摘要：A coordination polymer{[Cd(H_(2)dpa)(bpy)]·3H_(2)O}_(n)(Cd-CP)was designed and hydrothermal synthesized based on 4-(2,4-dicarboxyphenoxy)phthalic acid(H_(4)dpa),2,2'-bipyridine(bpy)and Cd(NO_(3))_(2)·4H_(2)*** structure was characterized by single-crystal X-ray diffraction,powder X-ray diffraction,elemental analysis,and infrared ***-CP belongs to the monoclinic crystal system with the P2_1/c space group and performs in a 1D double-chain *** adjacent double chains further form a 3D supramolecular network structure through hydrogen *** analysis shows that Cd-CP has good thermal *** analysis showed that Cd-CP had good choosing selectively and was sensitive to metal ions(Fe^(3+)and Zn^(2+)),2,4,6-trinitrophenylhydrazine(TRI),and pyrimethanil(Pth).Interestingly,when Cd-CP was used for fluorescence detection of metal ions,it was found to have a fluorescence quenching effect on Fe^(3+)but had an obvious enhancement effect on Zn^(2+).Therefore,we designed an“on-off-on”logic *** addition,the mechanism of fluorescence sensing has been deeply ***:2258625.

摘要：基于5-(3,4-二羧基苯氧基)间苯二甲酸(H_(4)dppa)配体,通过水热法设计并合成了2种镧系金属有机骨架(Ln-MOFs):{(dima)[Dy(dppa)(H_(2)O)_(2)]·2.5H_(2)O}n(Dy-MOF)和{(dima)[Eu(dppa)(H_(2)O)_(2)]·1.5H_(2)O}n(Eu-MOF)(dima=二甲胺阳离子)。并用元素分析、红外光谱、单晶X射线衍射等对其进行了结构表征。2种Ln-MOFs为异质同构的二维网状结构,相邻的二维网络通过氢键作用进一步形成三维超分子网络结构。荧光分析表明Dy-MOF和Eu-MOF在室温下具有优良的荧光性能,而且Dy-MOF还具有优异的荧光传感性能,可高效、高灵敏检测多种水中污染物:苯胺(ANI)、硝基苯(NB)、四环素(TC)、嘧霉胺(PTH)以及色氨酸(Trp)。此外还探究了Dy-MOF检测污染物时的荧光淬灭机理。