Chinese Journal of Applied Chemistry ›› 2017, Vol. 34 ›› Issue (9): 1059-1065.DOI: 10.11944/j.issn.1000-0518.2017.09.170189

• Full Papers • Previous Articles     Next Articles

A Fluorescent Magnesium-Based Metal-Organic Framework with a Sensitive Sensing Property for Carbon Disulfide

GONG Liaokuoab,SONG Yinga,SHEN Nannanab,ZHANG Boab,WU Zhaofenga*(),HUANG Xiaoyinga*()   

  1. aState Key Laboratory of Structural Chemistry,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China
    bUniversity of Chinese Academy of Sciences,Beijing 100049,China
  • Received:2017-06-01 Accepted:2017-06-22 Published:2017-08-31 Online:2017-08-31
  • Contact: WU Zhaofeng,HUANG Xiaoying
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.21403233), the 973 Program(No.2014CB845603)

Abstract:

Presented here are the solvothermal synthesis, structural characterization and fluorescent properties of a magnesium metal-organic framework(Mg-MOF), namely [Mg4(1,4-NDC)4(DMA)2(CH3OH)2(H2O)2]·DMA·CH3OH(1, 1,4-H2NDC=1,4-naphthalene dicarboxylic acid, DMA=N,N'-Dimethylacetamide). Single-crystal X-ray diffraction studies revealed that compound 1 crystallized in the monoclinic space group P21/c(No.14) with a=2.06090(12) nm, b=2.21014(13) nm, c=1.50385(10) nm, β=111.399(3)°, V=6.3776(7) nm3, Z=4, Dc=1.403 g/cm3, F(000)=2824, R=0.0596 and wR=0.1225(I>2σ(I)). The structure of compound 1 features a three-dimensional(3D) network constructed from the 1,4-NDC ligands as bridging linkers and binuclear magnesium clusters as the secondary building units, with cages occupied by different solvent molecules of DMA and CH3OH. Notably, fluorescence studies revealed that compound 1 demonstrated sensitive sensing towards carbon disulfide(CS2); remarkably, the fluorescence intensity of compound 1 could be almost completely quenched at the low concentration of 0.4%(volume fraction) of CS2. Thermal stability was investigated by thermogravimetric analysis which indicated that compound 1 could be stable up to 140 ℃.

Key words: magnesium, metal-organic framework, fluorescence sensor, carbon disulfide