Syntheses, Structures, and Physical Properties of Neutral Gold Dithiolate Complex, [Au(etdt)2]·THF

Kazuha Sakaguchi,Biao Zhou,Hajime Kamebuchi,Yuki Idobata,Akiko Kobayashi

doi:10.3390/cryst10111001

Kazuha Sakaguchi, Biao Zhou + Show 3 more

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https://doi.org/10.3390/cryst10111001

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Journal: Crystals	Publication Date: Nov 4, 2020
Citations: 2	License type: CC BY 4.0

Affiliation: Nihon University

Abstract

In order to develop new types of single-component molecular conductors with novel electronic structures and physical properties, the neutral gold dithiolate complex with an etdt (= ethylenedithiotetrathiafulvalenedithiolate) ligand, [Au(etdt)2] was prepared. However, unlike the reported single-component molecular metals, the neutral gold complex [Au(etdt)2]·THF (2) contains a solvent molecule of tetrahydrofuran (THF). The crystals of 2 form a two-dimensional conducting layer structure, which are separated by the terminal ethylene groups and THF molecules. The fairly high room-temperature conductivity of 0.2 S/cm and semiconducting behavior with a low activation energy of 0.1 eV of 2, is consistent with the result of the density functional theory band structure calculations. The observed non-magnetic behavior of 2 is caused from the dimeric structure of [Au(etdt)2] molecules.

Highlights

Introduction(TMTSF = tetramethyltetraselenafulvalene)—the first molecular organic superconductor [2], and λ(BETS) FeCl4 (BETS = bis(ethylenedithio)tetraselenafulvalene)—a field induced superconductor [3,4]
Since the discovery of the first molecular metal, TTF-TCNQ (TTF = tetrathiafulvalene, TCNQ = tetracyanoquinodimethane) charge transfer complex in 1973 [1], many various types of molecular conductors have been reported, including famous examples such as (TMTSF)2 PF6(TMTSF = tetramethyltetraselenafulvalene)—the first molecular organic superconductor [2], and λ(BETS)2 FeCl4 (BETS = bis(ethylenedithio)tetraselenafulvalene)—a field induced superconductor [3,4].These traditional charge transfer-based molecular conductors inherently consist of more than one kind of molecule, a donor as well as an acceptor
For single-component molecular conductor [M(L)2 ] systems, an important characteristic is that its electronic structure can be widely tuned by exchanging the central transition metal atom (M) for another transition metal atom, even among isostructural systems

Summary

Introduction

(TMTSF = tetramethyltetraselenafulvalene)—the first molecular organic superconductor [2], and λ(BETS) FeCl4 (BETS = bis(ethylenedithio)tetraselenafulvalene)—a field induced superconductor [3,4]. These traditional charge transfer-based molecular conductors inherently consist of more than one kind of molecule, a donor as well as an acceptor. A number of single-component molecular conductors have been reported, such as [Au(Me-thiazdt)2 ]. For single-component molecular conductor [M(L)2 ] systems, an important characteristic is that its electronic structure can be widely tuned by exchanging the central transition metal atom (M) for another transition metal atom, even among isostructural systems.

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Conclusion