荧光MOF的合成及选择性识别甲醇和氢氧根

Synthesis and Selective Sensing of Methanol and Hydroxyl of Fluorescent MOF

通过溶剂热技术,硝酸铕和均苯并菲三酸(H_(3)TTCA)在N,N-二甲基乙酰胺(DMA)溶剂中反应获得了一例荧光金属-有机框架(MOF)[Eu(TTCA)(DMA)(H_(2)O)]·1.5DMA·19H_(2)O(1).单晶测试结果表明1属单斜晶系,结晶于C2/c空间群.1是基于一维孔道的三维配位聚合物,且表现出强红色荧光.将1浸泡在一系列有机溶剂(如甲醇、乙醇、丙酮、氯仿、1,4-二氧己烷、二甲基亚砜)和NaX(X=F^(-)、Cl^(-)、Br^(-)、OH^(-))中时,1可通过荧光猝灭现象选择性识别甲醇分子和氢氧根离子,且可循环使用5次.

Solvothermal reaction of triphenylene-2,6,10-tricarboxylicacid(H_(3)TTCA)with Eu(NO_(3))_(3) in N,N-dimethyl acetamid(DMA)gave a fluorescent metal-organic framework(MOF):[Eu(TTCA)(DMA)(H_(2)O)]·1.5DMA·19H_(2)O(1).The result of single X-ray structural analysis reveals that 1 crystallizes in the monoclinic space group C2/c.1 is a three-dimensional framework with one-dimensional channels.Moreover,1 shows strong red fluorescence and selective sensing of methanol and hydroxide by fluorescence quenching method after exposure to a series of organic solvents such as methanol,ethanol,acetone,chloroform,1,4-dioxane,DMSO and NaX(X=F^(-),Cl^(-),Br^(-),OH^(-)).In addition,the quenching and regeneration cycles can be repeated for 5 times,without loss of its luminescent intensity.