聚-2-氨基吡啶电化学合成及性质

Synthesis and Properties of Poly-2-aminopyridine

报导了在0.43mol·dm-3C6H6N2和0.01mol·dm-3NaOH中用循环伏安法合成聚-2-氨基吡啶.聚-2-氨基吡啶在1.0mol·dm-3ZnCl2(pH=4.99)溶液中的循环伏安图上有三对氧化-还原峰.旋转环-盘实验的结果表明,在2-氨基吡啶聚合的初期有中间体生成.由红外光谱可知,聚-2-氨基吡啶具有头-尾相接的结构.聚-2-氨基吡啶平均粒子大小约893nm,平均粒子间距约255nm.由聚-2-氨基吡啶正极和锌负极及2.5mol·dm-3ZnCl2溶液和3.0mol·dm-3NH4Cl(pH=5.5)溶液构成的电池,其放电曲线类似于Li-SOCl2,放电曲线的中间区域非常平稳.

Poly-2-aminopyridine was synthesized using potential cycling in the solution of 0.43 mol (.) dm(-3) 2-aminopyridine and 0.01 mol (.) dm(-3) NaOH. There are three pairs of redox peaks on the cyclic voltammogram of poly-2-aminopyridine in the solution of 1.0 mol (.) dm(-3) ZnCl2 (pH = 4.99). The experiments of rotating ring-disk electrode (RRDE) indicate that an intermediate is generated in the initiation of polymerization. The IR spectra indicate that poly-2-aminopyridine has head-to-tail structure. According to the results of atom force microscope the average particle size of poly-2-aminopyridine is about 893.4 run, and the average distance between particles is about 255 nm. The discharge behavior of the battery consisting poly-2-aminopyridine as cathode, and zinc as anode in an electrolytic solution of 2.5 mol (.) dm(-3) ZnCl2 + 3.0 mol (.) dm(-3) NH4Cl (pH = 5.5) is very similar to that of the battery of Li-SOCl2. The discharge curve is very flat in the middle region.