Syntheses of the terpyridine-bipyridine linked binary ligands and structural and redox properties of their cobalt complexes.
Syntheses of the terpyridine-bipyridine linked binary ligands and structural and redox properties of their cobalt complexes.
复制标题
DOI：
10.1021/ic900932j
复制
发表时间：
2009-08
影响因子：
4.6
通讯作者：
Hiroki Kon;T. Nagata
中科院分区：
文献类型：
--
作者：
Hiroki Kon;T. Nagata
通过不同长度的聚亚甲基链（1a-1d; n = 3-6，其中n为CH（2）单元的数目）的连接，合成了由2，2 '：6'，2“-三联吡啶和2，2 '-联吡啶组成的新型二元配体。合成了它们的Co（II）配合物2a-2d（Cl配合物）和2a '-2d'（H（2）O配合物）。他们专门形成单核配合物，这可能是氧化钴（III）配合物在水溶液中长时间暴露在空气中后。获得了2b和Co（III）配合物2c“的单晶，并测定了它们的晶体结构。Co（II）配合物的循环伏安图显示了三联吡啶、Co（II）/Co（I）和Co（III）/Co（II）的氧化还原过程。2a和2a'中Co（II）/Co（I）的氧化还原波与其它配合物的氧化还原波略有不同，这是由于2a和2a'中的多亚甲基链较短。
New binary ligands consisting of 2,2':6',2''-terpyridine and 2,2'-bipyridine were synthesized through the linkage of various lengths of the polymethylene chain (1a-1d; n = 3-6, where n is the number of CH(2) units). Their Co(II) complexes, 2a-2d (Cl complexes) and 2a'-2d' (H(2)O complexes), were synthesized. They exclusively formed mononuclear complexes, which could be oxidized to Co(III) complexes in aqueous solutions after prolonged exposure to the air. The single crystals of 2b and Co(III) complex 2c'' were obtained, and their crystal structures were determined. Cyclic voltammograms of the Co(II) complexes showed the redox processes of the terpyridine, Co(II)/Co(I), and Co(III)/Co(II). The redox waves of Co(II)/Co(I) in 2a and 2a' were slightly different from those of other complexes because of the short polymethylene chain.