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![[(DPEPhos)(bcp)Cu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F59739.jpg&w=3840&q=50)
[(DPEPhos)(bcp)Cu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst
Published on: May 21, 2019
Copper(II) coordination-triggered conversion of a pyridyl-phenol-dialdehyde mono Schiff base and construction of a
Anupama Manna1, Siddheswar Rudra2, Shrabasti Bandyopadhyay3
1Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India. dray@chem.iitkgp.ac.in.
Abstract:
A novel phenol-alcohol-pyridine (OON) donor-bearing ligand (HL1) has been identified while exploring the coordination reactivity of an orthodox Schiff base HL (ON donors only) with a dangling pyridine group via the hydration of the imine function (-HCN-) embedded within HL. The µ3 bridging mode of the hemiaminal alkoxido O donor of [L1]2- induces the self-aggregation of four [Cu(L1)] units into a novel tetranuclear [Cu(L1)]4 (3) complex through cyclization of the four [Cu(L1)] units. The ligand transformation (HL → HL1) in copper(II) bound forms was justified by a DFT study. Control reactions of HL with ZnCl2·H2O and N-donor co-ligands showed the stability and coordination of the original L- form in [Zn(L)(ampy)Cl] (1) and its imine-hydrolyzed form in [Zn(dial)(bpy)Cl] (2). Complex 3 shows weak antiferromagnetic intermolecular interactions below 100 K. Electrochemical studies demonstrated the efficacy of complex 3 towards the OER. Complex 1 exhibited reasonable antibacterial, antibiofilm and antivirulence activity, demonstrating its potential as a therapeutic alternative, in sharp contrast to complex 3.
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