Neutral Metal 1,2-Dithiolenes: Preparations, Properties and Possible Applications of Unsymmetrical in Comparison to the Symmetrical

Abstract

This paper is an overview concerning the preparations and properties as well as possible applications of neutral (one component) metal 1,2-dithiolenes (and selenium analogues). The structural, chemical, electrochemical, optical and electrical behavior of these complexes depend strongly on the nature of ligand and/or the metal. The results of unsymmetrical in comparison to those of symmetrical complexes related to the properties of materials in the solid state are primarily discussed. The optical absorption spectra exhibit strong bands in the near IR spectral region ca. 700 to ca. 1950 nm. X-ray crystal structure solutions show that the complexes usually have square-planar geometry with S-S and/or M-S contacts. Some of them behave as semiconductors or conductors (metals) and are stable in air. The cyclic voltammograms at negative potentials are different from the corresponding potentials of tetrathiafulvalenes (TTFs). As a consequence, the LUMO bands occur at much lower levels than those of TTFs. Consequently, electrical measurements under conditions of field effect transistors exhibit n-type or ambipolar behavior. Illumination of materials with high power lasers exhibits non-linear optical behavior. These properties enable metal 1,2-dithiolene complexes to be classified as promising candidates for optical and electronic applications, (e.g., saturable absorbers, ambipolar inverters). OPEN ACCESSCrystals 2012, 2 763

Mixtures of quasi-two and three dimensional hybrid organic-inorganic semiconducting perovskites for single layer LED

“…In [26] mechanical milling was shown to be a method able to produce mixed blends of quasi-2D/3D semiconductors manifesting optical energy transfer effects for all mixed halogen stoichiometries, controllably covering most of the optical spectrum. It appears that optical luminescence coupled to energy transfer phenomena is easily attainable by simple sample manipulation.…”

“…The inorganic part is usually the semiconductor, composed of a metal halide unit network, while the organic part is usually composed of electrooptically inactive amines. In the past, a wide set of combinations of inorganic and organic parameters have led to HOIS with a variety of properties such as controlled absorption in the whole spectral ultraviolet-visible region [2], thin film transistor gate materials comparable to amorphous Si [23][24][25] or energy transfer optical phenomena, for example see [26][27][28] and refs. therein.…”

Nickel dithiolene complexes encapsulated in biocompatible amphiphilic diblock copolymer nanoparticles

“…It has been observed, years ago, that the optical absorption spectra of solutions of monoanionic or neutral 1,2‐MDTs (M = Ni, Pd, Pt), exhibit strong bands, which span the range 700–1900 nm, depending on the nature of the metal, the ligand, and the solvent . The bands have been interpreted as the HOMO‐LUMO transitions or as ligand‐to‐ligand charge transfer transitions.…”

Theoretical Study of the Interaction of 1,2-Dithiolene Ligands with the Mg2+ and Ca2+ Aquacations: Electronic, Geometric and Energetic Analysis

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