Coordination environments in photochromic hybrid xerogels analyzed by solid-state nuclear magnetic resonance - Oliveira Junior, Marcos de; Schneider, José Fabian; Rodrigues Filho, Ubirajara Pereira; Souza, Adriano Lopes de; Brandão, Renata; Carvalho, Flávio Luiz Silva de (Encontro Nacional de Física da Matéria Condensada - ENFMC, 2009)