Isolation of monomeric copper(II) phenolateselenoether complexes and their electrocatalytic hydrogen gas evolution activity Aditya Upadhyay 1 , Sangit Kumar 2 1 Indian Institute of Science Education and Research Bhopal, India, 2 Bhopal, India Characterized for the first time from copper(I) phenanthroline and various substituted ortho- bisphenylselenidephenol chelating ligands. The synthesized complexes exhibit Jahn–Teller distortion in their geometry and varied from distorted square planar to distorted octahedral by varying substituents in the bis- selenophenolate ligand. The synthesized complexes electrocatalyze the hydrogen evolution reaction (HER) with a faradaic efficiency of up to 89%, and it was observed that the distorted square pyramidal geometry is the optimum geometry for the maximum efficiency of these copper complexes. References 1. A. Upadhyay, H. Meena, R. K. Jha, Kanika, and S. Kumar, Dalton Trans. 2022, 51 , 7284–7293.
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