Pressure effect on the electrical conductivity and superconductivity of β-(BDA-TTP)2I3

Yamada, Jun−ichi; Fujimoto, Kazuya; Akutsu, Hiroki; Nakatsuji, Shin’ichi; Miyazaki, Akira; Aimatsu, M.; Kudo, Satoshi; Enoki, Toshiaki; Kikuchi, Kôichi

doi:10.1039/b516909g

Cited by 21 publications

(13 citation statements)

References 16 publications

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“…On the other hand, BDA-TTP conductors have a strong tendency to take β-type molecular packing. In these materials, intrastack interaction is smaller compared with that of typical β-type conductors and the degree of dimerization is very large, [98,[129][130][131].…”

Section: Ttp Donors With Reduced π-Electron Systemmentioning

confidence: 99%

Tetrathiapentalene-based organic conductors

Misaki

2009

Science and Technology of Advanced Materials

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The synthesis, structure and properties of tetrathiapentalene-based (TTP) organic conductors are reviewed. Among various TTP-type donors, bis-fused tetrathiafulvalene, 2,5-bis(1,3-dithiol-2-ylidene)-1,3,4,6-tetrathiapentalene (BDT-TTP) and its derivatives afford many metallic radical cation salts stable down to low temperatures, regardless of the size and shape of the counter anions. Most BDT-TTP conductors have a β-type donor arrangement with almost uniform stacks. Introduction of appropriate substituents results in molecular packing that differs from the β-type. A vinylogous TTP, 2-(1,3-dithiol-2-ylidene)-5-(2-ethanediylidene-1,3-dithiole)-1,3,4,6-tetrathiapentalene (DTEDT) has yielded an organic superconductor (DTEDT) 3 Au(CN) 2 as well as metallic radical cation salts, regardless of the counter anions. (Thio)pyran analogs of TTP, namely (T)PDT-TTP and its derivatives produce molecular conductors with novel molecular arrangements. A TTP analog with reduced π-electron system 2,5-bis(1,3-dithian-2-ylidene)-1,3,4,6-tetrathiapentalene (BDA-TTP) has afforded several organic superconductors. Highly conducting molecular metals with unusual oxidation states (+1, +5/3 and neutral) have been developed on the basis of 2,5-bis(1,3-dithiol-2-ylidene)-1,3,4,6-tetrathiapentalene (BDT-TTP) derivatives and analogous metal derivatives M(dt) 2 (M = Ni, Au).

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Section: Ttp Donors With Reduced π-Electron Systemmentioning

confidence: 99%

Tetrathiapentalene-based organic conductors

Misaki

2009

Science and Technology of Advanced Materials

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“…It is therefore expected that, compared to the conformational change in BEDT-TTF by a "twisting" motion, the conformational change in BDA-TTP by a "flapping" motion is more sensitive to the applied pressure. This expectation prompted a study of the hydrostatic-pressure and uniaxial-strain effects on β-(BDA-TTP) 2 I 3 [20,21]. …”

Section: Superconductivity In β-(Bda-ttp) 2 Imentioning

confidence: 99%

Chemical Modifications of BDH-TTP [2,5-Bis(1,3-dithiolan-2-ylidene)-1,3,4,6-tetrathiapentalene]: Control of Electron Correlation

Yamada

Akutsu

2012

Crystals

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Organic molecular conductors with a strongly correlated electron system, in which the itinerancy of electrons (or holes) and the electron correlation (U/W, U, the on-site Coulomb repulsion, W, the bandwidth) compete with each other, are promising candidates for achieving superconductivity and also for exploring remarkable physical properties induced by external stimuli such as pressure, light, voltage and current. Our synthetic approach to the construction of strongly correlated organic electron systems is based on chemical modifications to the donor molecule BDH-TTP [2,5-bis(1,3-dithiolan-2-ylidene)-1,3,4,6-tetrathiapentalene] capable of producing metallic CT (charge-transfer) salts stable down to low temperatures (4.2-1.5 K). This aims at enhancing the electron correlation in the itinerant electron system by decreasing the bandwidth. Chemical modifications of BDH-TTP such as ring expansion of two outer dithiolane rings, replacement of one sulfur atom in an outer dithiolane ring with an oxygen atom and introduction of two methyl substituents into an outer ditiolane ring led to BDA-TTP [2,5-bis(1,3-dithian-2-ylidene)-1,3,4,6-tetrathiapentalene], DHOT-TTP [2-(1,3-dithiolan-2-ylidene)-5-(1,3-oxathiolan-2-ylidene)-1,3,4,6-tetrathiapentalene] and DMDH-TTP [2-(4,5-dimethyl-1,3-dithiolan-2-ylidene)-5-(1,3-dithiolan-2-ylidene)-1,3,4,6-tetrathiapentalene], respectively. In this review, the physical properties and the crystal and electronic structures of molecular conductors derived from these donor molecules will be described. OPEN ACCESSCrystals 2012, 2 813

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“…In the present study, we describe the syn thesis, crystal structures, and conducting and magnetic properties of two new BDH TTP based radical cation salts with the [CuCl 4 ] 2anion: κ (BDH TTP) 4 (2).…”

mentioning

confidence: 99%

New molecular magnetic metals: κ-(BDH-TTP)4CuCl4·(H2O) n and κ-(BDH-TTP)2[CuCl4]0.67·(H2O)0.33 (BDH-TTP is 2,5-bis(1,3-dithiolan-2-ylidene)-1,3,4,6-tetrathiapentalene)

et al. 2010

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Pressure effect on the electrical conductivity and superconductivity of β-(BDA-TTP)2I3

Abstract: The pressure-induced electrical conductivity properties of beta-(BDA-TTP)2I3 have been investigated; the salt exhibits a dramatic change in the conductivity behaviour above ca. 10 kbar and undergoes a superconducting transition with an onset near 10 K.

Cited by 21 publications

References 16 publications

Tetrathiapentalene-based organic conductors

Tetrathiapentalene-based organic conductors

Chemical Modifications of BDH-TTP [2,5-Bis(1,3-dithiolan-2-ylidene)-1,3,4,6-tetrathiapentalene]: Control of Electron Correlation

New molecular magnetic metals: κ-(BDH-TTP)4CuCl4·(H2O) n and κ-(BDH-TTP)2[CuCl4]0.67·(H2O)0.33 (BDH-TTP is 2,5-bis(1,3-dithiolan-2-ylidene)-1,3,4,6-tetrathiapentalene)

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