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Temperature-Dependent Organic Functionalization of {Ni6PW9} Species: from Isolated Clusters to 1D Chain |
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| Authors: | Bin Cai Jun-Wei Zhao Bai-Feng Yang Huan He Guo-Yu Yang |
| Institution: | 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: | Four new hexa-nickel(II)-substituted Keggin-type tungstophosphates Ni6(μ3-OH)3(oeen)3(H2O)3(B-α-PW9O34)]·6H2O (1, oeen = N-(2-hydroxyethyl)enediamine), Ni6(μ3-OH)3(oeen)3(H2O)4(B-α-PW9O34)]2·13H2O (2), Ni6(μ3-OH)3(oeen)2(tran)(H2O)3(B-α-PW9O34)]·3H2O (3, tran = 1,4,7-triazonane) and Ni6(μ3-OH)3(oeen)2(tran)(H2O)2(B-α-PW9O34)]·6H2O (4) have hydrothermally made by controlling their reaction temperatures. 1–4 have been characterized by elemental analyses, IR spectra, powder X-ray diffraction, thermogravimetric analyses and single-crystal X-ray diffraction, respectively. Structural analyses reveal that they consist of {Ni6(μ3-OH)3(H2O) n }9+ cores and B-α-PW9O34 (PW9) units, and further are stabilized by organic neutral oeen/tran molecules. 1–3 are isolated clusters while 4 is the 1D chain structure. It should be noted that the tran molecules in 3 and 4 are derived from the oeen molecules in the starting materials. |
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