title: Monitoring of amino functionalities on plasma-chemically modified polypropylene supports with a chromogenic and fluorogenic pyrylium reporter.
abstract: A straightforward strategy toward the sensitive fluorometric detection of primary amino groups on plasma-chemically modified polypropylene supports is presented, exploiting the transformation of the sterically nonhindered pyrylium dye Py-1 into its pyridinium counterpart. The reaction-induced blue-shifted absorption and emission bands and an increased fluorescence quantum yield provide the basis for the spectroscopic distinction between covalently bound and free, that is, nonspecifically adsorbed label molecules. With this label, for the first time, plasma-chemically introduced amino functionalities could be monitored on the surface of a polymer film employing fluorescence spectroscopy and confocal laser scanning microscopy.
authors.affiliation: Federal Institute for Materials Research and Testing, Richard-Willstaetter-Str. 11, D-12489 Berlin, Germany.
authors.forename: Katrin
authors.initials: K
authors.lastname: Hoffmann
authors.forename: Renate
authors.initials: R
authors.lastname: Mix
authors.forename: Ute
authors.initials: U
authors.lastname: Resch-Genger
authors.forename: Joerg F
authors.initials: JF
authors.lastname: Friedrich
mesh_terms: D006575:Heterocyclic Compounds, 3-Ring / Q000737:chemistry*; D018613:Microscopy, Confocal; D011126:Polypropylenes / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D013499:Surface Properties
chemical_list: D006575:Heterocyclic Compounds, 3-Ring; D011126:Polypropylenes; C505939:pyrylium 1