Hydrothermal Synthesis, Structure and Magnetic Property of a Novel Hexa-NiⅡ Substituted Polyoxometalate  

作　　者：李兵 赵俊伟 郑寿添 杨国昱 

机构地区：[1]State Key Laboratory of Structural Chemistry,Fujian Institute of Research on the Structure of Matter,The Chinese Academy of Sciences,Fuzhou,Fujian 350002,China [2]Department of Chemistry,Zhejiang Forestry University,Lin'an 311300,China

出　　处：《Chinese Journal of Structural Chemistry》2009年第5期519-524,共6页结构化学（英文）

基　　金：Supported by the NNSF for Distinguished Young Scholars of China (No. 20725101);the 973 program (No. 2006CB932900);the NNSFC (No. 20521101);the NSF of Fujian Province (No. E0510030);Key Project from CAS (No. KJCX2-YW-H01)

摘　　要：A novel hexa-NiⅡ substituted trilacunary Keggin polyoxometalate [{Ni6（μ3- OH）3（en）3（H2O）6}（B-α-PW9O34）]-6H2O 1 （en = ethylenediamine） has been hydrothermally synthesized and characterized by IR spectra, elemental analysis, thermogravimetric analysis （TGA）, single-crystal X-ray diffraction and magnetic property. Compound 1 crystallizes in the hexagonal space R3c with a = 20.4124（5）, c = 21.4427（4）A, γ = 120.000°, V = 7737.5（3）A3, Z = 6, GOF = 1.083, R （wR） = 0.0317 （0.0610）. Single-crystal X-ray diffraction indicates that 1 contains a hexa-Nin substituted trivacant Keggin [{Ni6（μ3-OH）3（en）3（H2O）6}（B-α-PW9O34）] unit. The magnetic study shows the presence of ferromagnetic coupling interactions within hexa-Nin clusters with J1 = 0.69 cm-1 and J2 = 0.92 cm^-1 for 1.A novel hexa-NiⅡ substituted trilacunary Keggin polyoxometalate [{Ni6（μ3- OH）3（en）3（H2O）6}（B-α-PW9O34）]-6H2O 1 （en = ethylenediamine） has been hydrothermally synthesized and characterized by IR spectra, elemental analysis, thermogravimetric analysis （TGA）, single-crystal X-ray diffraction and magnetic property. Compound 1 crystallizes in the hexagonal space R3c with a = 20.4124（5）, c = 21.4427（4）A, γ = 120.000°, V = 7737.5（3）A3, Z = 6, GOF = 1.083, R （wR） = 0.0317 （0.0610）. Single-crystal X-ray diffraction indicates that 1 contains a hexa-Nin substituted trivacant Keggin [{Ni6（μ3-OH）3（en）3（H2O）6}（B-α-PW9O34）] unit. The magnetic study shows the presence of ferromagnetic coupling interactions within hexa-Nin clusters with J1 = 0.69 cm-1 and J2 = 0.92 cm^-1 for 1.

关 键 词：POLYOXOMETALATES nickle hydrothermal synthesis Keggin structure 

分 类 号：O631.3[理学—高分子化学]