| After decades of research,more and more metal-organic framework materials have been synthesized in the laboratory.Their excellent performance and application prospects in the fields of new energy,gas adsorption and separation,photocatalysis,and detection have made countless researchers fascinated by this.But so far,there were still huge challenges in designing and synthesizing a target product with a specific structure.This article use nitrogen-containing dibasic aromatic carboxylic acid N,N-bis(4-carbonylbenzyl)aminobenzene and nitrogen-containing ligand to react with metal ions under solvothermal conditions.Finally,17 metal organic framework materials with novel structures and excellent performance were obtained.We have discussed and studied the structure and properties of the complex,and the results obtained were as follows:1.Select N,N-bis(4-carbonylbenzyl)aminobenzene(H2L)and several nitrogen-containing ligands and transition metals to prepare 11 kinds of complexes under solvothermal conditions,named[Co L(bibp)]n(1)?[Cd(L)(bibp)]n(2)?[Mn(L)(bibp)]n(3)?[Zn(L)(bip)(H2O)4]n(4)?{[Cd2(L)(biyf)](H2O)3}n(5)?{[Cu(L)2(bide)](H2O)(DMF)}n(6)?{[Zn2(L)2(bied)2]H2O}n(7)?{[Cd(L)2(bied)2](H2O)2}n(8)?[Cd2(L)2(bpdp)(H2O)2]n(9)?[Cd(L)2(bif)2(H2O)]n(10)?[Cd(L)(bib)]n(11),through X-ray single crystal diffraction,X-ray powder diffraction,elemental analysis,ultraviolet analysis,fluorescence analysis and thermogravimetric analysis to study the structure and properties of the complex.Complexes 2 and 11 were able to detect Fe3+in water with Ksv of 2.553×10~5 and 7.545×10~4 M-1.2.Select N,N-bis(4-carbonylbenzyl)aminobenzene(H2L),several nitrogen-containing ligands and rare earth metals to prepare 6 complexes under solvothermal conditions,named as{[La2(L)3(DMF)(H2O)3]H2O}n(12),[Ce2(L)3]n(13),{[Eu2(L)3(DMF)2(H2O)](H2O)2}n(14),{[Tb2(L)3(DMF)2(H2O)](H2O)2}n(15),[Er4(L)6(DMF)]n(16)?{[Tm4(L)6(DMF)3](DMF)2}n(17).Analyzing them,we found that the complexes 12,13,14,15 have the same two-dimensional layered structure,and the complexes 16,17 have the same three-dimensional structure.For further characterization,we found that complex 12 is capable of adsorbing the dye CR up to80%;complexes 14 and 15 have excellent fluorescence characteristics,and complex15 can detect small molecules 4-NP and Fe3+ions in solution,with Ksv=7.56×10~4 and1.90×10~4 M-1,respectively.Secondly,using the characteristic light blue,red and green of the rare earth elements La,Eu,Tb,the three complexes 12,14,and 15 were mixed in a certain proportion to prepare a white light material that can be applied to LEDs.When the ratio was adjusted to La:Eu:Tb=0.91:0.06:0.03,the color coordinates of the light excited by the material at ex=351nm are(0.3335,0.331),which was similar to the color coordinates of standard white light(0.333,0.333),the result was satisfactory. |
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