2D-MoS 2 photocatalyzed cross dehydrogenative coupling reaction synchronized with hydrogen evolution reaction

Girish, YR and Jaiswal, K and Prakash, P and De, M (2019) 2D-MoS 2 photocatalyzed cross dehydrogenative coupling reaction synchronized with hydrogen evolution reaction. In: Catalysis Science and Technology, 9 (5). pp. 1201-1207.

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Abstract

The chemically exfoliated 2D-MoS 2 has a mixture of 1T (metallic) and 2H (semiconducting) phases. It has shown a considerably good catalytic activity for hydrogen evolution reaction (HER), proceeding via electrochemical as well as photochemical pathways. Experimentalists have utilized triethanolamine or other sacrificial donors along with Eosin Y as a photosensitizer. But the potential of this reaction has not yet been fully explored as the sacrificial donor is wasted in the oxidation process. The oxidation cycle of this process can be used in many organic transformation(s). Herein, we report the use of the oxidative cycle for efficient cross dehydrogenative coupling (CDC) reaction with tetrahydroisoquinoline and indole substrates as well as their derivatives, parallel to HER. The reaction results in good to excellent yield of the corresponding product under visible light irradiation at room temperature. The mechanistic investigation has also been carried out. This study is a potential example of how to fully harness the oxidation and reduction cycles of many semiconductor based photocatalysts. © 2019 The Royal Society of Chemistry.

Item Type:	Journal Article
Publication:	Catalysis Science and Technology
Publisher:	Royal Society of Chemistry
Additional Information:	Copyright for this article belongs to Royal Society of Chemistry.
Keywords:	Catalyst activity; Hydrogen; Molybdenum compounds; Oxidation; Photosensitizers; Triethanolamine, Cross dehydrogenative couplings; Hydrogen evolution reactions; Organic transformations; Oxidation and reduction; Oxidation process; Photochemical pathways; Tetrahydroisoquinolines; Visible-light irradiation, Layered semiconductors
Department/Centre:	Division of Chemical Sciences > Organic Chemistry
Date Deposited:	08 Apr 2019 11:53
Last Modified:	08 Apr 2019 11:53
URI:	http://eprints.iisc.ac.in/id/eprint/62029

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