Studies of the intermolecular interactions in polypyrrole and conjugated composites based on polypyrrole

We report the effects of different intermolecular interactions on the properties of soluble dodecylbenzenesulphonate (DBS)-doped polypyrrole (PPY) and composites. The contribution of the intermolecular interactions to the optical properties of PPY and composites has been investigated by UV-vis transmission spectroscopy. Polymer–solvent interactions result in different chain conformations that are responsible for the changes in the absorption spectra of PPY(DBS). Some relevant differences between the filtered soluble fraction and the initial as-synthesised PPY(DBS) are demonstrated by the IR absorption spectra. In order to study how the molecular interaction between the components affects the properties of the composite, we mix different types of polymers: (i) doped polypyrrole and an undoped highly fluorescent polymer (methyl-substituted ladder-type polyparaphenylene, m-LPPP); (ii) doped polypyrrole and an electronically inert polymer (polymethylmethacrylate, PMMA). The changes induced by high pressures on the absorption spectra of PPY(DBS) and m-LPPP/PMMA/PPY(DBS) are discussed in terms of chain conformation changes and dipolar–dipolar interactions. The fast magic angle spinning (MAS) spectra of PPY(DBS) provide a structural and dynamical investigation on conjugated polymers based on 1H NMR spectroscopy. Copyright © 1999 John Wiley & Sons, Ltd.

[1]  D. Demco,et al.  Solid-state nuclear magnetic resonance spectra of dipolar-coupled multi-spin systems under fast magic angle spinning , 1999 .

[2]  H. Spiess,et al.  Advanced solid-state NMR spectroscopy of strongly dipolar coupled spins under fast magic angle spinning , 1998 .

[3]  Y. Kim,et al.  Synthesis and Characterization of Soluble Polypyrrole , 1997 .

[4]  Ullrich Scherf,et al.  Origin and stabilization of photoexcitations in conjugated polymers , 1997 .

[5]  D. Rueda,et al.  Preparation of conductive polypyrrole-polystyrene sulfonate by chemical polymerization , 1996 .

[6]  Ullrich Scherf,et al.  Highly efficient electroluminescence of new wide band gap ladder‐type poly(para‐phenylenes) , 1996 .

[7]  D. Y. Kim,et al.  Synthesis of soluble polypyrrole of the doped state in organic solvents , 1995 .

[8]  R. Davidson,et al.  An IR spectroscopic study of the electrochemical reduction of polypyrrole doped with dodecylsulfate anion , 1995 .

[9]  J. M. Tura,et al.  Comparison of polypyrrole, poly(3,4-dimethylpyrrole) and poly(3-methoxy-4-methylpyrrole) , 1995 .

[10]  Arthur J. Epstein,et al.  Electromagnetic radiation shielding by intrinsically conducting polymers , 1994 .

[11]  J. Stampfl,et al.  Quantum efficiencies of electroluminescent poly(p-phenylenes) , 1994 .

[12]  Hess,et al.  Photoexcitations in polythiophene at high pressure. , 1993, Physical review. B, Condensed matter.

[13]  K. Müllen,et al.  Polyarylenes and poly(arylenevinylene)s: 8. The first soluble ladder polymer with 1,4-benzoquinone-bismethide subunits , 1992 .

[14]  Weaver,et al.  Direct measurements of bipolaron-band development in doped polypyrrole with inverse photoemission. , 1991, Physical review. B, Condensed matter.

[15]  R. Chance,et al.  Study of the pressure effect on polydiacetylene in good solvent , 1991 .

[16]  G. Zerbi,et al.  Vibrational Spectroscopy of Polyconjugated Aromatic Materials with Electrical and Non Linear Optical Properties , 1991 .

[17]  J. Moulu.  Behaviour of oil ganglia displaced by a surfactant solution in a porous medium , 1985 .

[18]  J. Brédas.  Aromatic polymers: evolution of their electronic properties as a function of bond-length alternation and torsion angle along the chains , 1985 .

[19]  G. Street,et al.  Optical study of polypyrrole perchlorate , 1983 .