Self-assembly of 3d-4f “square-in-square” coordination clusters based on substituted diethanolamine ligands.
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| Title: | Self-assembly of 3d-4f “square-in-square” coordination clusters based on substituted diethanolamine ligands. |
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| Authors: | Mameri, Samir1 mameri@unistra.fr, Mereacre, Valeriu2 valeriu.mereacre@kit.edu |
| Source: | Inorganica Chimica Acta. Sep2016, Vol. 451, p52-58. 7p. |
| Subjects: | Molecular self-assembly, Coordination compounds, Diethanolamine, Ligands (Chemistry), Benzoic acid, Metal ions |
| Abstract: | The combination of substituted N -diethanolamine and pivalic (or benzoic) acid ligands has proved to be an extremely fruitful route for assembling in solution 3d/4f blends of metal ions within coordination clusters. In this article we wish to focus on the analysis of the synthetic routes for accessing 3d-Dy(III) coordination clusters with an overall [M III 4 Dy III 4 (μ 3 -OH) 4 (μ-X) 4 (O 2 CBu t ) 8 ( x -dea) 4 ]·solv formulation, where M = Mn, x = tert -butyl, X = N 3 − ( 1 ), X = OCN − ( 2 ), X = NO 3 − ( 3 ); M = Cr, x = methyl, X = N 3 − ( 4 ); solv = MeCN or toluene, and [Fe III 4 Dy III 4 (μ 3 -OH) 4 (O 2 CC 6 H 4 CH 3 ) 12 ( n- bdea) 4 ]·2CH 3 CN ( 5 ). The metal topology in the aggregates can be described as consisting of a “Dy 4 -square inscribed in a M 4 -square”. Complexes 1 – 4 were prepared from reaction of t -butyldiethanolamine ( t -bdeaH 2 ) or methyldiethanolamine (mdeaH 2 ) with preformed polynuclear compounds or simple salts of transition metals (Mn(II) and Cr(II)), Dy(NO 3 ) 3 ·6H 2 O and in the presence or absence of NaN 3 or NaNCO if appropriate. Complex 5 was obtained from the reaction between n- bdeaH 2 and Dy(NO 3 ) 3 ·6H 2 O with [Fe 3 O( m -CH 3 C 6 H 4 COO) 6 (H 2 O)(C 2 H 5 OH) 2 ](NO 3 )·2H 2 O. It was found that the nature of the central bridging ligands, i.e. N 3 − , OCN − or NO 3 − , does not appear to have significant influence on the structural features of the isolated manganese derivatives. Concerning the synthesis of the Fe derivative, it was found important to use a different type of diethanolamine ligand and a different carboxylic acid as well. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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