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Doctoral Thesis
DOI
https://doi.org/10.11606/T.46.2018.tde-27082018-103220
Document
Author
Full name
Rosamaria Wu Chia Li
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2002
Supervisor
Committee
Olivato, Paulo Roberto (President)
Frollini, Elisabete
Kawano, Yoshio
Rezende, Daisy de Brito
Roman, Lucimara Stolz
Title in Portuguese
Novos poli(p-xilileno)s e poli(p-fenileno vinileno)s obtidos via quinodimetanos gerados catodicamente
Keywords in Portuguese
Poli p-fenilenovinileno
Poli p-terfenilenovinileno
Polímeros (Química orgânica)
Polímeros condutores
PPV
PPX
Química orgânica
Síntese eletroquímica
Abstract in Portuguese
Esta tese envolveu a síntese de 11 precursores poliméricos inéditos, derivados de bifenilos e terfenilos, substituídos por grupos receptores e doadores de elétrons, por meio de reações de acoplamento de Suzuki. Tais precursores foram convertidos aos respectivos polímeros, poli(p-xilileno)s e poli(p-fenileno vinileno)s, via redução catódica, conduzindo a um total de 11 polímeros, sendo dez deles inéditos. Os polímeros obtidos foram caracterizados por métodos espectroscópicos (UV-VIS, IV, RMN), análises térmicas, SEC e medidas de condutividade elétrica pós-dopagem. Um dos polímeros foi empregado na construção de dispositivos metal/polímero/metal ("sanduíche"), que permitiram a determinação da mobilidade dos portadores de carga, bem como da altura de barreira para injeção de elétrons na junção metal/polímero.
Title in English
Novel poly(p-xylylene) s and poly (p-phenylene vinylene) are obtained via cathodically generated quinodimethanes
Keywords in English
Conductive polymers
Electrochemical synthesis
Organic chemistry
Poly p-phenylenevinylene
Poly p-terphenylene vinylene
Polymers (Organic chemistry)
PPV
PPX
Abstract in English
The synthesis via Suzuki coupling reaction of 11 new biphenylenic and terphenylenic polymer precursors, substituted by long-chain electron donating or withdrawing groups, is described. The electrochemical reduction of these precursors led to the corresponding poly(p-xylylene)s and poly(p-phenylene vinylene)s. Ten out of the 11 generated polymers have been never described before. AII the polymers were fully characterised by spectroscopic (UV-VIS, IR, NMR) and thermal analyses, as well as by SEC and electrical conductivity measurements of iodine-doped specimens. The positive charge carrier mobility and the barrier height for electron injection (metal/polymer) could be determined through I x V investigations of sandwich devices (metal/polymer/metal) for one of the polymers.
 
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Publishing Date
2018-08-27
 
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