[Ln(BH4)2(THF)2] (Ln = Eu, Yb)—A Highly Luminescent Material. Synthesis, Properties, Reactivity, and NMR Studies

Autor:	Marija H. Habicht, Joachim G. Heck, Sebastian Marks, Claus Feldmann, Pascual Oña-Burgos, Peter W. Roesky
Rok vydání:	2012
Předmět:	chemistry.chemical_classification Lanthanide Inorganic chemistry Quantum yield chemistry.chemical_element General Chemistry Biochemistry Catalysis Divalent Colloid and Surface Chemistry chemistry Luminescent material Diamagnetism Physical chemistry Reactivity (chemistry) Luminescence Europium
Zdroj:	Journal of the American Chemical Society. 134:16983-16986
ISSN:	1520-5126 0002-7863
DOI:	10.1021/ja308077t
Popis:	The divalent lanthanide borohydrides [Ln(BH(4))(2)(THF)(2)] (Ln = Eu, Yb) have been prepared in a straightforward approach. The europium compound shows blue luminescence in the solid state, having a quantum yield of 75%. Nonradiative deactivation of C-H and B-H oscillator groups could be excluded in the perdeuterated complex [Eu(BD(4))(2)(d(8)-THF)(2)], which showed a quantum yield of 93%. The monocationic species [Ln(BH(4))(THF)(5)][BPh(4)] and the bis(phosphinimino)methanides [{(Me(3)SiNPPh(2))(2)CH}Ln(BH(4))(THF)(2)] have been prepared from [Ln(BH(4))(2)(THF)(2)]. They show significantly lower or no luminescence. Using the diamagnetic compound [{(Me(3)SiNPPh(2))(2)CH}Yb(BH(4))(THF)(2)], we performed a 2D (31)P/(171)Yb HMQC experiment.
Databáze:	OpenAIRE
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