E.p.r. studies on poly(paraphenylene)s synthesized by two different routes

The effect of conformational dependent properties of radical cations on poly( N,N ‐dimethylaniline)

“…Conjugated polymers such as poly(p-phenylene), [1][2][3][4] polyacetylene, [5] poly(p-phenylene sulfide), [6] and polyaniline [7] usually contain radical species and exhibit singlet ESR signals without hyperfine structure, suggesting that unpaired electrons are highly delocalized along the main chains of the polymers. Conjugated polymers with spins located in side chains show more complicated ESR signals, they can either be broad spectra with hyperfine splitting [8] or still broad singlet curves.…”

Endor studies on conjugated polymers

“…Recently a large number of papers have been published which analyse the results of electron spin resonance [l], electron spin echo [2], and dynamic nuclear polarization [3] of polyacetylene. EPR results of other conjugated polymers are known for instance from poly(p-phenylene) [4] and poly(phenylacety1ene) [5].…”

Construção de um Susceptômetro AC Autobalanceado e Estudo de Polímeros Condutores Eletrônicos por Susceptibilidade Magnética e Ressonância Magnética.

“…No processo de polimerização descrito por Kovacic et al [73] são observados radicais que poderiam estar associados com defeitos estruturais, devido à imperfeições no processo de polimerização, também chamados macrociclos. Estes macrociclos possuem um elétron desemparelhado que se estende sobre alguns átomos de carbono, sendo observado nos espectros de RPE [75,76] .…”