Copper-tetracyanoquinodimethane

Charge transfer complexes have also been investigated as the most attractive candidate materials for high-density electrical data storage.76,77 For instance, sil-ver-tetracyanoquinodimethane (Ag-TCNQ) and copper-tetracyanoquinodimethane (Cu-TCNQ) have been studied for data recording since they exhibit electrical bistability. 

There is a very short list of organic semiconductors with reported thin-film field-effect mobilities greater than 1 cm2 V-1 s h These include pentacene, sexithio-phene [5a], and anthradithiophene [17]. If we extend this list to include single crystal and n-type materials, we can add perylene [18], rubrene [19], copper phtha-locyanine (CuPc) [20], tetracyanoquinodimethane (TCNQ) [21], and dithiophene-tetrathiofulvalene (DT-TTF) [22] - still a short list. 

C30H16CuNg02, 7,7,8,8-Tetracyanoquinodimethane-copper(II) 8-hydroxy-quinolate complex, 32B, 286... 

For example, for a linear sweep of potential, we obtain curves as illustrated in Figure 1.13, which, upon differentiation, provides the corresponding cyclic voltammogram [130]. Of course, the same methodology can be used to study assisted-ion-transfer reactions such as the transfer of copper(II) assisted by 6,7-dimethyl-2,3-di(2-pyridyl)quinoxaline [131], acid-base reactions such the transfer of bromophenol blue [132], and to study electron transfer. Ding et al. have in this way confirmed that electron-transfer reactions between ferricyanide-ferrocyanide in water, and 7,7,8,8-tetracyanoquinodimethane (TCNQ) in 1,2-DCE, were heterogeneous [133,134]. 

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