The Luttinger surface of an organic metal (TTF-TCNQ), possessing charge order and spin-charge separated band dispersions, is investigated using temperature-dependent angle-resolved photoemission spectroscopy. The Luttinger surface topology, obtained from momentum distribution curves, changes from quasi-2D (dimensional) to quasi-1D with temperature. The high temperature quasi-2D surface exhibits...

Herein we present two new organic co-crystals obtained through a simple solution growth process based on an acetamidophenol molecule, either paracetamol or metacetamol, and 7,7,8,8-tetracyanoquinodimethane (TCNQ). These are part of family potential charge transfer complexes, where the molecule behaves as electron donor TCNQ acceptor. Due to sub-micron size crystalline domains, 3D diffraction wa...

In this work, we investigated an organic semiconductor based on zinc 8-hydroxyquinoline (ZnQ2) and tetracyanoquinodimethane (TCNQ), which can be used as a photoactive layer in devices. The was optimized by applying density-functional theory (DFT) methods, four hydrogen bridges were formed between ZnQ2 TCNQ. Later, thin films of ZnQ2-TCNQ successfully deposited. structurally morphologically char...

We have measured the Hall effect on recently synthesized single crystals of the quasi-one-dimensional organic conductor TTF-TCNQ (tetrathiafulvalene-tetracyanoquinodimethane), a well known charge transfer complex that has two kinds of conductive stacks: the donor (TTF) and the acceptor (TCNQ) chains. The measurements were performed in the temperature interval 30 K < T < 300 K and for several di...

The 4:1 complex salt formed between 7,7,8,8-tetracyano-p-quinodimethane (TCNQ) and the N,N'-di(n-propyl)-4,4 ' -bipyridinium dication (DPrBP) is monoclinic, space group P21 /c , with a = 1 3 . 3 3 4 ( l ) , b = 25.954(3), c = 7.877(1) A, 0 = 93.66(1)°. The structure was solved by the Patterson method and refined to R = 0.070 for 3277 unique reflections. The T C N Q moieties stack plane-to-plane...

The bifunctional salt [Co(terpy)2](TCNQ)3·CH3CN (terpy = 2,2';6',2''-terpyridine, TCNQ = 7,7,8,8-tetracyanoquino-dimethane) exhibits a high room temperature conductivity of 0.13 S cm-1 and an anomaly in conductivity at ∼190 K as evidenced by variable temperature structural, magnetic and conductivity studies. The anomaly in the conductivity at 190 K has been correlated with the temperature depen...

2014 By reconsidering recent X-ray results, evidence is presented for a noticeable temperature dependence of the charge distribution on the two non-equivalent sites TCNQ A and TCNQ B in a conducting column of TEA(TCNQ)2. In particular, a simple law of the form : qA = (1/2 + To/T) e and qB = (1/2 To/T) e, with To = 24 K, well accounts for this dependence, giving the remarkable limit : qA = qB = ...

Pressure dependence of the charge distribution along the columns of tetracyanoquinodimethane (TCNQ) molecules in Cs2TCNQ3, which is a semiconducting 1/3-filled Hubbard system with the optical energy gap of 0.3 eV at ambient conditions, has been studied by the infrared and visible absorption experiments. An electronic phase transition is found to occur at around 3.5 GPa, in accordance with the p...

The formation of the conductive TTF-TCNQ (tetrathiafulvalene– tetracyanoquinodimethane) charge-transfer salt via rupture of microencapsulated solutions of its individual components is reported. Solutions of TTF and TCNQ in various solvents are separately incorporated into poly(urea-formaldehyde) core–shell microcapsules. Rupture of a mixture of TTF-containing microcapsules and TCNQ-containing m...

The fieldand temperature dependence of the charge transport in solution-processed poly[2-methoxy-5-(20-ethylhexyloxy)-p-phenylene vinylene] (MEH-PPV) doped with tetrafluoro-tetracyanoquinodimethane (F4-TCNQ) is investigated. Conventional charge transport models based on a densityand field-dependent mobility in combination with a constant background hole density from the dopant do not explain th...