Dokument-ID Dokumenttyp Autoren/innen Persönliche Herausgeber/innen Haupttitel Abstract Auflage Verlagsort Verlag Herausgeber (Institution) Erscheinungsjahr Titel des übergeordneten Werkes Jahrgang/Band ISBN Veranstaltung Veranstaltungsort Beginndatum der Veranstaltung Enddatum der Veranstaltung Ausgabe/Heft Erste Seite Letzte Seite URN DOI Lizenz Datum der Freischaltung OPUS4-38798 Buchkapitel Gawlitza, Kornelia; Wan, Wei; Wagner, Sabine; Rurack, Knut Tiwari, Ashutosh; Uzun, Lokman Fluorescent Molecularly Imprinted Polymers An ideal sensor system is a combination of a selective receptor, an effective transducer, and a sensitive detector. To utilize molecularly imprinted polymers (MIPs) as responsive recognition phases in sensors, the employment of fluorescent molecules or nanoparticles (NPs) that show prominent changes in their spectroscopic properties after binding of the target molecule in the MIP's cavity is particularly attractive. Such fluorescent MIPs (fMIPs) act through target-induced quenching, enhancement, or spectral shifts of the fluorescence. This contribution introduces different strategies of incorporation of fluorescent dyes, probes, and NPs into fMIPs. In addition, various sensing mechanisms are reviewed, and depending on the application of the sensor, the different deployable formats, their advantages, drawbacks, and impact will be presented and discussed. 1 Beverly, MA Scrivener Publishing, WILEY 2017 Advanced Molecularly Imprinting Materials 978-1-119-33629-7 89 128 2016-12-22 OPUS4-43352 Beitrag zu einem Tagungsband Gawlitza, Kornelia; Tiebe, Carlo; Banach, Ulrich; Noske, Reinhard; Bartholmai, Matthias; Rurack, Knut Novel sensor for long-term monitoring of ammonia in gas phase Because ammonia and its reaction products can cause considerable damage to human health and ecosystems, there is a need for reliably operating and reversibly interacting sensor materials to monitor traces of gaseous ammonia in ambient air, which at best can be used on-site for in-the-field measurements. Herein, the development of a sensor material for gaseous ammonia in the lower ppm to ppb range using optical fluorescence as transduction mechanism is presented. A fluorescent dye, which shows reversible fluorescence enhancement in the presence of ammonia is incorporated into a polymer matrix, the latter to ensure the accumulation of ammonia. The sensor material is integrated into a prototype of a miniaturized sensor device, facilitating long-term operation. To calibrate the optical sensor system a gas standard generator, producing standard gas mixtures, is used, leading to a sensitivity down to lower ppm concentrations of ammonia. 2017 13. Dresdner Sensor-Symposium 2017 13. Dresdner Sensor-Symposium 2017 Dresden, Germany 04.12.2017 06.12.2017 P4.02, 272 276 10.5162/13dss2017/P4.02 2017-12-07 OPUS4-43209 Posterpräsentation Bartelmeß, Jürgen; Gawlitza, Kornelia; Bartholmai, Matthias; Rurack, Knut Developments towards the fluorescence based sensing of hazardous gases Fluorescence based sensing is a versatile approach for the trace analysis outside of the laboratory, requiring suitable sensor materials and their integration into sensing devices. The versatility of fluorophores as probes, especially in terms of the possibility to tailor their optical as well as their recognition properties by synthetic modifications in a wide range, renders them a superior active component for the preparation of optical sensor devices. Recent works at BAM in this field include, for example, the detection of nerve gas agents, illustrating impressively the aforementioned benefits of fluorophores in optical sensing applications. In the interdisciplinary approach presented here, we target hazardous gases such as ammonia, benzene, and hydrogen sulfide, next to others, which pose a major threat to human health and environmental safety and for which the availability of a sensitive and reliable detection method is highly desirable. The dyes presented follow a "turn-on" fluorescence schematic which allows for the selective and sensitive detection of the respective gaseous analyte. The immobilization of the probe in polymeric matrices is then the next step toward the fabrication of a prototype device for molecular sensing. 2017 Colloquium of Optical Spectrometry (COSP) 2017 Berlin, Germany 27.11.2017 29.11.2017 2017-12-01