Carbon Nitride Grafted Cobalt Complex (Co@npg‐C3N4) for Visible Light−Assisted Esterification of Aldehydes. Issue 12 (27th April 2017)

• Record Type: Journal Article
• Authors: Kumar, Anurag; Kumar, Pawan; Pathak, Abhishek Kumar; Chokkapu, Appala Naidu; Jain, Suman L.
• Is Part Of: ChemistrySelect. Volume 2:Issue 12(2017)
• Page Start: 3437
• Page End: 3443
• Publication Date: 2017-04-27
• Subjects: carbon nitride -- click reaction -- cobalt -- esterification -- photocatalysis; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.201602031
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: Azide containing bipyridine complex of cobalt was grafted to the propargylated nanoporous graphitic carbon nitride (npg‐C3 N4 ) via click reaction to obtain heterogenized photocatalyst which could efficiently provide direct esterification of aldehydes under visible light irradiation at room temperature. The use of click reaction as grafting strategy provided covalent attachment of the cobalt complex to support which not only provided higher loading but also precluded the leaching. Furthermore, the presence of carbon nitride support exhibited synergistic effect to enhance the reaction rate. In addition, the milder basic nature of nitrogen containing graphitic support provided efficient ester synthesis without the need for an external base. The synthesized photocatalyst was found to be quite robust which could easily be recovered and reused several times without significantly losing activity. Abstract : Click reaction was used as an immobilization strategy for heterogenization of cobalt complex to nanoporous graphitic carbon nitride. The synthesized photocatalyst was used for direct esterification reaction of aldehydes with alcohols under visible light irradiation at room temperature. Photocatalyst exhibited higher stability and recyclability for several runs with consistent activity.