Encapsulation of Silver Nanoparticles in an Amine-Functionalized Porphyrin Metal-Organic Framework and Its Use as a Heterogeneous Catalyst for CO2 Fixation under Atmospheric Pressure

Dutta, Gargi and Jana, Ajay Kumar and Singh, Dheeraj Kumar and Eswaramoorthy, M and Natarajan, Srinivasan (2018) Encapsulation of Silver Nanoparticles in an Amine-Functionalized Porphyrin Metal-Organic Framework and Its Use as a Heterogeneous Catalyst for CO2 Fixation under Atmospheric Pressure. In: CHEMISTRY-AN ASIAN JOURNAL, 13 (18). pp. 2677-2684.

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Abstract

A new porphyrin-based compound, Zn-3(C40H24N8)(C20H8N2O4)(2)(DEF)(2)](DEF)(3) (1; DEF =N,N-diethyl-formamide), has been synthesized by employing 5,10,15,20-tetrakis(4-pyridyl)porphyrin, 1,2-diamino-3,6-bis(4-carboxyphenyl)benzene, and Zn2+ salt at 100 degrees C under solvothermal conditions. The structure, as determined by single-crystal XRD studies, is three-dimensional with threefold interpenetration. The usefulness of free -NH2 groups in the ligand was exploited for anchoring silver nanoparticles through a simple solution-based route. The silver-loaded sample, Ag@1, was characterized by powder XRD, energy-dispersive X-ray spectroscopy, high-resolution TEM, SEM, X-ray photo-electron spectroscopy, and inductively coupled plasma MS analysis, which clearly indicated that silver nanoparticles with a size of 3.83 nm were uniformly distributed within the metal-organic framework (MOF). The Ag@1 sample was evaluated for possible catalytic activity for the carboxylation of a terminal alkyne by employing CO2 under atmospheric pressure; this gave excellent results. The Ag@1 catalyst was found to be robust, active, and recyclable. The present studies suggest that porphyrin MOFs not only exhibit interesting structures, but also show good heterogeneous catalytic activity towards the fixation of CO2.

Item Type:	Journal Article
Publication:	CHEMISTRY-AN ASIAN JOURNAL
Publisher:	WILEY-V C H VERLAG GMBH
Additional Information:	Copy right for this article belong to WILEY-V C H VERLAG GMBH
Keywords:	heterogeneous catalysis; metal-organic frameworks; nanoparticles; porphyrinoids; silver
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	03 Oct 2018 14:03
Last Modified:	03 Oct 2018 14:03
URI:	http://eprints.iisc.ac.in/id/eprint/60797

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