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

通过金属有机偶联反应，如镍、钯配合物介导的C-C偶联反应，合成了各种金属有机偶联聚合物配体。得到的聚合物配体由吡啶、2，2‘-联吡啶、1，10-菲咯啉、联咪唑、8-喹啉、2，2’-联噻唑和Salen型配体等配位单元组成。根据it-共轭体系的展开，聚合物的UV-Vis吸收峰向更长的波长移动。在金属物种如铜(II)、镍(II)、Ru(II)和锌(II)的加入下，它与聚合物形成不同的金属络合物。在络合物形成过程中，观察到了紫外可见吸收光谱的变化。金属络合物经常表现出光致发光。金属络合物还表现出如下功能：(1)与电催化反应有关的电化学活性；(2)光学功能；(3)导电性。一些络合物被认为是水介质中H_2光分解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.