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Amino Acid Functionalization of {Ni6PW9}-Based Clusters Under Hydrothermal Conditions |
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| Authors: | Bin Cai Bai-Feng Yang Huan He Jun-Wei Zhao Guo-Yu Yang |
| Affiliation: | 1. MOE Key Laboratory of Cluster Science, School of Chemistry, Beijing Institute of Technology, Beijing, 100081, China 2. Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, Henan, China 3. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, Fujian, China |
| Abstract: | Two novel hexa-nickel(II)-substituted Keggin-type {Ni6PW9}-based tungstophosphates [Ni6(μ 3-Tris)(en)3(Pr)(damp)(H2O)2(B-α-PW9O34)]·10H2O (1) and [Ni6(μ 3-Tris)(en)3(damp)2(H2O)2(B-α-PW9O34)]·7H2O (2) (en = ethylenediamine, Pr = CH3CH2COO?, damp = 2-aminoisobutyrate, Tris = pentaerythritol) were hydrothermally synthesized and characterized by IR spectra, elemental analyses, powder X-ray diffraction, thermogravimetric analyses, and single-crystal X-ray diffraction. Crystal data for 1: orthorhombic, Pca21, a = 21.6962(7) Å, b = 20.6398(5) Å, c = 14.7825(4) Å, β = 90º, V = 6619.7(3) Å3, Z = 4; for 2: orthorhombic, Pca21, a = 21.6978(9) Å, b = 20.6658(7) Å, c = 14.7767(4) Å, β = 90º, V = 6625.9(4) Å3, Z = 4. 1 consists of a {Ni6(μ 3-Tris)(en)3(Pr)(damp)(H2O)2}9+ core and a [B-α-PW9O34]9? (PW9) unit and is covalently functionalized by one Pr and one damp, as well as en and Tris ligands. The structure of 2 is the same to 1 except that the Pr anion in 1 is substituted by the other damp ligand. Most interestingly, 1 contains four kinds of organic ligands, while 2 includes three kinds of organic ligands, which are first observed in polyoxometalate chemistry. |
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