Single-Component Molecular Conductors

Kobayashi, Akiko; Kobayashi, Hayao

doi:10.1080/15421400600697859

Cited by 3 publications

(7 citation statements)

References 12 publications

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“…The S-S contacts are 3.44-3.75 Å. The structural features suggest that the complex is a three-dimensional (3D) anisotropic solid [46] Briefly, the examples of structures given herein and those described elsewhere (see and references therein) show the existence of a variety of three and low dimensional networks formed from short or large M-S, S-S, etc. contacts.…”

Section: Structural Propertiesmentioning

confidence: 99%

“…Also, crystals of neutral complexes with an extended TTF-dithiolato ligand have been obtained by electroxidation of the corresponding monoanionic or/and the dianionic complexes. (see [22,23,43,45,46]). …”

Section: Growth and Morphology Of Crystalsmentioning

confidence: 99%

“…Tables 5-8 give the E 1/2 (2−/1−), E 1/2 (1−/0) and E(0/x+) (in V versus Ag/AgCl) as well as other electrochemical and OA data observed at room temperature from a number of selected M 1,2-DTs and selenium analogues. The difference E(0/x+) − E 1/2 (1−/0) ≈ E onset ox − E onset rd = ΔE is a measure of the electronic energy gap of the materials in solutions or suspensions [45,46,63,64,77,79]. One can see that the results from electrochemical measurements (of solutions, E g elc ) are in agreement with the optical absorption E onset opt of solutions in CS 2 , while there is a large deviation from the data in the solid state (OA max and E onset opt of deposits or pellets), as well as from the electrical measurements (E g el ) (see below).…”

Section: Chemical and Electrochemical Propertiesmentioning

confidence: 99%

“…More information concerning the ligands of Table 2 can be found in the corresponding references for L1 [34], L2 [34,98], L3 [33,95,102], L4 [56,73,102], L5 [97], L6 [61], L7 [75], L8 [58,60], L9 [56,60,79,84,101,110,111], L10 [38,62,65,79,101,102,110], L11 [109,113], L12 [93,102], L13 [114], L15 [33,102,114], L16 [57,102], L17 [102], and L18 [93,102]. More information concerning the ligands of Table 3 can be found in the references [22,23,30,45,46,…”

Section: Introductionmentioning

confidence: 99%

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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: Structural Propertiesmentioning

confidence: 99%

Section: Growth and Morphology Of Crystalsmentioning

confidence: 99%

Section: Chemical and Electrochemical Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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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“…These neutral complexes enabled the establishment of a new paradigm of molecular conductors where free carriers and metallic properties can be generated in molecular compounds based on a neutral single-component by a mechanism characteristic of semi-metals. The requirements for such properties were soon established as a small HOMO-LUMO energy gap and strong 3D intermolecular interactions [ 4 , 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

Gold and Nickel Extended Thiophenic-TTF Bisdithiolene Complexes

et al. 2018

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Gold and nickel bisdithiolene complexes with methyl and tert-butyl substituted thiophenetetrathiafulavalenedithiolate ligands (α-mtdt and α-tbtdt) were prepared and characterized. These complexes were obtained, under anaerobic conditions, as tetrabutylammonium salts. The diamagnetic gold monoanion (n-Bu4N)[Au(α-mtdt)2] (3) and nickel dianionic species (n-Bu4N)x[Ni(α-mtdt)2] (x = 1,2) (4) were similar to the related non-substituted extended thiophenic-TTF (TTF = tetrathiafulvalene) bisdithiolenes. However the introduction of the large, bulky substituent tert-butyl, led to the formation of a Au (I) dinuclear complex, (n-Bu4N)2[Au2(α-tbtdt)2] (5). The neutral methyl substituted gold and nickel complexes were easily obtained through air or iodine exposure as polycrystalline or amorphous fine powder. [Au(α-mtdt)2] (6) and [Ni(α-mtdt)2] (7) polycrystalline samples display properties of a metallic system with a room temperature electrical conductivity of 0.32 S/cm and ≈4 S/cm and a thermoelectric power of ≈5 µV/K and ≈32 µV/K, respectively. While [Au(α-mtdt)2] (6) presented a Pauli-like magnetic susceptibility typical of conducting systems, in [Ni(α-mtdt)2] (7) large magnetic susceptibilities indicative of high spin states were observed. Both electric transport properties and magnetic properties for gold and nickel [M(α-mtdt)2] are indicative that these compounds are single component molecular conductors.

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Synthesis and Magnetic Properties of a Highly Conducting Neutral Nickel Complex with a Highly Conjugated Tetrathiafulvalenedithiolate Ligand

Wen

Song

et al. 2007

Inorg. Chem.

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A neutral nickel complex with the extended tetrathiafulvalene-4,5-dithiolate ligand benzotetrathiafulvalenedithiolate (btdt2-) is synthesized and characterized. From the structural analysis, the neighboring molecules in this complex are stacked in a different way compared to the previously reported single-component metal [Ni(tmdt)2]. The computational studies confirm that the difference in molecular packing results in the variance of conductivity.

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Single-Component Molecular Conductors

Cited by 3 publications

References 12 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

Gold and Nickel Extended Thiophenic-TTF Bisdithiolene Complexes

Synthesis and Magnetic Properties of a Highly Conducting Neutral Nickel Complex with a Highly Conjugated Tetrathiafulvalenedithiolate Ligand

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