We demonstrate the nonaqueous self-assembly of a low-molecular-mass organic gelator based on an electroactive p-type tetrathiafulvalene (TTF)-dipeptide bioconjugate. We show that a TTF moiety appended with diphenylalanine amide derivative (TTF-FF-NH2) self-assembles into one-dimensional nanofibers that further lead to the formation of self-supporting organogels in chloroform and ethyl acetate. ...

2014 The nuclear spin-lattice relaxation of methyl-protons in (TMTSF)2ClO4 is measured versus temperature between 330 and 40 K. The relaxation from the hyperfine coupling to the itinerant electrons is found to be dominant above 200 K. Similar conclusions apply to (TMTSF)2PF6. At 300 K two regimes of relaxation are identified versus magnetic field : (i) a low-field regime (2-25) kOe where 1/T1 i...

We report a strategy for realizing tunable electrical conductivity in metal-organic frameworks (MOFs) in which the nanopores are infiltrated with redox-active, conjugated guest molecules. This approach is demonstrated using thin-film devices of the MOF Cu3(BTC)2 (also known as HKUST-1; BTC, benzene-1,3,5-tricarboxylic acid) infiltrated with the molecule 7,7,8,8-tetracyanoquinododimethane (TCNQ)...

Cocrystallization of 7,7?,8,8?-tetracyanoquinodimethane radical anion (TCNQ–•) and 3-methylpyridinium-1,2,3,5-dithiadiazolyl cation (3-MepyDTDA+•) afforded isostructural acetonitrile (MeCN) or propionitrile (EtCN) solvates containing cofacial ? dimers homologous components. Loss lattice solvent from the diamagnetic above 366 K affords a high-temperature paramagnetic phase discrete TCNQ–• weakly...

To realize the origin of efficient spin injection at organic-ferromagnetic contact in organic spintronics, we have implemented the formation of quasi-molecular magnet via surface restructuring of a strong organic acceptor, tetrafluoro-tetracyano-quinodimethane (F4-TCNQ), in contact with ferromagnetic cobalt. Our results demonstrate a spin-polarized F4-TCNQ layer and a remarkably enhanced magnet...

We report the preparation and the spectroscopic properties of Langmuir-Blodgett films obtained by mixing in the same monolayer a polar amphiphilic octadecyl tetracyanoquinodimethane (Cj~TCNQ) and an ionic semi-amphiphilic (Cj~s~dithiolium-TCNQ compound. A cluster approach is used for the interpretation of the electronic charge transfer band and of the vibronic features in infrared as a result o...

By means of first-principles computations, we first propose a simple and effective strategy through the molecular charge transfer via noncovalent π-π interaction to modulate the electronic and magnetic properties of zigzag SiC nanoribbons (zSiCNRs). This charge transfer is induced by adsorbing the electron-withdrawing/donating tetracyanoquinodimethane (TCNQ) or tetrathiafulvalene (TTF) molecule...

By the end of the 20th century, the research of electromagnetic behavior of π-electrons in organic crystals made several outstanding achievements. Since 50’s, the epoch-making finding appeared every decade: enhanced conductivity in halogen complexes of aromatic hydrocarbons 1) (1954), highly conductive radical salts of a π-acceptor TCNQ 2) (1960), a charge transfer complex TTF-TCNQ with quasi-o...

Two simple, fast, and accurate spectrophotometric methods for the determination of alendronate sodium are described. The methods are based on charge-transfer complex formation of the drug with two π-electron acceptors 7,7,7,8-tetracyanoquinodimethane (TCNQ) and 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) in acetonitrile and methanol medium. The methods are followed spectrophotometrically by...

2014 We examine the Ginzburg-Landau model for the Peierls instability in HMTTFTCNQ and show that the three-dimensional ordering is dominated by the diagonal coupling between TCNQ chains in the alternating chain lattice. The transverse wave vector can be incommensurate and nearly constant in the wide temperature range below a common critical temperature (50 K) for both families of chains. We fin...