View : 18 Download: 0

Photocatalytic Oxygenation Reactions with a Cobalt Porphyrin Complex Using Water as an Oxygen Source and Dioxygen as an Oxidant

Title
Photocatalytic Oxygenation Reactions with a Cobalt Porphyrin Complex Using Water as an Oxygen Source and Dioxygen as an Oxidant
Authors
Hong, Young HyunHan, Ji WonJung, JieunNakagawa, TatsuoLee, Yong-MinNam, WonwooFukuzumi, Shunichi
Ewha Authors
남원우이용민Shunichi Fukuzumi정지은
SCOPUS Author ID
남원우scopus; Shunichi Fukuzumiscopus; 정지은scopus
Issue Date
2019
Journal Title
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
ISSN
0002-7863JCR Link
Citation
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY vol. 141, no. 23, pp. 9155 - 9159
Publisher
AMER CHEMICAL SOC
Indexed
SCI; SCIE; SCOPUS WOS
Document Type
Article
Abstract
Photocatalytic oxygenation of hexamethylbenzene occurs under visible-light irradiation of an O(2)(-)saturated acetonitrile solution containing a cobalt porphyrin complex Co-II(TPP) (TPP2 = tetraphenylporphyrin dianion), water, and triflic acid (HOTf) via a one-photon-two-electron process, affording pentamethylbenzyl alcohol and hydrogen peroxide as products with a turnover number of >6000; in this reaction, H2O and O-2 were used as an oxygen source and a two-electron oxidant, respectively. The photocatalytic mechanism was clarified by means of electron paramagnetic resonance, time-resolved fluorescence, and transient absorption measurements as well as O-18-labeling experiments with (H2O)-O-18 and O-18(2). To the best of our knowledge, we report the first example of efficient photocatalytic oxygenation of an organic substrate by a metal complex using H2O as an oxygen source and O-2 as a two-electron oxidant.
DOI
10.1021/jacs.9b02864
Appears in Collections:
자연과학대학 > 화학·나노과학전공 > Journal papers
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE