Electrical properties of TCNQ complex salts with polycations containing sulfur atoms in the main chain

Pęcherz, J.; Κryszewski, M.

doi:10.1002/actp.1983.010340105

Cited by 13 publications

(4 citation statements)

References 22 publications

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“…28 • 30 · 31 For simple salts K,' [x, Ar], E. values depend mostly on the electrostatic energy C which decreases with a decrease in the distance between the S + atoms (see Figure 4). For complex salts K, [x, Ar] the resistivity decreases until TCNQ 0 jTCNQ-,-reaches a value close to one (see ref 10,12,19) and because the proper distance between TCNQ molecules results in a greater overlapping of n orbitals the bandwidth increases. In this case, the activation energy takes on lower values except forK, [3,Ar] and K, [10,Ar] complexes for which the distances between S + are either small (three CH 2 groups) or too big (10 CH 2 groups).…”

Section: Resultsmentioning

confidence: 99%

Electrical Conductivity of 7,7,8,8-Tetracyanoquinodimethane Salts with Polycations Containing Sulfur Atoms and Aromatic Rings in the Main Chain

Pęcherz

Κryszewski

1983

Polym J

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ABSTRACT:Electrical properties of complex anion radical salts of 7,7,8,8-tetracyanoquinodimethane (TCNQ) with polycations of the following structure:were investigated. It was found that the resistivity of simple salts increases linearly with an increase in the distance between positively charged donor centres S +. For complex salts, the increase in the distance between s+ atoms results in an increase in electrical conductivity up to x=6. The lowest resistivity p 25 =3.110cm-1 and thermal lowest activation energy value E.=0.02leV were found for complexes with x = 6 and the ratio TCNQo ITCNQ 7 = 1.0. High conductivity values determined for these salts are related to the high polarizability of the polymeric cations.

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Section: Resultsmentioning

confidence: 99%

Electrical Conductivity of 7,7,8,8-Tetracyanoquinodimethane Salts with Polycations Containing Sulfur Atoms and Aromatic Rings in the Main Chain

Pęcherz

Κryszewski

1983

Polym J

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“…The one-step method was also used by Pecherz ef al. [24,251 to synthesize complex TCNQ salts of ionenes containing charged S + atoms in the main chain with a TCNQ'/TCNQ' ratio close to one. Synthesis of complex salts with controlled TCNQ'/TCNQ' ratio required, however, a two-step method: after preparing the simple salt, the calculated amount of neutral TCNQ was added and complex salts with TCNQ'/TCNQ' ratios varying from 0.1 to 1.0 were obtained.…”

Section: Tcnq Ct Complexes and Salts -With Ionenesmentioning

confidence: 99%

“…The conductivity values are higher for aliphatic polycations with an odd number of methylene groups between sulfur atoms. An odd number of CH2 groups influences the more favorable conformation of the polymethylene chain and more appropriate conditions for electron delocalization in the TCNQ column [24].…”

Section: Electrical Properties Of Complex Salts With Ionenesmentioning

confidence: 99%

Charge transfer complexes and salts of ionenes

Κryszewski¹,

Pęcherz²

1994

Polymers for Advanced Techs

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A review of the synthesis and properties of ionenes is presented. Particular attention is paid to the electrical and related properties of conductive teteracyano‐p‐quinodimethane (TCNQ) complex salts of ionenes containing ammonium or sulfonium groups in the main chain and to their chemical stability. The recent work on preparation of such ionenes with inorganic and organic counterions which show interesting linear and nonlinear optical properties is also discussed. It is shown that in the solid state ionenes act as a kind of a matrix fixing, in a chemically controlled way, positions and distribution of different kinds of counterions. Because the reaction of counterion exchange is easy in the case of ionenes it provides a convenient way to prepare a broad class of polyelectrolytes with many different properties.

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“…Complex salts of tetracyanoquinodimethane (TCNQ) with polycations were prepared according to ref. 16).…”

Section: Experimental Partmentioning

confidence: 99%

Role of polymer matrix on the conductivity of polymers doped with tetracyanoquinodimethane (TCNQ) salts of polycations

Pęcherz

Κryszewski

1989

Makromol. Chem.

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The influence of interactions with polymer matrix on the critical concentration and stability of heterogeneous conductive polymer films was investigated. These films were obtained by reticulate doping of polyacrylonitrile (PAN), poly(methy1 methacrylate) (PMMA) and polycarbonate (PC) with complex salts of tetracyanoquinodimethane (TCNQ) with polycations having sulfonium groups in the main chain, Ks[4,6]. It was found that the chemical structure of the matrix influences the conductivity of such systems. The PMMA matrix is most suitable for obtaining conducting systems at low concentration of the dopant. In PMMA the absorption spectra of moleculary dispersed Ks[4,6] do not change with time. The strong influence of PAN matrix was confirmed by the study of absorbance changes of Ks[4,6] with time in this matrix and particularly by investigation of absorption of this salt in solutions containing acrylonitrile/methyl methacrylate copolymers of various composition.

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Electrical properties of TCNQ complex salts with polycations containing sulfur atoms in the main chain

Cited by 13 publications

References 22 publications

Electrical Conductivity of 7,7,8,8-Tetracyanoquinodimethane Salts with Polycations Containing Sulfur Atoms and Aromatic Rings in the Main Chain

Electrical Conductivity of 7,7,8,8-Tetracyanoquinodimethane Salts with Polycations Containing Sulfur Atoms and Aromatic Rings in the Main Chain

Charge transfer complexes and salts of ionenes

Role of polymer matrix on the conductivity of polymers doped with tetracyanoquinodimethane (TCNQ) salts of polycations

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