Chinese Journal of Applied Chemistry ›› 2017, Vol. 34 ›› Issue (4): 486-488.DOI: 10.11944/j.issn.1000-0518.2017.04.160366

• Full Papers • Previous Articles    

Syntheses, Structures and Near Infrared Luminescence of a Series of Ln(Ⅲ) Coordination Polymers

HU Xiaoshuang,WANG Yanmei,WANG Yan,LI Yanying,YANG Yanhong,CHI Yuxian(),JIN Jing,NIU Shuyun   

  1. School of Chemistry and Chemical Engineering,Liaoning Normal University,Dalian,Liaoning 116029,China
  • Received:2016-09-12 Accepted:2016-12-05 Published:2017-03-31 Online:2017-03-31
  • Contact: CHI Yuxian
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.21133005), Scientific Research Project of Liaoning Provincial University(No.L2014424, No.L2011193)

Abstract:

Five novel Ln(Ⅲ) coordination polymers, {[Ln2(1,3-bdc)3(H2O)4](DMF(H2O}n(Ln=Pr(1), Nd(2), Gd(3)) and {[Ln4(1,3-bdc)6(H2O)4(DMF)](DMF(2H2O}n(Ln=Er(4), Ho(5))(1,3-bdc=isophthalic acid, DMF=N,N-dimethyl formamide), have been synthesized by hydrothermal methods and characterized by single-crystal X-ray diffraction, infrared spectroscopy(IR), ultraviolet-visible-near infrared(UV-Vis-NIR) and fluorescence spectroscopy. The results show that coordination polymers 1 to 3 are isomorphous and crystallized in the monoclinic with space group P2(1)/n, and coordination polymers 4 and 5 are isomorphous and belong to the triclinic system with space group P-1. Polymers present multidimensional structures due to versatile coordination modes of 1,3-bdc2- in crystals. Except for coordination polymer 4, others exhibit NIR luminescent properties that are associated with UV-Vis-NIR absorption spectra.

Key words: Ln(Ⅲ) coordination polymer, crystal structure, near infrared luminescence