Preparation of polymer complexes with π-conjugated polymer ligands and control of catalytic functionalities

利用金属有机偶联反应，如ni - pd配合物介导的C-C偶联，制备了多种金属偶联聚合物配体。聚合物配体由吡啶、2,2′-联吡啶、1,10-菲罗啉、双咪唑、8-喹啉、2,2′-双噻唑和Salen型配体等配位单元组成。根据它-共轭体系的扩展，聚合物的紫外-可见吸收峰向更长的波长移动。在加入Cu（II）、Ni（II）、Ru（II）和Zn（II）化合物等金属物质后，其共轭聚合物配体形成各种金属配合物。在络合物形成过程中，观察到紫外-可见吸收光谱的变化。金属配合物常表现出光致发光。金属配合物还表现出以下功能：(1)与电催化反应相关的电化学活性，(2)光学功能和(3)导电性。已知一些配合物可作为H_2从水介质光演化和氧化还原反应的催化剂。

Various it-conjugated polymer ligands have been prepared by using organometallic coupling reactions such as Ni-and Pd-complex mediated C-C coupling. The obtained polymer ligands were constituted of coordinating units such as pyridine, 2,2'-bipyridyl, 1,10-phenanthroline, biimidazole, 8-quinolinol, 2,2'-bithiaziazole, and Salen type ligand. According to expansion of the it-conjugation system, the polymers showed shifts of the UV-vis absorption peak of the unit to a longer wavelength. The it-conjugated polymer ligands form various metal complexes on addition of metal species such as Cu(II), Ni(II), Ru(II), and Zn(II) compounds. On the complex formation, changes in the UV-vis absorption spectra were observed. The metal complexes often showed photoluminescence. The metal complexes also showed functionalities such as (1)electrochemical activity which were expected to he related electrocatalytic reactions, (2)optical functionalities, and (3)electrical conductivity. Some complexes are known to serve as catalysts for photoevolution of H_2 from aqueous media and for redox reactions.