“…34,57 When present, molecular oxygen can work as a mild oxidant to regenerate the nitroxides from the N-alkoxyamine or N-hydroxylamine. 6,54,60 Under anaerobic conditions, decomposition of the NO-C bond results in radical-radical recombination into the diamagnetic species (N-hydroxylamine / N-alkoxyamine).…”
<p>This thesis proposes a boron-dipyrromethene (BODIPY) fluorophore-based radical sensing system covalently linked to 2,2,6,6-tetramethylpiperidine-N-oxyl (TEMPO), a paramagnetic nitroxide, known to quench fluorescence non-radiatively through electron exchange. Introduction of a free radical creates a diamagnetic product, resulting in the restoration of fluorescence due to the inhibition of its quenching pathway. This has been successfully applied to the activation of a pre-fluorescent system with the addition of metal enhanced fluorescence via silver nanoparticles. Further research looks at extending the π conjugation of the BODIPY based pre-fluorescent probe to bathochromically shift its spectroscopic properties to enhance its potential in biological monitoring applications.</p>
“…34,57 When present, molecular oxygen can work as a mild oxidant to regenerate the nitroxides from the N-alkoxyamine or N-hydroxylamine. 6,54,60 Under anaerobic conditions, decomposition of the NO-C bond results in radical-radical recombination into the diamagnetic species (N-hydroxylamine / N-alkoxyamine).…”
<p>This thesis proposes a boron-dipyrromethene (BODIPY) fluorophore-based radical sensing system covalently linked to 2,2,6,6-tetramethylpiperidine-N-oxyl (TEMPO), a paramagnetic nitroxide, known to quench fluorescence non-radiatively through electron exchange. Introduction of a free radical creates a diamagnetic product, resulting in the restoration of fluorescence due to the inhibition of its quenching pathway. This has been successfully applied to the activation of a pre-fluorescent system with the addition of metal enhanced fluorescence via silver nanoparticles. Further research looks at extending the π conjugation of the BODIPY based pre-fluorescent probe to bathochromically shift its spectroscopic properties to enhance its potential in biological monitoring applications.</p>
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