Synthesis and Characterization of Some Highly Conjugated Semiconducting Polymers

Engelhardt, E. H.; Pohl, Herbert A.

doi:10.1021/j100817a004

Cited by 116 publications

(28 citation statements)

References 4 publications

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“…PAQRs were synthesized following the method of Phol and Engelhardt [11]. Various kinds of acene monomers, such as anthracene, naphthalene and pyrene, were used to synthesize a series of PAQRs.…”

Section: Experimental Materialsmentioning

confidence: 99%

Electrorheological properties of poly(acene quinone) radical suspensions

Choi

Cho

1997

Polym. Adv. Technol.

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Section: Experimental Materialsmentioning

confidence: 99%

Electrorheological properties of poly(acene quinone) radical suspensions

Choi

Cho

1997

Polym. Adv. Technol.

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“…In all cases the resulting polymers were black, insoluble solids which were purified by exhaustive extraction (3).…”

Section: Methodsmentioning

confidence: 99%

The charge storage and other electrical properties of a series of polyacene quinone radical polymers

O’Brien¹,

Lushington²

1976

Can. J. Chem.

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A series of polyacene quinone radical polymers were made. The chemical analysis showed that the severe reaction conditions favored the Scholl (elimination of H z and H20) over the Friedel-Crafts reaction. Electron paramagnetic resonance spectra confirmed the presence of a biradical. Conductivity measurements in the ohmic and space charge limited regions showed that large T systems existed and that carrier traps were shallow. The T system structure and absence of quinone structure was confirmed by ir spectrometry which also showed the optical absorption edge to be 0.8 eV. Charge was injected into the polymers forming electrets and thermally stimulated current emission spectra confirmed a shallow trap depth (-0.4 eV). It is postulated that thermal excitation to a triplet state produces the biradical and conduction is by hopping between adjacent T systems and charge storage is associated with the extensive T systems. R. N. O'BRIEN et K. J . LUSHINGTON. Can. J. Chem. 54, 1841Chem. 54, (1976. On a prepare une skrie de polymkres radicalaires de polyackne quinone. L'analyse chimique montre que les conditions experimentales tres drastiques utilisies favorisent la reaction de Scholl (avec I'ilimination de H2 et H20) par opposition h la reaction de Friedel-Crafts. Les spectres de rpe confirment la presence d'un biradical. Des mesures de conductivite dans la region ohmique et la region limitee d'espace charge montrent que de grands systkmes T existent et que les pikges des vecteurs sont peu profonds. On a confirme par spectroscopie infrarouge la structure du systeme T et l'absence d'une structure quinone; la spectroscopie infrarouge montre aussi que I'absorption optique est de 0.8 eV. On a inject6 des charges dans les polymkres de f a~o n B former des electrets et des spectres de courant d'kmission stimulks thermiquement confirment la presence de pieges faibles (-0.4 eV). O n postule que l'excitation thermique vers un itat triplet produit le biradical et que la conduction se produit par un saut entre des systkmes T adjacents et que l'emmagasinage de charge est associe avec les grands systkmes T .[Traduit par le journal]

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“…[30] Naphthalene (Junei Chemical Co., Japan) and phthalic anhydride (Duksan Pure Chemical Co, Korea) were used as monomers, and zinc chloride (ZnCl; Duksan Pure Chemical Co, Korea) was used as a catalyst in a Friedel-Crafts acylation process with naphthalene and phthalic anhydride. The polymerizations were placed in an inert gas environment, as described by Choi et al [29] The reaction temperature was kept at 250 8C.…”

Section: Materials Synthesis and Characterizationmentioning

confidence: 99%