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Highly Emissive Lanthanide Compounds in Sol-Gel Derived Materials

Published online by Cambridge University Press:  21 February 2011

Ronald B. Lessard ,
Kris A. Berglundl  and
Daniel G. Nocera
Ronald B. Lessard
Affiliation:
Departments of Chemistry and Agricultural Engineering, and the Center for Fundamental Materials Research at Michigan State University, East Lansing, MI 48824
Kris A. Berglundl
Affiliation:
Departments of Chemical Engineering and Agricultural Engineering, and the Center for Fundamental Materials Research at Michigan State University, East Lansing, MI 48824
Daniel G. Nocera
Affiliation:
Departments of Chemistry and Agricultural Engineering, and the Center for Fundamental Materials Research at Michigan State University, East Lansing, MI 48824
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Abstract

Molecular composites that possess unique emission properties have been prepared by introducing luminescent molecules into sol-gel based silica glasses. The lumophores chosen for study are terbium(III) and europium(III) ions whose emissions are quenched in aqueous and sol-gel environments owing to coordination of water molecules to the lanthanide ion. To overcome the quenching process the ions have been encapsulated within cryptands. The resulting terbium(IU) and europium(III) cryptates possess long-lived excited states in both aqueous solution and solgel glassy matrices. Measurements of the excited state dynamics of these molecularly engineered composites demonstrate the feasibility of tailoring molecules to retain their excited state properties in sol-gel derived glasses.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 155: Symposium L – Processing Science of Advanced Ceramics , 1989 , 119
Copyright
Copyright © Materials Research Society 1989

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