title: 2-Acetylindan-1,3-dione and its Cu(2+) and Zn(2+) complexes as promising sunscreen agents.
abstract: In continuation of a previous spectroscopic and quantum chemical study on 2-acetylindan-1,3-dione (2AID), the spectral properties and photostability of 2AID and its Cu(2+) and Zn(2+) complexes in different solvents are reported. Comparison is made with the photostability of two commercially available sunscreens: benzophenone-3 and octylmethoxycinnamate. 2AID exhibits a higher photostability, high molar absorption coefficient (42 000 m(-1) cm(-1)) at lambda(max) and broad-spectrum UV-protection properties. The hypothesis that the strong intramolecular H-bonding is responsible for the higher photostability was confirmed by studying the photodegradation upon irradiation with UV light of 2AID in hydrogen bond-breaking solvent, DMSO. The data obtained show that 2AID undergoes rapid degradation in this solvent. It is found that Cu(2+) and Zn(2+)-2AID complexes show higher photostability in DMSO than 2AID itself.
authors.affiliation: Department of Chemistry, University of Sofia, 1126 Sofia, Bulgaria.
authors.forename: A
authors.initials: A
authors.lastname: Ahmedova
authors.forename: V
authors.initials: V
authors.lastname: Mantareva
authors.forename: V
authors.initials: V
authors.lastname: Enchev
authors.forename: M
authors.initials: M
authors.lastname: Mitewa