Ring flips as a probe of the structure of polyanilines

Kaplan, S.; Conwell, E. M.; Richter, A.F.; MacDiarmid, Alan G.

doi:10.1021/ma00194a029

Cited by 46 publications

(25 citation statements)

References 9 publications

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“…We propose that the slow relaxation of photoexcited ring-rotational defects is due to constraint of the rings (from rotating), caused by the lack of free volume as suggested by an NMR study [13]. Hence intrachain and interchain steric interactions may make ring-torsional defects metastable.…”

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confidence: 83%

Photoexcitations in pernigraniline: Ring-torsional polarons and bond-order solitons

et al. 1992

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We report the near-steady-state and long-time photoinduced spectroscopies of pernigraniline base, a novel Peierls ground-state polymer with multiple order parameters. Two kinds of defects are distinguished by differing time domains, ir-active vibrations, and light-induced electron spin resonance (LESR). The short-lived defect has a lifetime of msec scale, defect mass of ~~5m e , and is spinless; in contrast, the long-lived defect (mass -30Qm e ) has a lifetime of greater than several hours at low temperatures and spin j. We propose the short-lived excitation is a soliton defect in the bond-length order parameter, while the long-lived excitation is a polaronlike defect in the ring-torsion-angle order parameter.

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confidence: 83%

Photoexcitations in pernigraniline: Ring-torsional polarons and bond-order solitons

et al. 1992

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“…The chemical composition and possible electropolymerization of a poly(new fuchsin) film is analogous to that of polyaniline and its analogues [22,[27][28][29][30][31]. Fig.…”

Section: The Electrochemical Properties Of Poly(fuchsin Acid)/ Nafionmentioning

confidence: 99%

Electropolymerization of polymerized fuchsin acid films enhanced by Nafion® and their electrocatalytic properties with melatonin and 3,4-dihydroxyphenylalanine

Chen

Chuang

2005

Journal of Electroanalytical Chemistry

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“…Polyaniline has been the subject of considerable scientific inquiry because of its unique electrical behavior, its potential as an environmentally stable conducting polymer1 and wide applications in different fields, such as microelectronics,2, 3 sensors,4, 5 electrodes,6, 7 corrosion protection,8, 9 and release devices 10, 11. Polyaniline is inherently brittle and poor in processability due to its insolubility in common organic solvents.…”

Section: Introductionmentioning

confidence: 99%

Chemical modification of polyaniline by N‐grafting of polystyrene synthesized via ATRP

Gheybi

Abbasian

Moghaddam

et al. 2007

J of Applied Polymer Sci

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The N-substituted polyaniline (PANi) was synthesized by incorporation of bromine-terminated polystyrene (PS-Br) onto the emeraldine form of polyaniline. End brominated polystyrene was synthesized by atom transfer radical polymerization (ATRP) technique and then deprotonated polyaniline was reacted with PS-Br to prepare PS-grafted PANi (PS-g-PANi) copolymer through Ngrafting reaction. The degree of N-grafting can be controlled by adjusting the molar feed ratio of PS-Br to the number of repeat units of PANi. The microstructure and compositions of the PS-g-PANi copolymers with different degrees of N-substitution were characterized by FT-IR, elemental analysis, differential scanning calorimetry (DSC), and scanning electron microscopy (SEM). The cyclicvoltammetry shows that the electroactivity of N-substituted PANi is strongly dependent on the degree of N-grafting. The solubility of PS-g-PANi copolymers in common organic solvents such as tetrahydrofuran and chloroform was improved by increasing the degree of N-grafting, and also the samples are partially soluble in xylene.

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Ring flips as a probe of the structure of polyanilines

Cited by 46 publications

References 9 publications

Photoexcitations in pernigraniline: Ring-torsional polarons and bond-order solitons

Photoexcitations in pernigraniline: Ring-torsional polarons and bond-order solitons

Electropolymerization of polymerized fuchsin acid films enhanced by Nafion® and their electrocatalytic properties with melatonin and 3,4-dihydroxyphenylalanine

Chemical modification of polyaniline by N‐grafting of polystyrene synthesized via ATRP

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