Organic conducting salt

Conducting organic salt electrodes directly coupled to oxidases have been described such as, for example, A -methylphenazinium (NMP+) cation and tetracyanoquinodimethane (TCNQ-) anion as an electrode material for facilitating electron transfer of glucose oxidase47. Results with other salt cations, such as tetrathiafulvalene (TTF+) and quinoline (Q+), have been reported48. 

This type of mechanism has been proposed for a variety of different NADH oxidation systems, including phenoxazine dyes [35, 36], phenothia-zine dyes [39] and a conducting organic salt [40]. Experimental evidence for the formation of a complex during the chemical oxidation of NADH has been provided by Fukuzumi et al. [41]. These authors showed that a mixture of an NADH model compound and a quinone derivative formed a charge-transfer complex in solution as determined by UV/Vis spectros-... 

A new fused thienothiophene, 2,3 5,6-bis(ethylenedithio)thieno[3,2- >]thiophene (112), was used to prepare conducting organic salts (95BCJ1193). 

Functional molecules can also be immobiUzed by preparing a paste containing these molecules together with binders and conductive solid particles. The paste is used to coat a solid surface. Carbon pastes prepared in this way are frequently applied in electrochemical sensors. A special variant is the use of a conductive organic salt substituting carbon particles as well as the binder. Sensors with pastes are well suited for laboratory use, in particular if tests must be conducted. When used in commercial applications, commonly the paste is substituted by a screen-printed mixture of similar composition. Screen-printing inks generally also contain binders, conductive particles and dissolved functional substances. 

Alternatively to carbon pastes, conducting organic salts have been used to imbed bioactive components, in particular to immobilize enzymes. The redox mediator tetrathiofulvalene acts as electron donor and forms a solid, conducting salt with the electron acceptor tetracyanoquinodimethane. This salt has a low melting point and can be mixed with proteins to give a conducting... 

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