对苯二胺缩对苯二甲醛席夫碱及其配合物的制备和电化学性能

以对苯二胺和对苯二甲醛为原料缩合制备出对苯二胺缩对苯二甲醛席夫碱聚合物（PT），研究了采用不同物质的量之比的单体所制备的聚合物的电化学性能。利用席夫碱聚合物中N原子上的孤对电子与不同金属离子配位形成席夫碱配位聚合物（PT-M），并对所形成聚合物的电化学性能进行了研究。采用X射线衍射（XRD）、红外（IR）、热重-差示扫描量热法（TG-DSC）、扫描电子显微镜（SEM）和能谱（EDS）对产物进行了表征，PT-M的XRD峰强度相比于PT明显降低，表明金属离子配位进入分子链骨架中引起的空间位阻减少了分子链排列的有序性。采用循环伏安、恒电流充放电和交流阻抗评价了所制备的配位聚合物材料的电化学性能。研究发现，聚席夫碱铝配合物（PT-Al）表现出较优的电化学性能，在0.5 A·g^-1的电流密度下其电容值为649.6 F·g^-1，并且具有较好的循环稳定性，在8 A·g^-1的电流密度下循环1 000次后仍有80.9%的电容保持率。

Schiff Bases Containing p-Phenylenediamine and p-Phenylenedicarbaldehyde and Their Complexes: Preparation and Electrochemical Properties

The polymeric Schiff base (PT) was synthesized by the condensation reaction of p-phenylenediamine and terephthalaldehyde, and electrochemical properties of PT with different molar ratios of monomers were investigated. The lone pair electron of the nitrogen atom in the PT can coordinate with various metal ions (PT-M), and the results measured indicate that PT-M possesses better electrochemical performance compare with PT. The as-prepared samples were characterized by X-ray diffraction (XRD), infrared spectrum (IR), thermogravimetry-differential scanning calorimetry (TG-DSC), scanning electron microscope (SEM) and energy spectrum (EDS). The intensity of XRD peaks of PT-M decreased in comparison with the PT, indicating that the tendency of molecular chain arrangement from order to disorder because metal ions entering polymer molecular skeleton through coordination chemical bonds. Electrochemical properties of PT and PT-M were evaluated by means of cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), and electrochemical impedance spectroscopy (EIS). The results show that the polymeric Schiff base aluminum complex (PT-Al) exhibits outstanding electrochemical performance, and its capacitance can reach 649.6 F·g^-1 at a current density of 0.5 A·g^-1, together with remaining 80.9% after 1 000 GCD cycles at the current density of 8 A·g^-1.