Immobilization of 'beta' halogenated ironporphyrin in the silica matrix by the sol-gel process - Vidoto, Ednalva Aparecida; Moreira, Maria Silvia Monsalves; Vinhado, Fábio da Silva; Ciuffi, Kátia Jorge; Nascimento, Otaciro Rangel; Iamamoto, Yassuko (Journal of Non-Crystalline Solids, 2002)