title: Photophysical study of naphthalenophanes: evidence of adduct formation with molecular oxygen.
abstract: The photophysical properties of two atropisomeric naphthalenophanes (1 and 2) have been studied. Their structure only differs in the relative arrangement, syn (1) or anti (2), of the two aromatic units. The compounds emission is mainly excimeric and is strongly quenched in the presence of oxygen. Comparison of emission intensities obtained from steady state and from decay times provides clear evidence of the formation of ground state charge transfer complexes between oxygen and the naphthalenophanes 1 and 2. The calculated values for the association constants are on the order of 10(3) M(-1) (ethanol, room temperature) for both naphthalenophanes.
authors.affiliation: Departament de Química Inorgànica, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain. laura.rodriguez@qi.ub.es
authors.forename: Laura
authors.initials: L
authors.lastname: Rodríguez
authors.forename: João C
authors.initials: JC
authors.lastname: Lima
authors.forename: Fernando
authors.initials: F
authors.lastname: Pina
authors.forename: Roberta
authors.initials: R
authors.lastname: Cacciapaglia
authors.forename: Stefano
authors.initials: S
authors.lastname: Di Stefano
authors.forename: Albert
authors.initials: A
authors.lastname: Ruggi
mesh_terms: D008163:Luminescent Measurements; D008958:Models, Molecular; D008968:Molecular Conformation; D009281:Naphthalenes / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry*; D013237:Stereoisomerism
chemical_list: D009281:Naphthalenes; D010100:Oxygen