Title
Synthesis of novel profluorescent nitroxides as dual luminescent-paramagnetic active probes
Author
Anca G. Coman, Codruta C. Paraschivescu, Anca Paun, Andreea Diac, Niculina D. Hădade, Laurent Jouffret, Arnaud Gautier, Mihaela Matache, Petre Ionita
Year
2017
Journal
New Journal of Chemistry
Abstract
We describe herein the synthesis of new profluorescent nitroxides based on 2,5-disubstituted-1,3,4-oxadiazoles as fluorescent moieties and the 2,2,6,6-tetramethylpiperidine-N-oxyl radical (TEMPO) as paramagnetic probes. The synthesis and optical and electronic properties of the oxadiazole-based precursors of the profluorescent nitroxides, as well as the nitroxides and their reduced forms are also described. Physical investigations (i.e. absorption and emission spectroscopy, cyclic voltammetry) indicate a different luminescence behaviour function to the oxadiazole substituent. A linear response to reducing agents, i.e. sodium ascorbate, monitored by fluorescence spectroscopy, suggests the possibility of using the synthesized compounds as potent active probes in detection of various analytes of interest.
Instrument
FP-8300
Keywords
Fluorescence, Solid state, Optical properties, Materials