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Journal of Coordination Chemistry Volume 66, 2013 - Issue 4
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Articles

Effect of lanthanide contraction on the Ln/Sb/Se/dien system: solvothermal syntheses and characterizations of lanthanide(III)-selenidoantimonate complexes with diethylenetriamine as a co-ligand

Ruihong Chen College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, P.R. China
,
Weiwei Tang College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, P.R. China
,
Wenqing Jiang College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, P.R. China
,
Yong Zhang College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, P.R. China
&
Dingxian Jia College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, P.R. ChinaCorrespondence[email protected]
Pages 650-661 | Received 08 Sep 2012, Accepted 13 Nov 2012, Published online: 28 Feb 2013
 
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Abstract

The ternary system Ln/Sb/Se was investigated in a diethylenetriamine (dien) solvent under solvothermal conditions and two types of neutral lanthanide(III)–selenidoantimonate complexes [Ln(dien)2(μ-η1,η2-SbSe4)]n (Ln = Pr(1), Nd(2)) and [Ln(dien)2(η2-SbSe4)] (Ln = Sm(3), Gd(4)) were prepared. The lanthanide ions form [Ln(dien)2]3+ cations with two dien chelating ligands. In 1 and 2, is a tridentate μ-η1,η2-SbSe4 bridging ligand to connect [Ln(dien)2]3+ into one-dimensional coordination polymers [Ln(dien)2(μ-η1,η2-SbSe4)]n; it coordinates to [Sm(dien)2]3+ and [Gd(dien)2]3+ as a η2-SbSe4 bidentate chelating ligand, forming 3 and 4. Ln3+ in 1–2 and 3–4 are nine- and eight-coordinate environments, forming distorted monocapped square antiprisms and bicapped trigonal prisms, respectively. The different coordination modes of between 1–2 and 3–4 are related to size of Ln3+. Complexes 1–4 exhibit semiconducting properties with band gaps of 2.08–2.28 eV.

Acknowledgments

This work was supported by the National Natural Science Foundation of P.R. China (No. 20771077, 21171123) and the Priority Academic Program Development of Jiangsu Higher Education Institutions.

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