Three-Dimensional 3d−4f Heterometallic Coordination Polymers: Synthesis, Structures, and Magnetic Properties
datasetposted on 2005-07-25, 00:00 authored by Qi Yue, Jin Yang, Guang-Hua Li, Guo-Dong Li, Wei Xu, Jie-Sheng Chen, Su-Ning Wang
Three new 3d−4f heterometallic coordination polymers, [Ln2(H2O)4M2(H2O)2(QA)5]·nH2O (H2QA = quinolinic acid; Ln = Gd, M = Ni, n = 7 (1); Ln = Gd, M = Co, n = 6.5 (2); Ln = Dy, M = Co, n = 6.5 (3)), have been synthesized through hydrothermal pretreatment and cooling-down crystallization. These compounds possess the isostructural 3D frameworks with 1D chairlike channels along the c axis, which are occupied by noncoordinating water molecules. Crystal data: for 1, C35H41Gd2Ni2N5O33, orthorhombic, space group Pna21, with a = 28.567(6) Å, b = 14.498(3) Å, c = 12.250(2) Å, and Z = 4; for 2, C35H40Gd2Co2N5O32.5, orthorhombic, space group Pna21, with a = 28.843(3) Å, b = 14.4325(13) Å, c = 12.2275(9) Å, and Z = 4; for 3, C35H40Dy2Co2N5O32.5, orthorhombic, space group Pna21, with a = 28.8471(14) Å, b = 14.4534(10) Å, c = 12.2520(7) Å, and Z = 4. The magnetic behaviors for the three compounds have been investigated.