Luminescent optical detection of volatile electron deficient compounds by conjugated polymer nanofibers
American Chemical Society
Optical 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.
Conjugated polymers , Fluorescence , Luminescence , Nanofibers , Electron-deficient , Quenching , Volatile organic compounds
WADE, A., LOVERA, P., O’CARROLL, D., DOYLE, H. & REDMOND, G. 2015. Luminescent optical detection of volatile electron deficient compounds by conjugated polymer nanofibers. Analytical Chemistry, 87, 4421-4428. doi: 10.1021/acs.analchem.5b00309
© 2015 American Chemical Society. This document is the Accepted Manuscript version of a Published Work that appeared in final form in Analytical Chemistry (copyright © American Chemical Society) after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1021/acs.analchem.5b00309