R6G@γ-CD-MOFs复合物的制备及其在Fe^(3+)离子传感中的应用

Preparation of R6G@γ-CD-MOFs Composites with Application in Sensing of Fe^(3+)Ion

利用γ‑环糊精(γ‑CD)、氢氧化钾、甲醇和水,制备了γ‑CD‑MOFs,并使用X射线粉末衍射、热重分析和扫描电镜对其结构、稳定性和形貌进行表征。由于γ‑CD‑MOFs的结构中含有一维孔道,在其孔道中引入黄光发射的罗丹明6G(R6G)染料,获得了荧光复合材料R6G@γ‑CD‑MOFs,并探索了其对不同金属离子的荧光响应情况。实验结果表明,R6G@γ‑CD‑MOFs能够从12种金属离子中选择性传感Fe^(3+)离子,在2×10^(-4)~2.0×10^(-2)mol·L^(-1)范围内其荧光猝灭常数(K_(sv))为1.03×10^(4)L·mol^(-1)。

γ-CD-MOFs were synthesized withγ-cyclodextrin(γ-CD),potassium hydroxide,methanol,and water,whose structure,stability,and morphology were characterized by X-ray diffraction,thermogravimetric analysis,and scanning electron microscope.Due toγ-CD-MOFs having a 1D channel,rhodamine 6G(R6G)with yellow light emission was introduced into the channel,to obtain a fluorescent composite R6G@γ-CD-MOFs and its fluorescence response to different metal ions was explored.The experimental results show that R6G@γ-CD-MOFs can selectively sense Fe^(3+)ions from 12 kinds of metal ions,and its fluorescence quenching constant(K_(sv))was 1.03×10^(4)L·mol^(-1)in a range of 2×10^(-4)-2.0×10^(-2)mol·L^(-1).