Quantification of singlet oxygen generated by thermolysis of 3,3'- (1,4-naphthylidene) dipropionate. Monomol and dimol photoemission and effects of 1,4-diazabicyclo (2.2.2) octane - Di Mascio, Paolo; Medeiros, Marisa Helena Gennari de; Sies, H (Reunião Anual da Sociedade Brasileira de Química, 1990)