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作 者:付玉帛 赵莹莹[1] 田爱香[1] FU Yubo;ZHAO Yingying;TIAN Aixiang(College of Chemistry and chemical Engineering, Bohai University, Jinzhou 121013, China)
出 处:《渤海大学学报(自然科学版)》2018年第1期24-30,共7页Journal of Bohai University:Natural Science Edition
基 金:国家自然科学基金项目(No:21571023);辽宁省高等学校青年学者成长计划(No:LJQ2012097)
摘 要:在水热条件下,以Keggin型多金属酸阴离子为无机构筑单元,柔性配体1,1-(双-3-咪唑)乙醚(L1)和1,1'-(1,4-丁烷)双(咪唑)(L_2)作为有机构筑单元,两个多金属氧酸盐的超分子化合物就此获得,化合物1为[H_4(L1)_2(SiMo_(12)O_(40))]·2H_2O,化合物2为[H_(12)(PW_(12)O_(40))_3(L_2)_4].并分别对两个化合物进行了单晶X-射线衍射、元素分析和红外光谱表征.分析表明,化合物1属于三斜晶系,P-1空间群.化合物2属于单斜晶系,P 21/n空间群.化合物1的晶胞参数a=11.217(5),b=11.749(5),c=11.815(5),α=102.971(5)°,β=98.134(5)°,γ=115.631(5)°,V=2164.3(14)~3,Z=1,R_1=0.0485,ωR_2=0.0681.化合物2的晶胞参数a=11.776(5),b=20.062(5),c=34.500(5),α=90.000(5)°,β=94.500(5)°,γ=90.000(5)°,V=8126(4)~3,Z=2,R_1=0.0373,ωR_2=0.0999.在化合物1中,配体在Keggin型多酸阴离子两侧形成了双支撑结构.在化合物2中,配体环绕在多酸阴离子四周,呈现出多种存在状态.两个化合物均通过丰富的氢键作用形成了超分子框架结构.Under the hydrothermal conditions,Keggin-type polyoxometalates anion was used as the inorganic building block,and the flexible ligands 1,1-( bis-3-imidazoles) ether( L1) and 1,1’-( 1,4-butane)( Imidazole)( L2) as an organic building block,supramolecular compounds of two polyoxometallates were obtained. Compound 1 [H4( L1)2( SiMo12O40) ]·2 H2O and compound 2 [H12( PW12 O40)3( L2)4]. The two compounds were characterized by single crystal X-ray diffraction,elemental analysis and infrared spectrum. Analysis shows that compound 1 belongs to the anorthic system,space group P-1. Compound 2 belongs to the monoclinic,space group P 21/n. The unit cell parameters of compound 1: a = 11. 217( 5) ,b = 11. 749( 5) ,c = 11. 815( 5) ,α = 102. 971( 5) °,β = 98. 134( 5) °,γ = 115. 631( 5) °,V = 2164. 3( 14) 3,Z = 1,R1= 0. 0485,ωR2= 0. 0681. Compourd 2,a = 11. 776( 5) ,b = 20. 062( 5) ,c = 34. 500( 5) ,α = 90. 000( 5) °,β = 94. 500( 5) °,γ =90. 000( 5) °,V = 8126( 4) 3,Z = 2,R1= 0. 0373,ωR2= 0. 0999. In compound 1,the ligands form a double-support structure on both sides of Keggin type polyacid anion. In compound 2,the ligands are surrounded by polyanions,showing a variety of existing states. Both compounds formed supramolecular frameworks through abundant hydrogen bonding.
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