Development and Application of New Electron Donors for Organic Metals

为了合成具有高导电性和超导电性的新型有机材料，我们课题组花了很大的努力来开发具有不同于四硫代戊烯骨架的新型电子给体，并估计这些新给体与熟悉的电子受体（如TCNQ）之间形成的电荷转移（CT）配合物的电学性质。<F_4> TCNQ和DDQ这两年。本研究新合成的给体有：乙二烷-2,2′-二（1,3-二硫基）(1)、乙二烷-2-（1,3-二硫基）-2′-（1,3-二烯基）(2)、乙二烷-2,2′-二（1,3-二烯基）(3)和四（1,3-二硫基）环丁烷的八碳甲氧基-(4a)、未取代-(4b)和四苯并-(4c)衍生物。除4a外，其余供体均与上述受体形成CT复合物。它们的配合物在压缩球团状态下的室温电导率在0.03 ~ 0.8 < ω ^(-1)> <cm^(-1)>，活化能相当小（0.04 ~ 0.09 eV）。

In order to synthesize new organic materials with a high electric conductivity and furthermore superconductivity, our research group had much effort to develop new types of electron donors with a different kind of skeleton from tetrathiafulvalene, and to estimate the electric properties of charge-transfer (CT) complexes formed between these new donors and familiar electron acceptors, e.g., TCNQ. <F_4> TCNQ and DDQ for these two years. The donors newly synthesized in this research are as follows: ethanediylidene-2,2'-bis(1,3-dithiole) (1), ethanediylidene-2-(1,3-dithiole)-2'-(1,3-diselenole) (2), ethanediylidene-2,2'bis(1,3-diselenole) (3), and octacarbomethoxy- (4a), unsubstituted- (4b) and tetrabenzo- (4c) derivatives of tetrakis(1,3-dithiol-2-ylidene)cyclobutane. Except for 4a, all the other donors formed the CT complexes with the above acceptors. The room temperature electric conductivities of their complexes in a compressed pellet state are in the range of 0.03-0.8 <omega^(-1)> <cm^(-1)> , and the activation energies are considerably small (0.04-0.09 eV).