Structural, electrical, magnetic, and optical properties of bis-benzene-1,2-dithiolato-Au(IV) crystals

Schiødt, Niels Christian; Bjørnholm, Thomas; Bechgaard, K.; Neumeier, J. J.; Allgeier, C.; Jacobsen, Claus Schelde; Thorup, Niels

doi:10.1103/physrevb.53.1773

Cited by 66 publications

(52 citation statements)

References 30 publications

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“…The experimental values of transitions, i.e., the band position and intensity of OA bands, have been found to be in reasonable agreement with the theoretically calculated ones [18,34]. The splitting of the low frequency band is more discreet in the OA (and reflectance) spectra of the complexes in the solid state (see for example [29] and refs. [9][10][11] cited therein).…”

Section: Optical Propertiessupporting

confidence: 77%

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

2012

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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

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Section: Optical Propertiessupporting

confidence: 77%

“…Generally, the OA bands of neutral Au 1,2-DTs occur at lower frequencies, even, than those of monoanionic salts of Ni, Pd and Pt, which are isoelectronic (see Figures 17 and 18 for examples) [63,70]. The OA and reflectance bands of single crystals of [Au(bdt) 2 ] occur close to 2000 nm [29]. [63,70].…”

Section: Optical Propertiesmentioning

confidence: 99%

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

2012

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“…. [25] The latter system was most accurately described in a strong coupling limit (Hubbard U » 4t) where the activated part of the magnetic susceptibility was attributed to an antiferromagnetically coupled Bonner±Fischer chain affected by dimerizing. [25] The similarities of electronic behaviors in both complexes clearly indicate that the strong coupling limit most probably also applies for 5, as discussed below in section 2.3.…”

Section: [Hso 4 ] 2 and [Ni(dddt) 2 ] 3 [Hsomentioning

confidence: 99%

“…. [25] While [Au(bdt) 2 ] . has a lower RT conductivity (10 ±3 S cm ±1 ) and larger activation energy (0.30 eV) than 5,…”

Section: Electronic Structure Of the Radical Gold Complex Based Matermentioning

confidence: 99%

Fluorine Segregation Controls the Solid-State Organization and Electronic Properties of Ni and Au Dithiolene Complexes: Stabilization of a Conducting Single-Component Gold Dithiolene Complex

Dautel¹,

Fourmigué²,

Canadell³

et al. 2002

Adv. Funct. Mater.

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Electrooxidation of the nickel dithiolene complex [Ni(F2pdt)2]–· (F2pdt2‐: 6,6‐difluoro‐6,7‐dihydro‐5H‐[1,4]dithiepine‐2,3‐dithiolato) affords the corresponding neutral complex [Ni(F2pdt)2]0 whose layered structure is highly reminiscent, albeit not isostructural, of that of the isosteric fluorinated bis(propylenedithio)tetrathiafulvalene and characterized by a segregation of the fluorinated moieties into fluorous bilayers. The gold neutral complex [Au(F2pdt)2]·, which is isostructural with the fluorinated bis(propylenedithio)tetrathiafulvalene, was prepared by electrocrystallization of the [n‐Bu4N][Au(F2pdt)2] salt. [Au(F2‐pdt)2]· is a semiconductor with high room temperature conductivity. The origin of this semiconducting behavior as well as possible guidelines in order to realize metallic conductivity in gold dithiolene neutral molecular solids are discussed.

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“…In contrast to neutral bis(dithiolato)nickel complexes, neutral bis(dithiolato)gold complexes have one unpaired electron per complex, which means they may exhibit attractive electromagnetic properties. [2,[8][9][10] ESR spectra and magnetic susceptibility measurements, for instance, have revealed that [Au(tmdt) 2 ] undergoes an antiferromagnetic (AF) phase transition at around 110 K, [11,12] and a 1 H NMR study has shown a steep increase in the NMR linewidth and a peak due to 1/T 1 at around 110 K. [13] These observations provide microscopic evidence for a magnetic phase transition. The observed variation of 1/T 1 indicates a highly correlated nature of the metallic phase.…”

Section: Introductionmentioning

confidence: 92%

Structures and Physical Properties of Highly Conducting Single‐Component Molecular Conductors Containing Se Atoms

et al. 2009

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Structural, electrical, magnetic, and optical properties of bis-benzene-1,2-dithiolato-Au(IV) crystals

Cited by 66 publications

References 30 publications

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

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

Fluorine Segregation Controls the Solid-State Organization and Electronic Properties of Ni and Au Dithiolene Complexes: Stabilization of a Conducting Single-Component Gold Dithiolene Complex

Structures and Physical Properties of Highly Conducting Single‐Component Molecular Conductors Containing Se Atoms

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