Lindqvist型多酸-苯胺杂化固体的合成及光谱法检测维生素C

Synthesis and Spectrometric Detection of Lindqvist Acid and Aniline Hybrid Solid

以Lindqvist型六钼多酸为无机组分、苯胺为有机组分,采用二环己基碳二亚胺(DCC)脱水法合成了共价键结合的六钼多酸苯胺杂化固体,采用核磁共振谱(~1 HNMR和^(13)CNMR)、红外光谱(IR)、紫外-可见光谱(UV-Vis)对产物进行了光谱分析。结果显示,与苯胺相比,杂化物UV-Vis光谱发生了较大程度的红移(37nm),表明Mo与N之间形成了叁键结构,增强了体系的共轭效应。红外光谱表明杂化物仍保持Lindqvist型多酸的结构。通过紫外-可见光谱法检测不同浓度的维生素C,发现杂化物溶液多次循环后吸光度没有明显的改变,表明紫外可见探针可循环使用。

Using Lindqvist hexamolybdate as an inorganic composite and aniline as an organic composite,a covalently linked hexamolybdopolyacid-aniline hybrid solid was synthesized by dehydration method with dicyclohexyl carbodiimide.The compound was characterized by 1HNMR,13 CNMR,IR and UV-Vis spectroscopy.The UV-Vis spectra of the compound showed that the apparent red-shifted band(about 37 nm)was observed compared with aniline,which confirmed that the triple bond formed between Mo and N,and further increased the conjugation of the system.IR spectra displayed that the compound kept the basic structure of Lindqvist polyacid.UV-Vis spectroscopy was used to detect different concentrations of Vitamin C.It was found that the absorbance of the hybrid solution didn’t change significantly after repeated cycles,indicating that the UV-visible probe can be recycled.