一例对二硫化碳具有荧光传感性能的Mg-金属有机框架化合物(英文)  

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

作　　者：宫辽阔[1,2] 宋颖[1] 申南南[1,2] 张波[1,2] 吴兆锋[1] 黄小荥[1] 

机构地区：[1]中国科学院福建物质结构研究所结构化学国家重点实验室,福州350002 [2]中国科学院大学,北京100049

出　　处：《应用化学》2017年第9期1059-1065,共7页Chinese Journal of Applied Chemistry

基　　金：Supported by the National Natural Science Foundation of China(No.21403233);the 973 Program(No.2014CB845603)~~

摘　　要：通过溶剂热合成了一例Mg-MOF化合物[Mg_4(1,4-NDC)_4(DMA)_2(CH_3OH)_2(H_2O)_2]·DMA·CH_3OH(1,1,4-H_2NDC=1,4-萘二酸,DMA=N,N'-二甲基乙酰胺),并对其结构表征及荧光性能进行了研究。单晶X射线研究结果表明,化合物结晶于P21/c空间群,其晶体学数据为a=2.06090(12)nm,b=2.21014(13)nm,c=1.50385(10)nm,β=111.399(3)°,V=6.3776(7)nm^3,Z=4,Dc=1.403 g/cm^3,F(000)=2824,R=0.0596,wR=0.1225(I>2σ(I))。化合物1中,二核的镁作为次级构筑单元通过桥连配体1,4-NDC连接形成沿c轴方向拓展的一维链。一维链间进一步通过配体连接形成3D框架的化合物。荧光性能研究表明,化合物1对CS_2具有灵敏的荧光传感性能,在0.4%的体积分数条件下可引起CS_2荧光的完全淬灭。此外,化合物1的热稳定性也通过热重分析进行了研究,发现其可稳定到140℃左右。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 （ C H3 OH） 2 （ H2 O） 2] ·DMA· CH3 OH （ 1, 1,4-H2 NDC = 1,4-naphthalene dicarbexylic 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, Do = 1. 403 g/cm3, F（000） = 2824, R = 0.0596 and wR = 0. 1225 （I 〉 2σ（I） ）. The structure of compound I 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℃.

关 键 词：镁 金属有机框架化合物 荧光传感 二硫化碳 

分 类 号：O614[理学—无机化学]