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A solution-processable benzothiazole-substituted formazanate zinc(II) complex designed for a robust resistive memory
Sunita Birara1, Shalu Saini2, Moumita Majumder3
1Department of Chemistry, Indian Institute of Technology Jodhpur, Rajasthan-342030, India. rkmetre@iitj.ac.in.
A new zinc complex with redox-active formazan ligands shows promise for resistive random-access memory (RRAM) devices. This material offers excellent switching properties and stability for future memory applications.
Area of Science:
- Coordination Chemistry
- Materials Science
- Nanotechnology
Background:
- Novel mononuclear bis(formazanate)zinc complex (1) synthesized using a redox-active formazan ligand.
- Complex 1 prepared via reaction of zinc acetate dihydrate with the formazan derivative.
Purpose of the Study:
- Characterize the structure and electrochemical properties of the novel zinc complex.
- Investigate the potential of complex 1 as a material for resistive switching memory applications.
Main Methods:
- Synthesis and characterization of the zinc complex.
- X-ray crystallography to determine solid-state structure.
- Cyclic voltammetry for electrochemical analysis.
- Fabrication and testing of [FTO/ZnII L2(1)]/Ag resistive random-access memory (RRAM) devices.
Main Results:
- Distorted octahedral geometry with ligands coordinating in an 'open' form, creating five-membered chelate rings.
- Complex 1 exhibits electrochemical reduction and oxidation, forming radical anionic and dianionic states.
- RRAM devices show high ON/OFF ratio (10^3), low switching voltages (0.9 V SET, -0.75 V RESET), and good endurance/retention.
Conclusions:
- Redox-active formazanate metal complexes are important for developing advanced memory storage devices.
- Complex 1 demonstrates significant potential for solution-processable resistive switching memory applications.
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