Polypyridyl chromium(iii) complexes for non-volatile memory application: impact of the coordination sphere on memory device performance

Abstract

To gain insights into the molecular design, the memory devices of various Cr(iii) complexes have been studied.

Opto-Electroactive Amino- and Pyridyl-Terminated Monolayers of RuII–Terpyridyl Complexes and Their Usage as Hg2+ Sensors

“…4,5 Accordingly, the solubility, stability, redox potential and kinetics, and optical characteristics of metal− polypyridyl complexes can be controlled and manipulated in a desired way. For these reasons, functional polypyridyl complexes have found great utility in the design of metallosupramolecular architectures 6 as well as active elements in photodynamic therapy, 7,8 catalysts, 9,10 sensing modules, 11,12 components of nonvolatile memory devices, 13,14 photochromic or electrochromic elements in solid-state devices, 15,16 and media for charge and spin transport. 17,18 Most of these applications rely on covalent or noncovalent assembly of polypyridyl complexes on suitably functionalized solid substrates, which provide aligned and densely packed nanometric architectures, with a much better control over molecular orientation, integrity, and functionality compared to the liquid media case.…”

Metal-containing organic compounds for memory and data storage applications

“…121 In 2018, Roy et al reported a series of homoleptic and heteroleptic polypyridyl Cr(III) complexes by varying the bidentate diamine ligands, [Cr(N-N) 2 (N-N 0 )]X 3 , where N-N = 1,10-phenanthroline, N-N 0 = 4,4 0 -dimethyl-2,2 0bipyridine, 3,4,7,8-tetramethyl-1,10-phenanthroline, 5,6-dibromo-1,10-phenanthroline or 4,4--bis(methoxycarbonyl)-2,2--bipyridine, X = CF 3 SO 3 À or PF 6 À counter anion (S30-S34). 122 The memory devices based on these solution-processable Cr(III) complexes (Al/S30-S34/Al) were fabricated by the facile spin-coating technology, and the structure-memory performance relationship was then systematically investigated. The I-V curves of the devices based on S30 and S31 show a reversible and stable bipolar flashtype switching characteristic with the high I ON /I OFF ratios of 10 4 and 10 6 , respectively (see Fig.…”

Recent advances in organic‐based materials for resistive memory applications

“…Organometallic complexes (OMCs) have also attracted great interest for resistive memory switching in recent years. Many research teams have successfully synthesized OMCs for information storage applications 35,40,170‐179 . OMCs are usually made of transition metals with well‐defined coordination structures and surrounding ligands.…”