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Luminescent Optical Detection of Volatile Electron Deficient Compounds by Conjugated Polymer Nanofibers
journal contribution
posted on 2015-04-21, 00:00 authored by Aidan Wade, Pierre Lovera, Deirdre O’Carroll, Hugh Doyle, Gareth RedmondOptical
detection of volatile electron deficient analytes via fluorescence
quenching is demonstrated using ca. 200 nm diameter template-synthesized
polyfluorene nanofibers as nanoscale detection elements. Observed
trends in analyte quenching effectiveness suggest that, in addition
to energetic factors, analyte vapor pressure and polymer/analyte solubility
play an important role in the emission quenching process. Individual
nanofibers successfully act as luminescent reporters of volatile nitroaromatics
at sub-parts per million levels. Geometric factors, relating to the
nanocylindrical geometry of the fibers and to low nanofiber substrate
coverage, providing a less crowded environment around fibers, appear
to play a role in providing access by electron deficient quencher
molecules to the excited states within the fibers, thereby facilitating
the pronounced fluorescence quenching response.
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Observed trendsfluorescence quenchinganalyte vapor pressureConjugated Polymer NanofibersOptical detectionIndividual nanofibersanalyte quenching effectivenessrolefluorescence quenching responseVolatile Electron Deficient Compoundsnanofiber substrate coverageelectronquencher moleculesnanoscale detection elementsnanocylindrical geometryLuminescent Optical Detectionemission quenching processGeometric factors
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