A novel BEDT-TTF-based purely organic magnetic conductor, α - (BEDT - TTF)2(TEMPO - N(CH3)COCH2SO3) ⋅ 3H2O

Akutsu, Hiroki; Yamada, Jun−ichi; Nakatsuji, Shin’ichi; Turner, Scott S.

doi:10.1016/j.ssc.2006.07.034

Cited by 20 publications

(19 citation statements)

References 42 publications

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“…The magnetic data can be fitted by the combination of a Curie–Weiss ( C = 0.721 emu K mol –1 ) and 2D Heisenberg (2DH) models with θ = –5.5 K and J 2DH = –80.3 K. This suggests that the spins of the Fc moieties and BEDT‐TTF layers obey 2D Heisenberg and Curie–Weiss models, respectively. The J 2DH value of –80.3 K caused by the interaction between spins on the BEDT‐TTF layers almost corresponds to those observed in other salts having 2D magnetic BEDT‐TTF layers , . The spins seem to form a square lattice and to interact with each other along the a and b directions (see Figure b).…”

Section: Resultssupporting

confidence: 70%

“…375) of 1.096 emu K mol –1 , suggesting that the stable radical parts and also the BEDT‐TTF layers possess spins. Since the observed χT value is approximately 0.1 emu K mol –1 smaller than the expected value, this implies that there are strong antiferromagnetic interactions, which are usually observed between spins on BEDT‐TTF layers , . These results support the hypothesis that spins are located on the BEDT‐TTF layers.…”

Section: Resultssupporting

confidence: 63%

“…Figure d shows S ··· O contacts between BEDT‐TTF and –SO 3 shorter than the van der Waals distance of 3.37 Å. In our previously reported sulfonate salts that are in the charge disproportionation state, the donor having the shortest S ··· O contact has the largest positive charge probably because the state has the largest Madelung potential . However, this salt does not conform to the same charge distribution.…”

Section: Resultsmentioning

confidence: 79%

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Structure and Properties of a BEDT‐TTF‐Based Organic Conductor with a Ferrocene‐Based Magnetic Anion Octamethylferrocenedisulfonate

et al. 2018

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The structure and properties of a new semiconducting BEDT-TTF-based charge-transfer salt containing the mag-The salt is a [a] 3252 MPMS-5S magnetometer. The measurement was not corrected for sample holder (aluminium foil) nor for the Pascal diamagnetism. However, the sum of these contributions was taken into consideration as a temperature independent term obtained from the curve fitting, which was used as a correction.

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Section: Resultssupporting

confidence: 70%

Section: Resultssupporting

confidence: 63%

Section: Resultsmentioning

confidence: 79%

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Structure and Properties of a BEDT‐TTF‐Based Organic Conductor with a Ferrocene‐Based Magnetic Anion Octamethylferrocenedisulfonate

et al. 2018

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“…This is now in progress. In addition, the activation energy of 3 is significantly lower than other magnetic salts [28][29][30], suggesting the existence of some doping effect or electron transport via the S· · · O contact.…”

Section: Resultsmentioning

confidence: 92%

A New BEDT-TTF-Based Organic Charge Transfer Salt with a New Anionic Strong Acceptor, N,N'-Disulfo-1,4-benzoquinonediimine

et al. 2012

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Abstract:A novel organic dianion, N,N'-Disulfo-1,4-benzoquinonediimine (1) has been prepared, which is a strong electron acceptor. The reduction potential of the PPh 4 salt indicates that 1 is a stronger acceptor than DDQ (2,3-dichloro-5,6-dicyano-1,4-benzoquinone). The dianionic acceptor provided a BEDT-TTF salt, (BEDT-TTF) 4 1· 3H 2 O, the structures and physical properties of which are reported.

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“…(TEMPO) [7][8][9][10][11][12], 2,2,5,5-tetramethylpyrrolidin-1-oxyl (PROXYL) [13] or 2,2,5,5-Tetramethyl-3-pyrrolin-1-oxyl (PO) [14][15][16][17][18]). Of the salt that we have obtained, none showed a significant interplay between the conducting and localized electrons.…”

Section: Introductionmentioning

confidence: 99%

New Dmit-Based Organic Magnetic Conductors (PO-CONH-C2H4N(CH3)3)[M(dmit)2]2 (M = Ni, Pd) Including an Organic Cation Derived from a 2,2,5,5-Tetramethyl-3-pyrrolin-1-oxyl (PO) Radical

2017

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Abstract:We have prepared two dmit-based salts with a stable organic radical-substituted ammonium cation, (PO-CONH-C 2 H 4 N(CH 3 ) 3 )[Ni(dmit) 2 ] 2 ·CH 3 CN and (PO-CONH-C 2 H 4 N(CH 3 ) 3 )[Pd(dmit) 2 ] 2 where PO is 2,2,5,5-Tetramethyl-3-pyrrolin-1-oxyl and dmit is 2-Thioxo-1,3-dithiol-4,5-dithiolate. The salts are not isostructural but have similar structural features in the anion and cation packing arrangements. The acceptor layers of both salts consist of tetramers, which gather to form 2D conducting layers. Magnetic susceptibility measurements indicate that the Ni salt is a Mott insulator and the Pd salt is a band insulator, which has been confirmed by band structure calculations. The cationic layers of both salts have a previously unreported polar structure, in which the cation dipoles order as ÀÄÀÄ along the acceptors stacking direction to provide dipole moments. The dipole moments of nearest neighbor cation layers are inverted in both salts, indicating no net dipole moments for the whole crystals. The magnetic network of the [Ni(dmit) 2 ] layer of the Ni salt is two-dimensional so that the magnetic susceptibility would be expected to obey the 1D or 2D Heisenberg model that has a broad maximum around T ≈ θ. However, the magnetic susceptibility after subtraction of the contribution from the PO radical has no broad maximum. Instead, it shows Curie-Weiss behavior with C = 0.378 emu·K/mol and θ = −35.8 K. The magnetic susceptibility of the Pd salt obeys a Curie-Weiss model with C = 0.329 emu·K·mol −1 and θ = −0.88 K.

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A novel BEDT-TTF-based purely organic magnetic conductor, α - (BEDT - TTF)2(TEMPO - N(CH3)COCH2SO3) ⋅ 3H2O

Cited by 20 publications

References 42 publications

Structure and Properties of a BEDT‐TTF‐Based Organic Conductor with a Ferrocene‐Based Magnetic Anion Octamethylferrocenedisulfonate

Structure and Properties of a BEDT‐TTF‐Based Organic Conductor with a Ferrocene‐Based Magnetic Anion Octamethylferrocenedisulfonate

A New BEDT-TTF-Based Organic Charge Transfer Salt with a New Anionic Strong Acceptor, N,N'-Disulfo-1,4-benzoquinonediimine

New Dmit-Based Organic Magnetic Conductors (PO-CONH-C2H4N(CH3)3)[M(dmit)2]2 (M = Ni, Pd) Including an Organic Cation Derived from a 2,2,5,5-Tetramethyl-3-pyrrolin-1-oxyl (PO) Radical

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