Predesigned Metal-Anchored Building Block for In Situ Generation of Pd Nanoparticles in Porous Covalent Organic Framework: Application in Heterogeneous Tandem Catalysis

Bhadra, Mohitosh ; Sasmal, Himadri Sekhar ; Basu, Arghya ; Midya, Siba P. ; Kandambeth, Sharath ; Pachfule, Pradip ; Balaraman, Ekambaram ; Banerjee, Rahul (2017) Predesigned Metal-Anchored Building Block for In Situ Generation of Pd Nanoparticles in Porous Covalent Organic Framework: Application in Heterogeneous Tandem Catalysis ACS Applied Materials & Interfaces, 9 (15). pp. 13785-13792. ISSN 1944-8244

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Official URL: http://doi.org/10.1021/acsami.7b02355

Related URL: http://dx.doi.org/10.1021/acsami.7b02355

Abstract

The development of nanoparticle–polymer-hybrid-based heterogeneous catalysts with high reactivity and good recyclability is highly desired for their applications in the chemical and pharmaceutical industries. Herein, we have developed a novel synthetic strategy by choosing a predesigned metal-anchored building block for in situ generation of metal (Pd) nanoparticles in the stable, porous, and crystalline covalent organic framework (COF), without using conventional reducing agents. In situ generation of Pd nanoparticles in the COF skeleton is explicitly confirmed from PXRD, XPS, TEM images, and 15N NMR spectral analysis. This hybrid material is found to be an excellent reusable heterogeneous catalyst for the synthesis of biologically and pharmaceutically important 2-substituted benzofurans from 2-bromophenols and terminal alkynes via a tandem process with the turnover number up to 1101. The heterogeneity of the catalytic process is unambiguously verified by a mercury poisoning experiment and leaching test. This hybrid material shows superior catalytic performance compared to commercially available homogeneous as well as heterogeneous Pd catalysts.

Item Type:Article
Source:Copyright of this article belongs to American Chemical Society.
Keywords:Covalent Organic Frameworks; in situ Synthesis; Pd Nanoparticles; Tandem Catalysis; Benzofuran.
ID Code:115747
Deposited On:16 Mar 2021 07:50
Last Modified:16 Mar 2021 07:50

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