Design and synthesis of a solution-processed redox-active bis(formazanate) zinc complex for resistive switching applications

Birara, Sunita; Saini, Shalu; Majumder, Moumita; Lama, Prem; Tiwari, Shree Prakash; Metre, Ramesh K.

doi:10.1039/d3dt02809g

Cited by 2 publications

(1 citation statement)

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“…On the other hand, performing electrocatalytic OER using Ni-based organometallic or coordination complexes, having a well-defined structure isolated via the single-crystal X-ray diffraction (SCXRD) technique, can help to identify the structure–activity relationships. − Moreover, a wide range of spectroscopic techniques are available for the detailed characterization of the molecular complexes, and computational studies on these realistic structures are available for predicting the actual catalytic pathways. ,, This collaborative approach is challenging with traditional nickel oxide/hydroxide-based catalysts. Therefore, very recently, Ni-based coordination complexes have been put forward in the interest of developing the advanced OER catalyst’s design .…”

Section: Introductionmentioning

confidence: 99%

Designing a Phenalenyl-Based Dinuclear Ni(II) Complex: An Electrocatalyst with Two Single Ni Sites for the Oxygen Evolution Reaction (OER)

Kamboj,

Metre

2024

Inorg. Chem.

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A new dinuclear Ni(II) complex 1, [Ni2 II(dtbh-PLY)2], is synthesized from 9-(2-(3,6-di-tert-butyl-2-hydroxybenzylidene)hydrazineyl)-1H-phenalen-1-one, dtbh-PLYH2 ligand, and structurally characterized by various analytical tools including the single-crystal X-ray diffraction (SCXRD) technique. In the solid state, both Ni(II) metal centers in complex 1 exist in a distorted square planar geometry and display the presence of rare Ni···H–C anagostic interactions to form a one-dimensional (1-D) linear motif in the supramolecular array. Complex 1 is further stabilized in the solid state by π–π-stacking interactions between the highly delocalized phenalenyl rings. The redox features of complex 1 have been analyzed by the cyclic voltammetry (CV) technique in solution as well as in the solid state, revealing the crucial involvement of both the Ni(II) metal centers for undergoing quasi-reversible oxidation reactions on the application of an anodic sweep. A complex 1-modified glassy carbon electrode, GC-1, is employed as an electrocatalyst for oxygen evolution reaction (OER) in 1.0 M KOH, giving an OER onset at 1.45 V, and very low OER overpotential, 300 mV vs the reversible hydrogen electrode (RHE) to reach 10 mA cm–2 current density. Furthermore, GC-1 displayed fast OER kinetics with a Tafel slope of 40 mV dec–1, a significantly lower Tafel slope value than those of previously reported molecular Ni(II) catalysts. In situ electrochemical experiments and postoperational UV–vis, Fourier transform infrared (FT-IR), scanning electron microscopy-energy-dispersive X-ray spectroscopy (SEM-EDS), and X-ray photoelectron spectroscopy (XPS) studies were performed to analyze the stability of the molecular nature of complex 1 and to gain reasonable insights into the true OER catalyst.

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Section: Introductionmentioning

confidence: 99%

Designing a Phenalenyl-Based Dinuclear Ni(II) Complex: An Electrocatalyst with Two Single Ni Sites for the Oxygen Evolution Reaction (OER)

Kamboj,

Metre

2024

Inorg. Chem.

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A solution-processable benzothiazole-substituted formazanate zinc(ii) complex designed for a robust resistive memory device

Birara,

Saini,

Majumder

et al. 2024

Dalton Trans.

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Design and synthesis of a solution-processed redox-active bis(formazanate) zinc complex for resistive switching applications

Abstract: In this paper, we report the synthesis and characterization of mononuclear zinc complex (1) containing redox-active bis(4-antipyrinyl) derivative of 3-cyanoformazanate ligand. Complex (1) was readily obtained by refluxing zinc acetate...

Cited by 2 publications

References 66 publications

Designing a Phenalenyl-Based Dinuclear Ni(II) Complex: An Electrocatalyst with Two Single Ni Sites for the Oxygen Evolution Reaction (OER)

Designing a Phenalenyl-Based Dinuclear Ni(II) Complex: An Electrocatalyst with Two Single Ni Sites for the Oxygen Evolution Reaction (OER)

A solution-processable benzothiazole-substituted formazanate zinc(ii) complex designed for a robust resistive memory device

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