis spectroscopy. The effects of the ILs structure on the rate constants were discussed. Furthermore, the generation of O-1(2) in ILs was directly confirmed by means of the time-resolved NIR emission spectroscopy. The correlations between O-1(2) lifetimes and the rate constants of 2,5-diphenylfuran quenching were elucidated, from perspectives of cationic and anionic structure of ILs, respectively.
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