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Synthesis of fluorescent blue, green, and red 1,1-substituted-2,3,4,5-tetraphenylgermacyclopentadienes and their utility as functional materials as chemical sensors, biological probes, and solid state emitters

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*Abstract

COMPOUNDS WITH FAVORABLE PHOTOLUMINESCENT PROPERTIES FOR DIVERSE SOLID-STATE APPLICATIONSResearchers at the University of Missouri-St. Louis have developed a new series of compounds exhibiting high fluorescence quantum yields in the solid state. These germanium heterocycles possess ideal photophysical and thermostability properties, which makes them excellent candidates for chemical or biological sensors, host materials for electroluminescent devices and solar cells, and emissive and for electron-transport layer components in organic light emitting diode devices.The compounds have aggregates that fluoresce more strongly than their solutions, hence avoiding the phenomenon of aggregation-caused quenching (ACQ) of light emission. ACQ is notorious for rendering luminophores ineffective for solid-state photoluminescence applications. In order for luminescent materials to have practical applications in semiconducting and electronic devices, a luminophore should exhbit high fluorescence quantum yield in the solid state. The optical and electronic properties of the invented luminophores are intricately linked to their electronic structures, which may be tuned for the development of blue, green, and the more rare red light-emittig materials. As a result of these favorable photoluminescence properties, the compounds exhibit high fluorescence quantum yields in the solid state giving these novel compounds offer great promise for a diverse number of solid-state applications. Potential Applications-Materials for chemical and biological sensors-Components of light-emitting diodes (OLEDs) and thin-film transistors-Host luminescent materials for electroluminescent devices such as TV's, PC displays, cell phone displays and solar cells.Benefits-Materials with improved properties for constructing blue-green emitters compared to conventional molecules-Favorable luminescent properties in the solid-state-Structural modifications provide a useful alternative to currently available red emitters, which are few in number-Easy to synthesizeIP STATUS: US Patent Application REFERENCE NO.: 12UMS004-07LEAD INVENTORJanet Braddock-Wilking, Ph.D.Associate Professor of Chemistry and BiochemistryUniversity of Missouri-St. LouisProfessor Braddock-Wilking received her B.A. from the University of Missouri-St. Louis and her Ph.D. from Washington University. She joined the UMSL faculty in 1993 following a Postdoctoral Fellowship at Harvard and Mallinckrodt Medical Inc. Between 1993 and 2004 she was a Research Assistant Professor and then Research Associate Professor and Manager of the NMR Facility. In 2004 Dr. Braddock-Wilking was appointed to a tenure track position and was promoted to Associate Professor in 2010. CONTACT:Tamara WilgersDirector, Technology Commercialization & Economic DevelopmentUniversity of Missouri-St. Louiswilgerst@umsl.edu314-516-6884

*Principal Investigation

Name: Janet Wilking

Department:

Name: Teresa Bandrowsky, Graduate Research Assistant

Department:

Name: James Carroll II, Graduate Research Assistant

Department:

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国家/地区

美国