新型芳香多羧酸的合成及荧光性质

Synthesis and Luminescent Properties of New Aromatic Polycarboxylic Acids

芳香多羧酸常用于构筑金属有机框架(MOFs)材料,为了增加MOFs材料的比表面积,从而提高材料对气体的吸附性能,分别以1,3,5-三溴苯和9,10-二溴蒽为原料,通过Suzuki偶联反应设计合成两个芳香多羧酸配体,即3,3'-(9,10-蒽二基)-二苯甲酸和三-(3'-羧基苯基)苯(H3TCPB),其中前者为新化合物,其结构经1HNMR、13CNMR和HRMS表征。由于含蒽材料具有强荧光性能,研究了3,3'-(9,10-蒽二基)-二苯甲酸的固体室温UV/Vis和荧光激发光谱。结果表明,该化合物的最大吸收λmax为252和366 nm,最大发射波长为428 nm,具有发紫光的性质。使用配体H3TCPB和锌盐水热合成一个MOF,即{[Zn4(TCPB)2(OH)2(CH3OH)(DMF)3]·2DMF·H2O}∞。BET比表面积测试结果表明,其比表面积为290 m2/g。

Aromatic polycarboxylic acid ligands are usually used to build metal-organic frameworks （MOFs）. In order to increase surface area and to enhance the adsorption enthalpies of gas ,3,3＇-（9,10-anthracenediyl） dibenzoic acid and tris（ 3＇-carboxyphe- nyl） benzene were synthesized from 9,10-dibromo anthracene and 1,3,5-tribromobenzene by bromination, Suzuki coupling and hy- drolytic reaction,respectively. The structures were confirmed by t HNMR, 13CNMR and HRMS. The former is a new compound. The optical properties of 3,3＇-（9,10-anthracenediyl）dibenzoic acid were investigated by UV/Vis and fluorescence emission spec- trum in the solid state. The results show that the absorbance maxima is 252 nm and 366 nm,and the emission maxima in the solid state is 428 nm. The result reveals that 3,3＇-（9, lO-anthracenediyl）dibenzoic acid possesses purple fluorescence property. A MOF, { [ Zn4 （TCPB） 2 （ OH ） 2 （ CH3 OH ） （DMF） 3 ] ·2DMF· H2O} , has been constructed out of H3 TCPB and Zn salt under hy- drothermal condition. The BET surface area is 290 m2/g.