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构筑了一种基于组氨酸与Cu(Ⅱ)配位作用的新型凝胶光子晶体传感器,并研究了其对溶液中Cu(Ⅱ)的传感性能。Cu(Ⅱ)与固载有组氨酸的凝胶光子晶体在配位力的驱动下发生作用,导致凝胶光子晶体产生体积溶胀,引起其Bragg衍射峰发生红移。考察了组氨酸用量、溶液pH值、离子强度等条件对Cu(Ⅱ)传感性能的影响,最后得到凝胶光子晶体的Bragg衍射峰位移值Δλ与Cu(Ⅱ)浓度对数(10~(-9)~10~(-5)mol·L~(-1)范围内)呈线性关系,依此实现了溶液中Cu(Ⅱ)的简便定量检测。此外,还考察了传感过程的可逆性、响应速度等,并对其传感机理作了初步探索。
A novel gel photonic crystal sensor based on the coordination of histidine and Cu (Ⅱ) was constructed, and its sensing performance on Cu (Ⅱ) in solution was also studied. Cu (Ⅱ) and the solid-supported gel photonic crystal with histidine function under the coordination force, resulting in the volumetric swelling of the gel photonic crystal, causing the red shift of the Bragg diffraction peak. The influence of the amount of histidine, the pH value of the solution and the ionic strength on the sensing performance of Cu (Ⅱ) were investigated. Finally, the Bragg diffraction peak shift Δλ and the logarithm of Cu (Ⅱ) (-9) ~ 10 ~ (-5) mol·L ~ (-1)), and the simple and quantitative determination of Cu (Ⅱ) in solution was achieved. In addition, the reversibility and response speed of the sensing process were also investigated, and the sensing mechanism was also explored.