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机构地区:[1]延安大学化学与化工学院,陕西省化学反应工程重点实验室,陕西延安716000
出 处:《江西师范大学学报(自然科学版)》2013年第6期599-602,646,共5页Journal of Jiangxi Normal University(Natural Science Edition)
基 金:陕西省大学生创新创业训练计划(1238);延安大学自然科学专项基金(YDZ2013-09)资助项目
摘 要:在水热条件下合成了一个新颖的Pr(Ⅲ)配合物[Pr(pda)0.5(nbca)2(H2O)2](pda=间苯二乙酸,nbca=5-硝基[1,1'-联苯]3-羧酸),并利用元素分析、X-单晶衍射、红外光谱、热重分析等对其进行表征.结果表明,该配合物属于单斜晶系,空间群为C12/c1,a=2.726 38(13)nm,b=1.010 66(5)nm,c=2.143 87(10)nm,β=94.258(1)°,V=5.891 0(5)nm3,Z=8.晶体结构分析表明:在该配合物中Pr3+离子是1个8配位的配合离子,2个配体作为间隔物将稀土金属离子Pr3+链接形成[-Pr-pda-Pr-nbca-]n Z字形链,由5-硝基[1,1'-联苯]3-羧酸羧基的桥连支撑将1维链拓展为2维(6,6)波浪网面.A novel two-dimensional ( 2 D ) compound [ Pr (1,3-pda) 0.5 (nbca) 2 ( H2O ) 2 ] ( pda = 1,3-phenylenedi- acetic acid, nbca = 5-nitro [ 1,1 '-biphenyl ] -3-carboxylic acid) was obtained through hydrothermal reaction and char- acterrized by means of elemental analysis, IR, TG-DSC and single crystal X-ray diffraction. The results show that the compound is monoclinic,with space group C12/c1 ,α =2. 726 38( 13)nm,b = 1. 010 66(5) nm,c =2. 143 87(10) nm ,β = 94. 258 ( 1 ) °, V = 5.891 0 (5) nm^3, Z = 8. The crystal structure of compound revealed that Pr^3+ ion is eight coordination mode in the compound, the pda and nbca ligands bridge the Pr^3+ ions to form a [-Pr-pda-Pr-nbca-] n one-dimensional ( 1 D) Z chain. Moreover, these one-dimensional ( 1 D) Z chains are united together through the nbca ligands to afford a 2D (6,6) layer.
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