Chemical Research in Chinese Universities ›› 2019, Vol. 35 ›› Issue (4): 693-699.doi: 10.1007/s40242-019-9058-9

• Articles • Previous Articles     Next Articles

Syntheses, Crystal Structures, Magnetic and Near-infrared Luminescence Properties of 3d-4f Coordination Polymers Cu2Pr2, Cu2Eu2 and Cu4Tb2

ZHONG Liangxuan1, LIU Mingyue1, ZHANG Bowei1, SUN Yaqiu1,2, XU Yanyan1   

  1. 1. Tianjin Key Laboratory of Structure and Performance for Functional Molecule, College of Chemistry, Tianjin Normal University, Tianjin 300387, P. R. China;
    2. Key Laboratory of Advanced Energy Materials Chemistry, Ministry of Education, Nankai University, Tianjin 300071, P. R. China
  • Received:2019-02-28 Revised:2019-06-04 Online:2019-08-01 Published:2019-08-01
  • Contact: SUN Yaqiu, XU Yanyan E-mail:hxxysyq@tjnu.edu.cn;hxxyxyy@tjnu.edu.cn
  • Supported by:
    Supported by the Program for Innovative Research Team in University of Tianjin, China(No.TD12-5038), and the "111 Project" of Nankai University, China(No.B12015).

Abstract: Three new 3d-4f heterometallic coordination polymers(CPs), namely,[Pr2(CuL)2(nipt)3(H2O)]×2H2O (Cu2Pr2, 1),[Eu2(CuL)2(nipt)3(H2O)]×2H2O(Cu2Eu2, 2) and[Tb2(CuL)4(nipt)3]·8.3H2O(Cu4Tb2, 3)(CuL, H2L=2,3-dioxo-5,6,14,15-dibenzo-1,4,8,12-tetraazacyclo-pentadeca-7,13-dien; nipt2‒=5-nitroisophthalate) were obtained by a solvothermal method and structurally characterized by single-crystal X-ray diffraction analyses, elemental analyses, Fourier transform infrared spectra and ultraviolet visible absorption spectra. In Cu2Pr2 and Cu2Eu2, m3-bridged and m5-bridged nipt2‒ ligands alternately linked three Ln3+ and five metal ions(three Ln3+ and two Cu2+ ions) to generate a 2D heterometallic framework with 3,3,4,5-connected (3.4.5)(32.42.5.63.72)(42.63.8)(42.6) topology. In Cu4Tb2, m2-bridged and m4-bridged nipt2- ligands alternately connected two Tb3+ and four metal ions(two Tb3+ and two Cu2+ ions) by carboxylating into a corrugated heterometallic 2D layer with 3-connected (63) topology. The magnetic properties of Cu2Pr2 and Cu2Eu2 were also discussed, the results show that both CPs have a weak antimagnetic interaction. Moreover, the near-infrared luminescence properties of Cu2Pr2 and Cu2Eu2 were also studied.

Key words: Heterometallic coordination polymer, Crystal structure, Magnetic property