title: Pd loaded amphiphilic COF as catalyst for multi-fold Heck reactions, C-C couplings and CO oxidation.
abstract: COFs represent a class of polymers with designable crystalline structures capable of interacting with active metal nanoparticles to form excellent heterogeneous catalysts. Many valuable ligands/monomers employed in making coordination/organic polymers are prepared via Heck and C-C couplings. Here, we report an amphiphilic triazine COF and the facile single-step loading of Pd(0) nanoparticles into it. An 18-20% nano-Pd loading gives highly active composite working in open air at low concentrations (Conc. Pd(0) <0.05 mol%, average TON 1500) catalyzing simultaneous multiple site Heck couplings and C-C couplings using 'non-boronic acid' substrates, and exhibits good recyclability with no sign of catalyst leaching. As an oxidation catalyst, it shows 100% conversion of CO to CO2 at 150 °C with no loss of activity with time and between cycles. Both vapor sorptions and contact angle measurements confirm the amphiphilic character of the COF. DFT-TB studies showed the presence of Pd-triazine and Pd-Schiff bond interactions as being favorable.
authors.affiliation: Department of Chemistry, Indian Institute of Science Education and Research, Pune, India.
authors.forename: Dinesh
authors.initials: D
authors.lastname: Mullangi
authors.affiliation: Department of Chemistry, Indian Institute of Science Education and Research, Pune, India.
authors.forename: Shyamapada
authors.initials: S
authors.lastname: Nandi
authors.affiliation: Department of Chemistry, Indian Institute of Science Education and Research, Pune, India.
authors.forename: Sorout
authors.initials: S
authors.lastname: Shalini
authors.affiliation: CSIR-NCL Catalysis and Inorganic Chemistry Division, Pune, India.
authors.forename: Sheshadri
authors.initials: S
authors.lastname: Sreedhala
authors.affiliation: CSIR-NCL Catalysis and Inorganic Chemistry Division, Pune, India.
authors.forename: Chathakudath P
authors.initials: CP
authors.lastname: Vinod
authors.affiliation: Department of Chemistry, Indian Institute of Science Education and Research, Pune, India.
authors.forename: Ramanathan
authors.initials: R
authors.lastname: Vaidhyanathan