采用水热法，利用五羧酸配体3，5-二(2'，4'-二羧基苯基)苯甲酸(H5L)制备了2种结构相似的镧系-钴异核双金属有机骨架(Ln-Co-MOF)∶(C2H6NH2)5{[Eu9Co(L)6(H2O)5(OH)4]·5DMF}n(1)、(C2H6NH2)2{[Sm9Co(L)6(H2O)3Cl]·5DMF}n(2)，并通过单晶 X 射线衍射、粉末X射线衍射、热重、红外、荧光光谱和磁性对其进行了结构表征和性能测试。结果表明，配合物1和2均属于三方晶系R3空间群，均具有新颖的三维结构和良好的热稳定性。其中配合物1具有较强的荧光性能，可以灵敏地识别药物分子柳氮磺吡啶和有机分子戊二醛，检出限分别可以达到0。95和2。10 µmol·L-1。此外，配合物1和2在1 kOe时均具有反铁磁性。
Two Ln-Co(Ln=Eu,Sm)metal-organic frameworks:Structures,magnetism,and fluorescent sensing sulfasalazine and glutaraldehyde
We used pentacarboxylic acid ligand 3,5-di(2',4'-dicarboxylphenyl)benzoic acid(H5L)to synthesize two structural similarity lanthanide-cobalt heteronuclear bimetallic organic frameworks(Ln-Co-MOFs)by hydrothermal method:(C2H6NH2)5{[Eu9Co(L)6(H2O)5(OH)4]·5DMF}n(1),(C2H6NH2)2{[Sm9Co(L)6(H2O)3Cl]·5DMF}n(2).The struc-tures were characterized and the property was tested by single crystal X-ray diffraction,powder X-ray diffraction,thermogravimetry,infrared,fluorescence spectra,and magnetism.The results show that 1 and 2 both belong to the trigonal R3 space group and have novel 3D structures and good thermal stability.Among them,1 has strong fluores-cence properties,which can sensitively identify drug molecules sulfasalazine and organic molecules glutaraldehyde.The detection limits could reach 0.95 and 2.10 μmol·L-1,respectively.In addition,1 and 2 were antiferromagnetic at 1 kOe.CCDC:2343234,1;2343236,2.
万方数据
