title: Optical Properties of Some Fluorinated Poly(1,3,4-Oxadiazole-Ether)s in Homogeneous and Heterogeneous Media. Changes Induced by SnO2, NiO and SnO2/NiO Mixed-Oxide Nanoparticles.
abstract: Optical characteristics of some fluorinated poly(1,3,4-oxadiazole-ether)s in presence of SnO2, NiO and SnO2/NiO mixed-oxide nanoparticles (NPs) was investigated. The interactions between polymers and metal oxide NPs were studied by steady-state UV-Vis absorption and fluorescence spectroscopy techniques. The absorption and fluorescence signals of all investigated polymers was modified by presence of both pure and mixed-oxide nanoparticles. The moderate values of Stern-Volmer quenching constant and non-linear trend of Scott plot indicate the less affinity between metal oxide NPs and polymers. The solvation behavior of some fluorinated poly(1,3,4-oxadiazole-ether)s in chloroform-N,N-dimethylformamide and N,N-dimethylformamide-dimethylsulfoxide mixtures was discussed.
authors.affiliation: "Petru Poni" Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487, Iasi, Romania. michalupu@yahoo.co.uk.
authors.forename: Mihaela
authors.initials: M
authors.lastname: Homocianu
authors.affiliation: "Petru Poni" Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487, Iasi, Romania.
authors.forename: Anton
authors.initials: A
authors.lastname: Airinei
authors.affiliation: "Petru Poni" Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487, Iasi, Romania.
authors.forename: Alina Mirela
authors.initials: AM
authors.lastname: Ipate
authors.affiliation: "Petru Poni" Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487, Iasi, Romania.
authors.forename: Petronela Pascariu
authors.initials: PP
authors.lastname: Dorneanu
authors.affiliation: "Petru Poni" Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487, Iasi, Romania.
authors.forename: Corneliu
authors.initials: C
authors.lastname: Hamciuc
keywords: Absorption and fluorescence spectra; Fluorinated poly(1,3,4-oxadiazole-ether)s; Heterogeneous media; SnO2, NiO and SnO2/NiO nanoparticles