Long-Lived Photoexcited State of a Mn(IV)-Oxo Complex Binding Scandium Ions That is Capable of Hydroxylating Benzene

Namita Sharma; Jieun Jung; Kei Ohkubo; Yong Min Lee; Mohamed E. El-Khouly; Wonwoo Nam; Shunichi Fukuzumi

doi:10.1021/jacs.8b04904

Long-Lived Photoexcited State of a Mn(IV)-Oxo Complex Binding Scandium Ions That is Capable of Hydroxylating Benzene

Namita Sharma, Jieun Jung, Kei Ohkubo, Yong Min Lee, Mohamed E. El-Khouly, Wonwoo Nam, Shunichi Fukuzumi

Department of Chemistry & Nanoscience

Research output: Contribution to journal › Article › peer-review

44 Scopus citations

Abstract

Photoexcitation of a Mn ^IV -oxo complex binding scandium ions ([(Bn-TPEN)Mn ^IV (O)] ²⁺ -(Sc(OTf) ₃ ) ₂ ) in a solvent mixture of trifluoroethanol and acetonitrile (v/v = 1:1) resulted in formation of the long-lived photoexcited state, which can hydroxylate benzene to phenol. The photohydroxylation of benzene by [(Bn-TPEN)Mn ^IV (O)] ²⁺ -(Sc(OTf) ₃ ) ₂ was made possible by electron transfer from benzene to the long-lived ² E excited state of [(Bn-TPEN)Mn ^IV (O)] ²⁺ -(Sc(OTf) ₃ ) ₂ to produce a benzene radical cation, which reacted with water as revealed by laser-induced transient absorption measurements.

Original language	English
Pages (from-to)	8405-8409
Number of pages	5
Journal	Journal of the American Chemical Society
Volume	140
Issue number	27
DOIs	https://doi.org/10.1021/jacs.8b04904
State	Published - 11 Jul 2018

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© 2018 American Chemical Society.

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title = "Long-Lived Photoexcited State of a Mn(IV)-Oxo Complex Binding Scandium Ions That is Capable of Hydroxylating Benzene",

abstract = " Photoexcitation of a Mn IV -oxo complex binding scandium ions ([(Bn-TPEN)Mn IV (O)] 2+ -(Sc(OTf) 3 ) 2 ) in a solvent mixture of trifluoroethanol and acetonitrile (v/v = 1:1) resulted in formation of the long-lived photoexcited state, which can hydroxylate benzene to phenol. The photohydroxylation of benzene by [(Bn-TPEN)Mn IV (O)] 2+ -(Sc(OTf) 3 ) 2 was made possible by electron transfer from benzene to the long-lived 2 E excited state of [(Bn-TPEN)Mn IV (O)] 2+ -(Sc(OTf) 3 ) 2 to produce a benzene radical cation, which reacted with water as revealed by laser-induced transient absorption measurements.",

author = "Namita Sharma and Jieun Jung and Kei Ohkubo and Lee, {Yong Min} and El-Khouly, {Mohamed E.} and Wonwoo Nam and Shunichi Fukuzumi",

note = "Publisher Copyright: {\textcopyright} 2018 American Chemical Society.",

year = "2018",

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doi = "10.1021/jacs.8b04904",

language = "English",

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T1 - Long-Lived Photoexcited State of a Mn(IV)-Oxo Complex Binding Scandium Ions That is Capable of Hydroxylating Benzene

AU - Sharma, Namita

AU - Jung, Jieun

AU - Ohkubo, Kei

AU - Lee, Yong Min

AU - El-Khouly, Mohamed E.

AU - Nam, Wonwoo

AU - Fukuzumi, Shunichi

PY - 2018/7/11

Y1 - 2018/7/11

N2 - Photoexcitation of a Mn IV -oxo complex binding scandium ions ([(Bn-TPEN)Mn IV (O)] 2+ -(Sc(OTf) 3 ) 2 ) in a solvent mixture of trifluoroethanol and acetonitrile (v/v = 1:1) resulted in formation of the long-lived photoexcited state, which can hydroxylate benzene to phenol. The photohydroxylation of benzene by [(Bn-TPEN)Mn IV (O)] 2+ -(Sc(OTf) 3 ) 2 was made possible by electron transfer from benzene to the long-lived 2 E excited state of [(Bn-TPEN)Mn IV (O)] 2+ -(Sc(OTf) 3 ) 2 to produce a benzene radical cation, which reacted with water as revealed by laser-induced transient absorption measurements.

AB - Photoexcitation of a Mn IV -oxo complex binding scandium ions ([(Bn-TPEN)Mn IV (O)] 2+ -(Sc(OTf) 3 ) 2 ) in a solvent mixture of trifluoroethanol and acetonitrile (v/v = 1:1) resulted in formation of the long-lived photoexcited state, which can hydroxylate benzene to phenol. The photohydroxylation of benzene by [(Bn-TPEN)Mn IV (O)] 2+ -(Sc(OTf) 3 ) 2 was made possible by electron transfer from benzene to the long-lived 2 E excited state of [(Bn-TPEN)Mn IV (O)] 2+ -(Sc(OTf) 3 ) 2 to produce a benzene radical cation, which reacted with water as revealed by laser-induced transient absorption measurements.

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ER -

Long-Lived Photoexcited State of a Mn(IV)-Oxo Complex Binding Scandium Ions That is Capable of Hydroxylating Benzene

Abstract

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