Trung Vu Quoc, Duong Tran Thi Thuy, Dua Nguyen Thi, Linh Nguyen Ngoc, Cuong Lai Dang, Thao Dao Phuong, Huy Vo Khac, Phuong Nguyen Hoang Ha, Hien Nguyen, Linh Duong Khanh, Manh Vu Quoc, Chinh Nguyen Thuy, Hoang Thai, Van Meervelt Luc
Faculty of Chemistry, Hanoi National University of Education, Hanoi, Vietnam.
Tay Ho High School, Hanoi, Vietnam.
Des Monomers Polym. 2022 Jun 9;25(1):136-147. doi: 10.1080/15685551.2022.2086413. eCollection 2022.
Eight polythiophene derivatives containing pyrazoline side groups were synthesized by a chemical oxidative coupling polymerization using FeCl. The crystal structures of four monomers were determined which confirm the almost perpendicular orientation of the thiophene and pyrazoline rings, while the other substituents are more coplanar. Analyses of IR, H-NMR, Raman and UV-Vis spectra demonstrated that the suggested polymerization was successful to generate the synthesized polythiophenes with the expected structures. The morphology of the synthesized polythiophenes was studied by SEM. The different substituents attached to the 1- and 3-positions of the pyrazoline side chain led to differences in optical properties, electrical conductivity, and thermal stability of the synthesized polythiophenes. By adding a pyrazoline side chain to polythiophenes, some polymers achieve good solubility, electrical conductivity of about 1.3 × 10 S/cm, high fluorescence intensity (above 40,000 a.u.) at 505-550 nm and thermal stability up to 590°C in the air.
通过使用FeCl进行化学氧化偶联聚合反应，合成了八种含有吡唑啉侧基的聚噻吩衍生物。确定了四种单体的晶体结构，证实了噻吩环和吡唑啉环几乎垂直取向，而其他取代基则更共面。红外光谱、氢核磁共振谱、拉曼光谱和紫外可见光谱分析表明，所建议的聚合反应成功地生成了具有预期结构的合成聚噻吩。通过扫描电子显微镜研究了合成聚噻吩的形态。连接在吡唑啉侧链1位和3位上的不同取代基导致合成聚噻吩的光学性质、电导率和热稳定性存在差异。通过向聚噻吩中添加吡唑啉侧链，一些聚合物具有良好的溶解性、约1.3×10 S/cm的电导率、在505 - 550 nm处高达40000 a.u.以上的高荧光强度以及在空气中高达590°C的热稳定性。
