On the physical properties of conducting poly(3,4-dimethoxypyrrole) films

Gassner, Fred; Graf, Stephanie; Merz, Andreas

doi:10.1016/s0379-6779(97)80100-2

Cited by 15 publications

(8 citation statements)

References 7 publications

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“…1, the interplanar spacings between the aromatic groups can be identified with the peaks corresponding to the dspacings of 3.4 and 3.6Å for the doped Ppy [3] and the undoped Ppy [32], respectively. For the undoped Ppy, the d-spacing at 4.5Å can be referred to the distance between neighboring pyrrole rings where the ␣-␣ linkages are single bond [33,34]. For the doped Ppy, the d-spacing at 4.1-4.2Å can be identified as the distance between neighboring pyrrole rings where the ␣-␣ linkages are double bond [3].…”

Section: Characterization Of Polypyrolementioning

confidence: 99%

“…The distance between two hard segments of the undoped Ppy and doped Ppy can be identified with the peaks corresponding to the d-spacings of 5.9 and 6.9-7.2Å [35], respectively; these two distinct peaks are due to different counterions. The counterion of the undoped Ppy is SO 4 The counterion of the doped Ppy is NSA [33]. The degree of crystallinity can be defined as the peak area at 21.…”

Section: Characterization Of Polypyrolementioning

confidence: 99%

See 1 more Smart Citation

Induced interaction between polypyrrole and SO2 via molecular sieve 13X

Soontornworajit

Wannatong

Hiamtup

et al. 2007

Materials Science and Engineering: B

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Section: Characterization Of Polypyrolementioning

confidence: 99%

Section: Characterization Of Polypyrolementioning

confidence: 99%

Induced interaction between polypyrrole and SO2 via molecular sieve 13X

Soontornworajit

Wannatong

Hiamtup

et al. 2007

Materials Science and Engineering: B

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“…For example, poly(3,4-dimethoxypyrrole) has higher conductivity and is easier to synthesize than its unsubstituted and alkyl-substituted counterparts. [14,15] In this light, bipyrroles represent interesting starting points for constructing conducting polymers; however, to the best of our knowledge, only symmetric bipyrroles [9,16] have been studied, likely due to a dearth of methods for preparing unsymmetrical bipyrroles. [17][18][19][20] Functional materials with multiple color states and a large palette of colors are required to meet the requirements for new electrochromic devices.…”

Section: Introductionmentioning

confidence: 99%

Conjugated 4‐Methoxybipyrrole Thiophene Azomethines: Synthesis, Opto‐Electronic Properties, and Crystallographic Characterization

Tshibaka

Bishop

Roche

et al. 2011

Chemistry A European J

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In the search of functional materials with improved electrochromic properties, thiophenes and asymmetric bipyrroles have been conjugated with azomethine units. 4-Methoxy-2,2'-bipyrroles 3-6 were first synthesized by a general route from 4-hydroxyproline and converted subsequently to dialdehydes 8-15, which underwent condensations with different aminothiophenes to provide azomethine conjugates 14-18 and 20-22. The crystallization and X-ray analysis of 20 showed the heterocycles and azomethine bonds were all co-planar with the heterocycles adopting an anti-parallel arrangement. These configurations result in extended conjugation and enhanced opto-electronic properties of the azomethines. Oxidation potential (E(pa)) was tailored by modification of the substitution pattern of the terminal thiophenes and central pyrroles of the azomethines. The combined low E(pa) and extended azomethine degree of conjugation resulted in stark color transitions occurring between their neutral and oxidized states. Reversible color formation was induced both electrochemically and by doping/de-doping with trifluoroacetic acid/triethylamine.

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“…Contingent on the structure of the pyrrole monomer,12, 13 conductivity and ease of synthesis may be altered. For example, poly(3,4‐dimethoxypyrrole) has higher conductivity and is easier to synthesize than its unsubstituted and alkyl‐substituted counterparts 14. 15 In this light, bipyrroles represent interesting starting points for constructing conducting polymers; however, to the best of our knowledge, only symmetric bipyrroles9, 16 have been studied, likely due to a dearth of methods for preparing unsymmetrical bipyrroles 17–20…”

Section: Introductionmentioning

confidence: 99%

Solitons as dissipative structures

Velarde

2004

Int J of Quantum Chemistry

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I review here recent results regarding the excitation of nonlinear interfacial oscillations, and hence waves, at the surface of a liquid or at the interface separating two liquids when a thermal gradient is imposed or there is adsorption, and subsequent absorption in the bulk, of a (light) surfactant, hence creating tangential stresses due to the surface tension gradient (Marangoni effect). I also recall their solitonic features upon collisions and boundary reflections, etc., even though the proposed evolution equations are not hyperbolic but a parabolic-hyperbolic combination like a dissipation-modified Boussinesq-Korteweg-de Vries equation. Theory, numerics, and experiments support my claim that solitons can exist and survive in a dissipative medium provided, for example, past an instability threshold, there is an appropriate input-output energy balance. This is very much like (steady) dissipative structures and, indeed, (nonlinear) waves traveling with constant velocity in the moving frame are steady dissipative structures.

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On the physical properties of conducting poly(3,4-dimethoxypyrrole) films

Cited by 15 publications

References 7 publications

Induced interaction between polypyrrole and SO2 via molecular sieve 13X

Induced interaction between polypyrrole and SO2 via molecular sieve 13X

Conjugated 4‐Methoxybipyrrole Thiophene Azomethines: Synthesis, Opto‐Electronic Properties, and Crystallographic Characterization

Solitons as dissipative structures

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