Facile preparation and properties of multifunctional polyacetylene via highly efficient click chemistry
Facile preparation and properties of multifunctional polyacetylene via highly efficient click chemistry
复制标题
通过高效点击化学轻松制备多功能聚乙炔并表征其性能
作者：
Zhang Fayin;Ke Fuyou;Li Jing;Xu Hongyao;Guang Shanyi;Xu HY
采用高效的点击化学方法，设计合成了一系列新型的含恶二唑和偶氮基团的多官能聚乙炔。所得聚合物在普通有机溶剂中表现出良好的溶解性。通过FT-IR、1H-NMR、UV-vis、TGA和FL分析对聚合物的结构和性能进行了表征和评价。结果表明，由于官能团与主链之间的夹套效应，合成的功能化聚乙炔的热稳定性比单一聚乙炔有显著提高。并对恶二唑和偶氮基团的影响机理进行了讨论。同时，对功能化聚乙炔的光学性质进行了研究。研究发现，恶二唑和偶氮基团对聚乙炔的光学性能有一定的影响。对于P5-P7，在约100 nm处的吸收峰的强度大于约100 nm。452 nm，属于偶氮基团，随着M1含量的减少，其吸收峰逐渐减小。与此相反，吸收峰的强度在约。312 nm，属于恶二唑类，随着M2含量的增加而增加。由于在光热条件下偶氮基团的异构化，荧光猝灭发生在分子范围内的M1，P2和P3。
A series of novel multifunctional polyacetylenes bearing oxadiazole and azo groups as molecular pendants were designed and synthesized via highly effective click chemistry. The resultant polymers showed good solubility in common organic solvents. The structure and properties of the resulting polymer were characterized and evaluated by FT-IR, 1H-NMR, UV-vis, TGA and FL analyses. The results show that the thermal stability of the synthesized functional polyacetylene was significantly increased when compared to single polyacetylene due to the jacket effect between the functional groups and backbone. The influence mechanism of the oxadiazole and azo groups was also discussed in detail. Simultaneously, the optical properties of the functional polyacetylene were investigated. It was found that the optical properties of the resulting polyacetylene were affected by the oxadiazole and azo groups. For P5–P7, the intensity of the absorption peak at ca. 452 nm, belonging to the azo group, decreased gradually as the content of M1 was reduced. In contrast, the intensity of the absorption peak at ca. 312 nm, belonging to the oxadiazole group, increased as the content of M2 increased. Due to azo group isomerization under the photo-thermal conditions, quenching of the fluorescence occurred in the range of molecules for M1, P2 and P3.