新型锰基配位聚合物的合成及荧光传感性能  

Synthesis and Fluorescence Sensing Properties of Novel Mn-Based MOFs

作　　者：王策 姬占有 WANG Ce;JI Zhan-you(College of Chemistry and Material,Weinan Normal University,Weinan 714099,China;College of Chemistry and Chemical Engineering,Shaanxi University of Science and Technology,Xi'an 710021,China)

机构地区：[1]渭南师范学院化学与材料学院,陕西渭南714099 [2]陕西科技大学化学与化工学院,陕西西安710021

出　　处：《光谱学与光谱分析》2025年第3期658-664,共7页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金青年科学基金项目(22208202);陕西省高校科协青年人才托举计划项目(20210608);陕西省教育厅科研计划项目(22JK0373);渭南师范院人才项目(2021RC24)资助。

摘　　要：金属有机框架(MOFs)是金属离子或簇核与有机配体通过配位键连接,具有高度结构设计性的分子基功能材料。金属有机框架尤其在新型光学器件领域中显示出诱人的应用前景,有望成为极具应用价值的环保型功能发光材料。采用线型苯羧酸配体1,4-二(4-羧基苯基)苯(H_(2)tpdc),在溶剂热条件下合成无色透明晶体[Mn_(4)(OH)_(2)(tpdc)_(3)]·2CH_(3)CN(1)。通过X射线单晶衍射仪对该化合物表征,并对其热稳定性及荧光性质进行研究。结果表明,化合物1结晶在单斜晶系P2_(1/c)空间群,每个不对称单元中包含三个tpdc^(2-)配体阴离子,四个Mn^(2+),晶体生长为菱形二维层状结构。测定了化合物的激发光谱、发射光谱,并探索了其在水溶液中对不同阴阳离子的荧光响应。结果表明,化合物1能够从不同离子中有效识别Fe^(3+)、Cr_(2)O_(7)^(2-)和CrO_(4)^(2-),其中Fe^(3+)、Cr_(2)O_(7)^(2-)和CrO_(4)^(2-)的检出限分别为8.2×10^(-7)、6.7×10^(-7)和9.2×10^(-6)mol·L^(-1)。在Cr^(6+)及Fe^(3+)的荧光检测领域具有重要的应用潜力。Metal-organic Frameworks(MOFs)are a kind of molecular-based functional materials that are highly structurally designed by connecting metal ions or cluster nuclei with organic ligands through coordination bonds.Metal-organic frameworks show attractive application prospects especially in new optical devices,and are expected to become environmentally friendly functional luminescent materials with great application value.Therefore,a colorless transparent crystal[Mn_(4)(OH)_(2)(tpdc)_(3)]·2CH_(3)CN(1)was synthesized under solvothermal conditions using linear benzene-carboxylic acid ligand 1,4-bis(4-carboxyphenyl)benzene(H_(2)tpdc).The compound was characterized by an X-ray single-crystal diffractometer,and its thermal stability and fluorescence properties were studied.Compound 1 crystallizes in the monoclinic P2_(1/c)space group.Each misalignment unit of the compound contains four Mn^(2+)ions and three H_(2)tpdc^(2-1)igand anions in an asymmetric unit.The crystal growth is a rhomboid two-dimensional layered structure.The excitation and emission spectra of the complexes were measured,and the fluorescence responses of the complexes to different metal ions in aqueous solution were investigated.The experimental results show that compound 1 can sensitively detect Fe^(3+),Cr_(2)O_(7)^(2-)and CrO_(4)^(2-)ions from different ions.The detection limits of Fe^(3+),Cr_(2)O_(7)^(2-)and CrO_(4)^(2-)were 8.2×10^(-7),6.7×10^(-7),9.2×10^(-6)mol·L^(-1),respectively.

关 键 词：金属有机框架 拓扑结构 荧光性能 离子检测 

分 类 号：O482.31[理学—固体物理]