In:
Zeitschrift für anorganische und allgemeine Chemie, Wiley, Vol. 636, No. 9-10 ( 2010-09), p. 1720-1725
Abstract:
The solvent free reaction route produces coordination polymers that have a dimensionality of the linkage, which is increasing with the thermal energy. The synthesis of the 3D metal organic framework (MOF) structure $\rm ^3_\infty[Eu(Btz)_2]$ marks the final thermal reaction step within the system europium/1 H ‐1,2,3‐benzotriazole. It can be obtained by a reaction of the metal with a melt of benzotriazole above 230 °C or from thermal treatment of the 1D coordination polymer $\rm ^1_\infty[Eu(Btz)_2(BtzH)_2]$ (Btz – = 1,2,3‐benzotriazolate anion, C 6 H 4 N 3 – ; BtzH = 1 H ‐1,2,3‐benzotriazole, C 6 H 5 N 3 ), which is formed first at about 100 °C from the same reagents. In addition to the trivalent rare earth ions it can thus be shown that also divalent Eu II together with benzotriazole exhibits transformation of a 1D coordination polymer into a 3D MOF. The homoleptic framework $\rm ^3_\infty[Eu(Btz)_2]$ exhibits a high thermal stability (525 °C) for an exothermically decomposing coordination compound. As $\rm ^3_\infty[Eu(Btz)_2]$ is always obtained as a microcrystalline product, structure solution and refinement were achieved by X‐ray powder techniques. For further characterization 151 Eu‐Mössbauer, IR, and Raman spectroscopy as well as micro and thermal analysis were carried out.
Type of Medium:
Online Resource
ISSN:
0044-2313
,
1521-3749
DOI:
10.1002/zaac.v636:9/10
DOI:
10.1002/zaac.201000077
Language:
English
Publisher:
Wiley
Publication Date:
2010
detail.hit.zdb_id:
201094-X
detail.hit.zdb_id:
1481139-X
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