Crystal Engineering of Rare Earth Amides: 3 [Tb(Im)3]@NH3, a Homoleptic 3D Network Exhib
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- 作者：Klaus Mü ; ller-Buschbaum ; Sonja Gomez-Torres ; Patrick Larsen ; Claudia Wickleder
- 刊名：Chemistry of Materials
- 出版年：2007
- 出版时间：February 20, 2007
- 年：2007
- 卷：19
- 期：4
- 页码：655 - 659
- 全文大小：303K
- 年卷期：v.19,no.4(February 20, 2007)
- ISSN：1520-5002
文摘
The solvent-free reaction of terbium metal with an imidazole melt (C3H4N2, ImH) yields single-crystalline
[Tb(Im)3]@NH3 (Im- = C3H3N2-, imidazolate anion) and hydrogen. Both N atoms of the imidazolaterings coordinate 
1 to terbium cations, thereby forming a homoleptic three-dimensional network. TheTb3+ ions exhibit complete nitrogen coordination, resulting in trigonal prisms as coordination polyhedraand C.N. = 6. The network contains cavities large enough to take up NH3 molecules, the latter formedby the partial decomposition reaction of the amine ligand in the melt reaction. Ammonia can be removedthermally or over time without decomposition of the network. Unsubstituted imidazole can thus be utilizedfor crystal engineering and the formation of rare earth amide network structures. The compound exhibitsan amazingly strong green emission. The emission spectrum shows the typical Tb3+ f-f transitions;additionally, an efficient ligand 
Tb3+ energy transfer is observed.
[Tb(Im)3]@NH3 (Im- = C3H3N2-, imidazolate anion) and hydrogen. Both N atoms of the imidazolaterings coordinate 1 to terbium cations, thereby forming a homoleptic three-dimensional network. TheTb3+ ions exhibit complete nitrogen coordination, resulting in trigonal prisms as coordination polyhedraand C.N. = 6. The network contains cavities large enough to take up NH3 molecules, the latter formedby the partial decomposition reaction of the amine ligand in the melt reaction. Ammonia can be removedthermally or over time without decomposition of the network. Unsubstituted imidazole can thus be utilizedfor crystal engineering and the formation of rare earth amide network structures. The compound exhibitsan amazingly strong green emission. The emission spectrum shows the typical Tb3+ f-f transitions;additionally, an efficient ligand Tb3+ energy transfer is observed.