Homoleptic imidazolate frameworks (3)(infinity)[Sr1-xEux(Im)(2)]-hybrid materials with efficient and tuneable luminescence.

Zurawski, Alexander; Mai, Marit; Baumann, Dominik; Feldmann, Claus and Müller-Buschbaum, Klaus (2011): Homoleptic imidazolate frameworks (3)(infinity)[Sr1-xEux(Im)(2)]-hybrid materials with efficient and tuneable luminescence. In: Chemical Communications, Vol. 47, No. 1: pp. 496-498

Abstract

Homoleptic frameworks of the formula 3∞[Sr1−xEux(Im)2] (1) x = 0.01–1.0; Im− = imidazolate anion, C3H3N2−) are hybrid materials that exhibit an intensive green luminescence. Tuning of both emission wavelength and quantum yield is achieved by europium/strontium substitution so that a QE of 80% is reached at a Eu content of 5%. Even 100% pure europium imidazolate still shows 60% absolute quantum efficiency. Substitution of Sr/Eu shows that doping with metal cations can also be utilized for coordination compounds to optimize materials properties. The emission is finely tuneable in the region 495–508 nm via variation of the europium content. The series of frameworks 3∞[Sr1−xEux(Im)2] presents dense MOFs with the highest quantum yields reported for MOFs so far.

• Item Type: Journal article
• Form of publication: Publisher's Version
• Faculties: Chemistry and Pharmacy
• Subjects: 500 Science > 540 Chemistry
• Alliance/National Licence: This publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence (funded by the DFG, German Research Foundation) respectively.
• Language: English