The First Examples of Selenidogermanate Salts with Lanthanide Complex Counter Cations: Solvothermal Syntheses and Characterizations of [{Ln(en)3}2(μ‐OH)2]Ge2Se6 (Ln = Eu,Ho) and [{Ho(dien)2}2(μ‐OH)2]Ge2Se6 |
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| Authors: | Weiwei Tang Jingjing Liang Wenqing Jiang Bing Wu Dr. Yong Zhang Prof. Dr. Dingxian Jia |
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| Affiliation: | Key Laboratory of Organic Synthesis of Jiangsu Province, , College of Chemistry, Chemical Engineering, and Materials Science, Soochow University, Dushu Lake Campus, Suzhou, 215123, P. R. China |
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| Abstract: | The lanthanide selenidogermanates [{Eu(en)3}2(μ‐OH)2]Ge2Se6 ( 1 ), [{Ho(en)3}2(μ‐OH)2]Ge2Se6 ( 2 ), and [{Ho(dien)2}2(μ‐OH)2]Ge2Se6 ( 3 ) (en = ethylenediamine, dien = diethylenetriamine) were solvothermally prepared by the reactions of Eu2O3 (or Ho2O3), germanium, and selenium in en and dien solvents respectively. Compounds 1 – 3 are composed of selenidogermanate [Ge2Se6]4– anion and dinuclear lanthanide complex cation [{Ln(en)3}2(μ‐OH)2]4+ (Ln = Eu, Ho) or [{Ho(dien)2}2(μ‐OH)2]4+. The [Ge2Se6]4– anion is composed of two GeSe4 tetrahedra sharing a common edge. The dinuclear lanthanide complex cations are built up from two [Ln(en)3]3+ or [Ho(dien)2]3+ ions joined by two μ‐OH bridges. All lanthanide(III) ions are in eight‐coordinate environments forming distorted bicapped trigonal prisms. In 1 – 3 , three‐dimensional supramolecular networks of the anions and cations are formed by N–H ··· Se and N–H ··· O hydrogen bonds. To the best of our knowledge, 1 – 3 are the first examples of selenidogermanate salts with lanthanide complex counter cations. |
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| Keywords: | Selenium Germanium Selenidogermanates Lanthanides Solvothermal synthesis Crystal structures |
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