title: Redox reactions and fluorescence spectroscopic behaviour of trifluoperazine at the surface of colloidal silica.
abstract: Fluorescence spectroscopic behaviour and redox reactions of trifluoperazine (TFP) were studied in aqueous solutions in the presence of silica (SiO2) particles. The effect of surface heterogeneity on the secondary reactions of the transients was determined using optical absorption and fluorescence techniques. It appears that electrostatic interaction is the driving force for adsorption of TFP over SiO2 particle. Contrary to the change in fluorescence intensity with time observed in an aqueous solution, fluorescence intensity of TFP did not change significantly with time over the surface of SiO2. Fluorescence microscopic observations of spleen cells treated with TFP over SiO2 showed that the drug got distributed in cells similar to that observed in homogeneous aqueous solution.
authors.affiliation: Chemistry and Isotope Group, Radiation Chemistry and Chemical Dynamics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India.
authors.forename: M
authors.initials: M
authors.lastname: Rele
authors.forename: S
authors.initials: S
authors.lastname: Kapoor
authors.forename: V
authors.initials: V
authors.lastname: Salvi
authors.forename: C K K
authors.initials: CK
authors.lastname: Nair
authors.forename: T
authors.initials: T
authors.lastname: Mukherjee
mesh_terms: D000818:Animals; D003102:Colloids; D051379:Mice; D015394:Molecular Structure; D010084:Oxidation-Reduction; D011675:Pulse Radiolysis; D012822:Silicon Dioxide / Q000737:chemistry*; D012965:Sodium Chloride / Q000737:chemistry; D013050:Spectrometry, Fluorescence / Q000379:methods; D013154:Spleen / Q000166:cytology; D055672:Static Electricity; D014268:Trifluoperazine / Q000737:chemistry* / Q000378:metabolism
chemical_list: D003102:Colloids; D014268:Trifluoperazine; D012965:Sodium Chloride; D012822:Silicon Dioxide