Conductors organic

In 1972, the first stable organic conductor was reported, one of the forms of TCNQ, TetraCyaNo-Quinodimethane. Its room-temperature conductivity was... 

A large number of DTDAFs ( electron-rich olefins ) described above are very efficient donors, e.g., for their application in organic conductors however they are highly sensitive to air. Studies aimed at the preparation of such compounds, especially the aliphatic ones, have so far met with only limited success. For example, a few alkyl-substituted DTDAF derivatives could be detected electrochemically, but an attempt to isolate one of these only led to oxidation products (91JA985). Similarly, an elec-... 

M. Scholl in Organic Conductors Fundamentals and Applications (Ed. J.P. Farges), Marcel Dekkcr, New York 1994, p. 539. 

Carrier generators in molecular conductors have been associated for a long time to a partial charge transfer between the HOMO (or LUMO) electronic band and other chemical species. These systems are known as two-component molecular conductors. Tetrathiofulvalene derivatives are versatile systems for the formation of molecular organic conductors due to their electron donor capacity by transferring one u-electron from the HOMO orbital, and to their planar shape that promotes their stacking as a consequence of the n-n orbital overlap. The electronic properties of these salts are essentially determined by the packing pattern of the donor molecules which, in turn, depends on the counter-ion. 

Since the discovery of the first organic conductors based on TTF, [TTF]C1 in 1972 [38] and TTF - TCNQ in 1973 [39], TTF has been the elementary building block of hundreds of conducting salts [40] (1) charge-transfer salts if an electron acceptor such as TCNQ is used, and (2) cation radical salts when an innocent anion is introduced by electrocrystallization [41]. In both cases, a mixed-valence state of the TTF is required to allow for a metallic conductivity (Scheme 5), as the fully oxidized salts of TTF+ cation radicals most often either behave as Mott insulators (weakly interacting spins) or associate into... 

Kagoshima S, Kanoda K, Mori T (eds) (2006) Organic conductors, special topics section. J Phys Soc Jpn 75... 

Jerome D, Mazaud A, Ribault M, Bechgaard K (1980) Superconductivity in a synthetic organic conductor, (TMTSF)2PF6. J Phys Lett 41 L95-L97... 

Since our earlier review1 appeared not so long ago, it makes no sense to repeat here all facets of the radialene family. Therefore, we focus here on the synthesis and chemical transformation of the radialenes, and we suggest the reader consult our earlier review for information on structural and spectroscopic data as well as the use of radialenes as building blocks for organic conductors and organic ferromagnets, as these topics will not... 

The processible organic conductors, semiconductors, and insulators (not discussed in this chapter but well known historically for saturated polymers with sp3 electronic configuration) form fundamental material set for device applications. In the following sections, we discuss how to construct a PLED with such material set. 

The problem of preparation of pure ion-radical salts in solid state is very important technically. This problem is decisive in new application fields snch as organic conductors, semiconductors, and magnets. Especially, Chapter 8 of this book considers methods for the preparation of solid ion-radical salts for these materials. 

Some organic conductors can become superconductors under certain conditions. Superconductivity is the disappearance of electrical impedance that allows electric current to flow without any loss of energy. Organic metals were reviewed in many sources (see, e.g., Khideckef and Zhilyaeva... 

The organic conductor properties of tetrathiaflulvalenetetracyanoquino-dimethane (TTF-TCNQ) as a material for constructing electrodes, viz. its catalytic response and resistance to passivation, are of special interest for the determination of biological compounds, which usually have slow electrode kinetics and a low sensitivity, and tend to foul electrode surfaces. The response of a TTF-TCNQ microarray sensor inserted in a flow system for... 

Charge ordering below 220 K has also been found, in the organic conductor (DI-DCNQI)2Ag (Hiraki Kanoda, 1998). 

Scheme 2 Chemical structures of closed shell molecules of organic conductors...

Table 1 Selected organic conductors of closed shell molecules...

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