中文摘要：

由缩氨基脲和2-喹啉醛合成了席夫碱配体H2L,并与过渡金属离子Cd2＋组装得到了四边形配合物CQ。用X射线衍射对配合物的晶体结构进行了测定,发现其具有I41/a空间群。通过荧光测试发现该配合物在CH3CN溶液中具有较强的荧光,加入间苯二甲酸、对苯二甲酸阴离子后荧光发生淬灭,而加入邻苯二甲酸阴离子荧光无变化,可以将邻苯二甲酸阴离子从其他2种二酸阴离子中区分出来。

英文摘要：

A novel Cd-based tetranuclear complex CQ（[Cd4H2L4]（NO3）2·14H2O,where H2L=bis[2-Quinoline methyl] carbohydrazone） has been synthesized via self-assembly.Single-crystal X-ray diffraction analysis shows that CQ is a molecular square,which crystallizes in an I41/a space group.CQ shows a strong fluorescent emission band in CH3CN solution.The fluorescent titration experiment shows the CQ has a fluorescent quenching effect toward p-phthalate and m-phthalate dicarboxylates,while silent for the o-phthalate one,suggesting it can be used as a fluorescent chemosensor for distinguishing o-phthalate from two other isomers of dicarboxylates.CCDC： 791184.