Organic donor-inorganic acceptor salts

Dithiafulvene derivatives behave as -electron donors and form stable charge-transfer complexes and radical ion salts with a wide variety of organic and inorganic acceptor species. 

Charge-Transfer Salts. Most charge-transfer salts can be prepared by direct mixing of donors and acceptors in solution. Semiconducting salts of TCNQ have been prepared with a variety of both organic and inorganic counterions. Simple salts of the type TCNQ can be obtained by direct reaction of a metal such as copper or silver with TCNQ in solution. Solutions of metal iodides can be used in place of the metals, and precipitation of the TCNQ salt occur direcdy (24). 

Numerous published reports show that additions of electrolytes or salts to solutions of charged electron-donor or acceptor complexes dramatically alter rates of charge- or electron-transfer processes/ In electron-transfer oxidations of organic or inorganic substrates by negatively charged acceptors, additions of alkali-metal cations generally result in increases in electron-transfer rates. While examples include reductions of classical... 

All these data verify that in real systems, the rate of electron transfer between components of a conductive chain is high. There are states of a mixed valence. Enhanced electric conductivity and other unusual physical properties are widespread among those inorganic or coordination compounds that contain metals in intermediate -valence states. In cases of organic metals, nonstoi-chiometric donor/acceptor ratios provide even better results. For example, the salt of (TTF)i (Br)oj composition displays an electric conductivity of 2 X 10 cm while (TTF)i(Br)i salt does not... 

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