Generation and Electron-Transfer Reactivity of the Long-Lived Photoexcited State of a Manganese(IV)-Oxo-Scandium Nitrate Complex
- 주제(키워드) electron transfer , manganese(IV)-oxo complex , photoexcited state , scandium ion
- 등재 SCIE, SCOPUS
- 발행기관 Wiley-VCH Verlag
- 발행년도 2020
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000174869
- 본문언어 영어
- Published As http://dx.doi.org/10.1002/ijch.201900147
- 저작권 이화여자대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
Photoexcitation of a manganese(IV)-oxo-scandium nitrate complex ([(Bn-TPEN)MnIV(O)]2+−Sc(NO3)3) in a solvent mixture of trifluoroethanol and acetonitrile (v/v=1 : 1) resulted in generation of the long-lived photoexcited state, which is detected by nanosecond laser transient absorption measurements. The transient absorption maximum (λmax) of the 2E excited state of [(Bn-TPEN)MnIV(O)]2+−Sc(NO3)3 is observed at 620 nm with lifetimes of 7.1 μs. The λmax value is blue-shifted and the lifetime becomes longer as compared with the previously reported values of λmax (640 nm) and lifetime (6.4 μs) of the 2E excited state of the 1 : 2 complex between [(Bn-TPEN)MnIV(O)]2+ and Sc(OTf)3 ([(Bn-TPEN)MnIV(O)]2+−(Sc(OTf)3)2). The electron-transfer reactivity of the 2E excited states of [(Bn-TPEN)MnIV(O)]2+−Sc(NO3)3 was similar to that of [(Bn-TPEN)MnIV(O)]2+−(Sc(OTf)3)2. The long lifetime and the high reactivity of the 2E excited state of [(Bn-TPEN)MnIV(O)]2+−Sc(NO3)3 provide an excellent photooxidant for oxidation of compounds, which would otherwise be impossible to be oxidized. © 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
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