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High-resolution Thermal Micro-imaging Using Europium Chelate Luminescent Coatings
Published on: April 16, 2017
Long Wavelength Excitation of Europium Luminescence in Extended, Carboline-Based Cryptates
Carolin Dee1, David Esteban-Gómez2, Carlos Platas-Iglesias2
1Institute of Inorganic Chemistry , University of Tübingen , Auf der Morgenstelle 18 , 72076 Tübingen , Germany.
Abstract:
Two new β-carboline-based tris(biaryl) europium cryptates are introduced. The extended antenna moiety incorporated into the cryptand frameworks enables the sensitization of europium emission with excitation wavelengths well above 450 nm. In aqueous solution, the cryptates show great complex stability, luminescence lifetimes around 0.5 ms, and absolute quantum yields of ca. 3%. In addition, the europium luminescence shows a well-defined pH-dependence in the physiologically interesting pH range 7-9.
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