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Ag Nanoparticles Supported on a Resorcinol‐Phenylenediamine‐Based Covalent Organic Framework for Chemical Fixation of CO 2
Author(s) -
Chakraborty Debanjan,
Shekhar Pragalbh,
Singh Himan Dev,
Kushwaha Rinku,
Vinod C. P.,
Vaidhyanathan Ramanathan
Publication year - 2019
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201901157
Subject(s) - heteroatom , covalent organic framework , catalysis , adsorption , chemical engineering , covalent bond , resorcinol , materials science , nanoparticle , polymer , nanocomposite , propargyl , chemistry , polymer chemistry , organic chemistry , nanotechnology , ring (chemistry) , engineering
Covalent organic frameworks are a new class of crystalline organic polymers possessing a high surface area and ordered pores. Judicious selection of building blocks leads to strategic heteroatom inclusion into the COF structure. Owing to their high surface area, exceptional stability and molecular tunability, COFs are adopted for various potential applications. The heteroatoms lining in the pores of COF favor synergistic host–guest interaction to enhance a targeted property. In this report, we have synthesized a resorcinol‐phenylenediamine‐based COF which selectively adsorbs CO 2 into its micropores (12 Å). The heat of adsorption value (32 kJ mol −1 ) obtained from the virial model at zero‐loading of CO 2 indicates its favorable interaction with the framework. Furthermore, we have anchored small‐sized Ag nanoparticles (≈4–5 nm) on the COF and used the composite for chemical fixation of CO 2 to alkylidene cyclic carbonates by reacting with propargyl alcohols under ambient conditions. Ag@COF catalyzes the reaction selectively with an excellent yield of 90 %. Recyclability of the catalyst has been demonstrated up to five consecutive cycles. The post‐catalysis characterizations reveal the integrity of the catalyst even after five reaction cycles. This study emphasizes the ability of COF for simultaneous adsorption and chemical fixation of CO 2 into corresponding cyclic carbonates.