Conformational dynamics of phenylene rings in Poly(p-phenylene vinylene) (PPV) as revealed by 'ANTPOT. 13C' magic-angle-spinning exchange NMR experiments - Azevêdo, Eduardo Ribeiro de; Franco, Roberto W. A.; Marletta, Alexandre; Faria, Roberto Mendonça; Bonagamba, Tito José (Encontro Nacional de Física da Matéria Condensada, 2003)