含乙烯吡啶季铵盐侧基聚硅烷超分子的合成与表征

Synthesis and characterization of polysilane supramolecule with vinylpyridine quaternary ammonium salt as side chain

利用葫芦脲[6](CB[6])与季铵化乙烯吡啶聚硅烷在水溶液中于室温下进行超分子组装,得到一种新型取代聚硅烷超分子,并用1H-NMR和FT-IR对其结构进行了表征,实验结果表明CB[6]位于季铵化乙烯吡啶聚硅烷的侧基脂肪链上,通过非共价键与季铵化乙烯吡啶聚硅烷结合;通过热重分析(TGA)对其热性质进行了研究,超分子聚合物分解起始温度为360℃,至520℃失重为84%;通过紫外-可见吸收(UV-vis)、荧光(FLSC)对其光学性质进行了研究,超分子聚合物的最大吸收峰位于315 nm处,而在激发波长在315 nm下的最大波长位于460 nm处。结果表明超分子聚合物比相应的季铵化乙烯吡啶聚硅烷有更高的热稳定性,以及更强的紫外吸收和荧光性。

In this paper, a new kind of supramolecular polymer was prepared by supramolecular self-assembly of quaternized vi-nylpyridine polysilane（QPVMS）with cucurbituril[6]（CB[6]）in water at room temperature. The chemical structure characteriza-tion of all related products within the routes was carried out using fourier transform infrared spectroscopy（ FT-IR） ,and the chemical structure characterization of PVMS and QPVMS were carried out using 1 H-NMR. The results of structure characterization suggested that ideal products were synthesized successfully through designed routes,CB[6]beads are localized aliphatic chain in side-chain of quaternized vinylpyridine polysilane,and combine N＋by non-covalent bonds. The properties of supramolecular polymer and quatern-ized vinylpyridine polysilane were researched by thermogravimetry analysis（TGA）,ultraviolet visible absorption spectrophotometry （ UV-vis） and fluorescence spectrophotometer measurements. The initial decomposition temperature of supramolecular polymer was 360 ℃,and weight loss rate was only 84%when temperature was 520℃;the maximum UV absorption peak of supramolecular poly-mer was at 315nm;the maximum fluorescence emission peak of supramolecular polymer was respectively at 460 nm when excitation wavelength was 315 nm. The result showed that the supramolecular polymer had higher thermal stability,stronger absorption band than quaternized vinylpyridine polysilane.