配合(NH_4)_(3)[Ho(2,6-pidic)_(3)]·C_(2)H_(5)NO_(2)·4H_(2)O的晶体结构、热力学性质及磁性  

Crystal structure,thermodynamic and magnetism properties of coordination compound(NH_(4))_(3)[Ho(2,6-pidic)3]·C_(2)H_(5)NO_(2)·4H_(2)O

作　　者：柯越 张雅琦 张晓帆 吕雪川 黄雪 高肖汉 KE Yue;ZHANG Ya-qi;ZHANG Xiao-fan;LV Xue-chuan;HUANG Xue;GAO Xiao-han(School of Petrochemical Engineering,Liaoning Petrochemical University,Fushun 113001,China)

机构地区：[1]辽宁石油化工大学石油化工学院,辽宁抚顺113001

出　　处：《化学研究与应用》2023年第7期1661-1669,共9页Chemical Research and Application

基　　金：国家自然科学基金项目(21003069,21103078)资助。

摘　　要：本文选取具有特殊光学和磁学性质的稀土Ho^(Ⅲ)为中心金属离子,以配位模式丰富多变2,6-吡啶二羧酸为配体,合成具有新颖的三帽三棱柱结构单元,以氢键链接的三维空间构型的配合物(NH_4)_(3)[Ho(2,6-pidic)_(3)]·C_(2)H_(5)NO_(2)·4H_(2)O单晶(CCDC 2234634)。X单晶衍射表明配合物属于单斜晶系,P2_1/n空间群,晶胞参数为a=10.1947(4)?,b=19.0499(8)?,c=16.6609(6)?,β=92.081(1)°,V=3233.55?~3,Z=4。中心金属离子HoⅢ与同源于三个不同的2,6-吡啶二羧酸的六个羧基O及三个N构建九配位的三帽三棱柱的空间构型,三帽三棱柱在氢键O-H…O及N-H…O作用下,形成三维框架结构的单晶。配合物的热力学分析表明,在548 K时,配合物(NH_(4))_(3)[Ho(2,6-pidic)_(3)]·C_(2)H_5NO_(2)·4H_(2)O开始分解,最终得到钬的氧化物和氮化物。对磁性测试结果分析,表明配合物中的金属离子HoⅢ之间具有反铁磁性作用。The novel three dimensional framework lanthanide compound(NH_(4)_(3)[Ho(2,6-pidic)_(3)]·C_(2)H_(5)NO_(2)·4H_(2)O(CCDC 2234634)was synthesized by tricapped trigonal prism structure was formed of 2,6-pyridine dicarboxylic acid with multitudinous co-ordination modes as ligand and lanthanide HoⅢwith particular photology and magnetism with the help of hydrogen bonding.The compound belonged to monoclinic system in P21/n spare group by means of the characterization of XRD for crystallographic struc-ture.The cell parameters showed that a=10.1947(4)A,b=19.0499(8)A,c=16.6609(6)A,β=92.081(1)°,V=3233.55A^(3),Z=4.Ho^(Ⅲ) was nine coordinated which was comprised of six carboxylic O atoms and three N atoms in three 2,6-pidic to form tri-capped trigonal prism structure.Three dimensional framework was achieved by hydrogen bonding O-H…O and N-H…O.The ther-modynamic and magnetism measurements exhibited antiferromagnetic among lanthanide Ho^(Ⅲ) and[Ho(2,6-pidic)3]3-collapsed be-yond 548 K to obtain the oxide and nitride of Ho finally.

关 键 词：稀土配合物 2 6-吡啶二羧酸 单晶结构 热力学性质 反铁磁性 

分 类 号：O614.33[理学—无机化学]