Syntheses and Structures of Two Heteronuclear Complexes with Glycine {[CuEr(Gly)5(H2O)2](ClO4)5·H2O}n and {[Cu2Gd2(Gly)10(H2O)4](ClO4)10·4H2O}n

稀土学报(英文版), 2002, 20(5): 343-347.

李宗圣 ^1, , 孙豪岭 ^2, , 寇会忠 ^3, , 韩士田 ^4, , 高松 ^5,

1.College of Chemistry and Molecular Engineering, State Key Laboratory of Rare Earth Materials Chemistry and Applications & PKU-HKU Joint Laboratory on Rare Earth Materials and Bioinorganic Chemistry, Peking University, Beijing 100871, China;Department of C

2.College of Chemistry and Molecular Engineering, State Key Laboratory of Rare Earth Materials Chemistry and Applications & PKU-HKU Joint Laboratory on Rare Earth Materials and Bioinorganic Chemistry, Peking University, Beijing 100871, China

3.College of Chemistry and Molecular Engineering, State Key Laboratory of Rare Earth Materials Chemistry and Applications & PKU-HKU Joint Laboratory on Rare Earth Materials and Bioinorganic Chemistry, Peking University, Beijing 100871, China

4.Department of Chemistry, Hebei Normal University, Hebei 050091, China

5.College of Chemistry and Molecular Engineering, State Key Laboratory of Rare Earth Materials Chemistry and Applications & PKU-HKU Joint Laboratory on Rare Earth Materials and Bioinorganic Chemistry, Peking University, Beijing 100871, China

基金项目: 教育部优秀青年教师资助计划国家自然科学基金(20125104) and NSFC (20023005) 国家自然科学基金(20023005) 国家重点基础研究发展计划(973计划)(G1998061305) the Research Fund for the Doctoral Program of Higher Education of China(20010001020)

Syntheses and Structures of Two Heteronuclear Complexes with Glycine {[CuEr(Gly)5(H2O)2](ClO4)5·H2O}n and {[Cu2Gd2(Gly)10(H2O)4](ClO4)10·4H2O}n

Keywords： rare earths

Two one-dimensional heterometallic coordination polymers {[CuEr(Gly)5(H2O)2](ClO4)5*H2O}n (1) and {[Cu2Gd2(Gly)10(H2O)4](ClO4)10*4H2O}n (2) (Gly = glycine) were synthesized and structurally and characterized magnetically. Complex 1 crystallizes in a triclinic space group of P1 with a=1.1769(2) nm, b=1.2289(3) nm, c= 1.4452(3) nm, α= 89.90(3)°, β= 71.88(3)°, γ= 62.15(3)°, and Z=2. The carboxyl groups of glycine molecules take two coordination modes. The first one acts as a bidentate bridging ligand only. The second is a tridentate bridge that coordinates to three different metal ions. Each erbium ion is eight coordinated, taking a distorted square antiprism arrangement. The copper ion has a square pyramidal coordination polyhedron. The topological structure of complex 2 is similar to complex 1, but there are some disparities in the bond lengths and bond angles. It is also triclinic space group of P1 with a= 1.2479(3) nm, b= 1.4489(3) nm, c=2.0885(4) nm, α= 109.56(3)°, β= 93.75(3)°, γ= 93.54(3)°, and Z=2. Variable temperature susceptibility measurements show that there is a weak ferromagnetic interaction between the Gd3+ and Cu2+ ions in complex 2.

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材料期刊网

Syntheses and Structures of Two Heteronuclear Complexes with Glycine {[CuEr(Gly)5(H2O)2](ClO4)5·H2O}n and {[Cu2Gd2(Gly)10(H2O)4](ClO4)10·4H2O}n

参考文献