We report here the first measurements showing directly the existence of a Peierls gap, 2Ap, on the TCNQ chains of Qn(TCNQ)2, a quarter-filled band quasi-one<limensional conductor with strong on-site electron-electron correlations ('large U') and disorder on the cation chains. The temperature dependence, Ap(T), obtained from the T-dependence of the a~ mode absorption of TCNQ, shows that the gap ...

2014 Proton NMR lines have been recorded at 250 MHz in different selectively deuterated TTF and TCNQ compounds. An evaluation of the isotropic hyperfine coupling (a) is obtained from the paramagnetic shift of the line, while the second moment leads to an experimental determination of the dipolar coupling (d). It is established that the dipolar coupling for TTF and TCNQ protons is not at all neg...

Two isostructural 2D assemblies composed of [Ru2(O2CCF3)4] and TCNQ or TCNQF4 in a 2:1 ratio were synthesized: [{Ru2(O2CCF3)4}2TCNQ].3(p-xylene) (1b) and [{Ru2(O2CCF3)4}2TCNQF4].3(p-xylene) (2). In 1b, the TCNQ moiety is assigned to be neutral because of no significant electron transfer from the Ru24+ units. Therefore, the magnetic property of 1b can be understood to be a paramagnetic nature of...

Transport properties of a strongly correlated organic conductor (CHC)TCNQ were examined under high pressures up to about 7 GPa using a diamond anvil cell, where CHC denotes hemiprotonated cytosine pair and TCNQ represents 7,7,8,8tetracyanoquinodimethane. This salt is a highly conductive semiconductor as a fully ionic TCNQ salt with the activation energy Ea of 0.14 eV at ambient pressure. Applic...

Ionophore complexes of K(TCNQ˙ − )(TCNQ 0 ) n adopt a variety stacking motifs such as wave-like infinite TCNQ columns separated by K + -cryptates (left) and -π-dimerised cation slipped stacks (right).

We characterize individual Ag-TCNQ nanocrystals during switching their resistivity state in operando. Raman and soft X-ray absorption microspectroscopy are employed to disclose the electronic state of the organic component in dependency of applied voltage. Whereas Raman microspectroscopy offers qualitative insight into the conversion of negatively charged TCNQ molecules to their neutral counter...

Applications of organic compounds-based electrodes in aqueous zinc-ion batteries (AZIBs) at low temperatures are severely restricted by the freezing electrolytes and inferior dynamic behavior below zero. Herein, tetracyanoquinodimethane (TCNQ) was purified sublimation method used as a cathode AZIBs to investigate electrochemical Zn storage performance comparison with nonpurified TCNQ temperatur...

A green approach for the preparation of water-dispersible functionalized graphene via one-step electrochemical exfoliation of graphite using 7,7,8,8-tetracyanoquinodimethane (TCNQ) anions as surface modifiers and electrolytes was described. TCNQ is an organic charge-transfer complex with electron accepting and noteworthy electrical properties. The exfoliation of graphite to a few-layer graphene...

Transparent conductive films (TCFs) are critical components of a myriad of technologies including flat panel displays, light-emitting diodes, and solar cells. Graphene-based TCFs have attracted a lot of attention because of their high electrical conductivity, transparency, and low cost. Carrier doping of graphene would potentially improve the properties of graphene-based TCFs for practical indu...

Controlling supramolecular self-assembly is a fundamental step towards molecular nanofabrication, which involves a formidable reverse engineering problem. It is known that a variety of structures are efficiently obtained by assembling appropriate organic molecules and transition metal atoms on well-defined substrates. Here we show that alkali atoms bring in new functionalities compared with tra...