Diaspore as an efficient halide-free catalyst for the conversion of CO 2 into cyclic carbonates

Mitra, Antarip and Paliwal, Khushboo S. and Ghosh, Sourav and Bag, Saikat and Roy, Avishek and Chandrasekar, Aditi and Mahalingam, Venkataramanan (2023) Diaspore as an efficient halide-free catalyst for the conversion of CO 2 into cyclic carbonates. Inorganic Chemistry Frontiers, 10 (21). pp. 6329-6338. ISSN 2052-1553

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Abstract

Efficient fixation of carbon dioxide (CO 2 ) into epoxides under atmospheric pressure generally necessitates the use of halide ion-containing co-catalysts. However, the use of halide ion-containing materials as catalysts is less encouraged, particularly from an industrial point of view. This demands the development of a suitable halide-free catalyst for the successful fixation of CO 2 into epoxides to prepare cyclic carbonates under atmospheric pressure. In this work, we report diaspore [α-AlO(OH)] as an efficient halide-free catalyst for CO 2 fixation. Diaspore in the presence of a small amount of dimethyl formamide is able to convert a range of epoxides into their corresponding cyclic carbonates. Hardly any loss in the catalytic activity or change in the functional/chemical characteristics of diaspore was observed after five cycles. DFT calculations reveal the spontaneity of the diaspore-catalyzed cycloaddition reaction compared to that of the diaspore-free reaction. The stabilization of the substrates and intermediates on diaspore resulted in an overall negative change in Gibb's free energy of the reaction.

Item Type:	Article
Authors:	Mitra, Antarip and Paliwal, Khushboo S. and Ghosh, Sourav and Bag, Saikat and Roy, Avishek and Chandrasekar, Aditi and Mahalingam, Venkataramanan
Document Language:	Language English
Subjects:	Natural Sciences > Chemistry & allied sciences Natural Sciences > Earth sciences > Economic geology > Inorganic gases > Oxygen
Divisions:	Azim Premji University - Bengaluru > School of Arts and Sciences
Full Text Status:	None
URI:	http://publications.azimpremjiuniversity.edu.in/id/eprint/7003
Publisher URL:	https://doi.org/10.1039/d3qi01386c

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