Effect of doping systems, heat, and time on the electrical conductivity of poly-p-phenylenes

Simitzis, J; Stamboulis, A; Hinrichsen, G

dc.contributor.author	Simitzis, J	en
dc.contributor.author	Stamboulis, A	en
dc.contributor.author	Hinrichsen, G	en
dc.date.accessioned	2014-03-01T01:11:55Z
dc.date.available	2014-03-01T01:11:55Z
dc.date.issued	1996	en
dc.identifier.issn	0169-6424	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/11862
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0029716888&partnerID=40&md5=10e2135a5e7a6062194a69913f95fd88	en
dc.subject	Characterization	en
dc.subject	Doping systems	en
dc.subject	Electrically conducting polymers	en
dc.subject	Electron donor-acceptor (EDA) interactions	en
dc.subject	Poly-p-phenylenes	en
dc.subject.classification	Polymer Science	en
dc.subject.other	Annealing	en
dc.subject.other	Catalysts	en
dc.subject.other	Characterization	en
dc.subject.other	Electric conductivity	en
dc.subject.other	Electric conductivity measurement	en
dc.subject.other	Fourier transform infrared spectroscopy	en
dc.subject.other	Semiconductor doping	en
dc.subject.other	Solvents	en
dc.subject.other	Stability	en
dc.subject.other	Synthesis (chemical)	en
dc.subject.other	Thermal effects	en
dc.subject.other	X ray diffraction	en
dc.subject.other	Doping systems	en
dc.subject.other	Electron donor acceptor interaction	en
dc.subject.other	Kovacic procedure	en
dc.subject.other	Polymer dopant complex	en
dc.subject.other	Polyphenylenes	en
dc.subject.other	Thermal deactivation	en
dc.subject.other	Semiconducting polymers	en
dc.title	Effect of doping systems, heat, and time on the electrical conductivity of poly-p-phenylenes	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	1996	en
heal.abstract	Poly-p-phenylenes (PPPs) were synthesized by the Kovacic procedure using CuCl2 as the oxidant and AlCl3 as the catalyst. The alternating electrical conductivity of PPPs was investigated considering the doping system (dopant-solvent), heat treatment, and time. Doped poly-p-phenylenes remained semiconductors even 1 year after doping with a lower conductivity compared to the initial one. The most effective doping systems for PPPs were FeCl3-ACN (ACN: acetonitrile) and FeCl3-N (N: nitrobenzene), while SnCl4-ACN yielded material with a lower but comparable conductivity. FTIR spectra and X-ray diffractograms of doped materials having a lower conductivity (i.e. PPP doped with SnCl4-ACN) approached that of the undoped PPP. The conductivity depends on the stability of the polymer-dopant complex, which is affected by the electron donor-acceptor (EDA) interactions between the dopant and the solvent. Annealing after doping resulted in a decrease in conductivity, due to the thermal deactivation of the polymer-dopant complex. The ratio of sigma'(tau)/sigma'(0) (where sigma'(tau) and sigma'(0) are the real part of the electrical conductivity at log f = 7 and log f = 1, respectively) ranges from 10(1) for the doped polymers at a time of t = 0 to 10(1)-10(2) at t = 12 months, and to 10(4) for the heat-treated doped polymers. The conductivity measurements suggested an indirect method to characterize the stability of the complexes formed.	en
heal.publisher	VSP BV	en
heal.journalName	New Polymeric Materials	en
dc.identifier.isi	ISI:A1996VC12100009	en
dc.identifier.volume	5	en
dc.identifier.issue	1	en
dc.identifier.spage	81	en
dc.identifier.epage	91	en