Nishinaka Kumiko, Han Jiandong, Han Dongli, Liu Yue, Du Yanqing, Wang Meiling, Eerdun Chaolu, Naruse Nobuyasu, Mera Yutaka, Furusho Yoshio, Tsuda Akihiko
Department of Chemistry, Graduate School of Science, Kobe University, Kobe, Japan.
Department of Pharmaceutical Sciences, Inner Mongolia Medical University, Hohhot, China.
Front Chem. 2020 Dec 1;8:613932. doi: 10.3389/fchem.2020.613932. eCollection 2020.
Metal-organic 1D-coordination polymers, having unique electronic and optical properties, are expected to be a novel advanced functional material capable of fabricating smart plastics, films, and fibers. In this study, we have synthesized a novel metal-organic 1D-coordination polymer composed of a phenylene-bridged bipyrrole bearing -alkylimino groups (BPI) and palladium(II) ion. The BPI and Pd(II) form square planar bis(bidentate) complex to form a metal coordinated π-conjugation polymer (Poly-BPI/Pd). It is stable in solutions at room temperature, and allowed measurement of its average molecular weight in SEC ( = 106,000 and = 18,000, / = 5.88). It also provided a reversible multi redox profile in cyclic voltammetry, most likely originating from strong π-electronic interactions between the BPI components via Pd ion. A variety of substituent groups can be attached to the imino-nitrogens of BPI. A coordination polymer composed of a BPI derivative bearing chiral alkyl chains and Pd(II) showed strong circular dichroism (CD) in the solution due to the unidirectional chiral conformation of the BPI components in the polymer backbone.
具有独特电子和光学性质的一维金属有机配位聚合物有望成为一种能够制造智能塑料、薄膜和纤维的新型先进功能材料。在本研究中，我们合成了一种新型的一维金属有机配位聚合物，它由带有 - 烷基亚氨基的亚苯基桥联联吡咯（BPI）和钯（II）离子组成。BPI和Pd（II）形成平面正方形双（双齿）配合物，从而形成金属配位的π共轭聚合物（Poly-BPI/Pd）。它在室温下的溶液中稳定，并且可以在尺寸排阻色谱法中测量其平均分子量（ = 106,000， = 18,000， / = 5.88）。它在循环伏安法中还呈现出可逆的多氧化还原曲线，这很可能源于BPI组分之间通过钯离子的强π电子相互作用。各种取代基可以连接到BPI的亚氨基氮上。由带有手性烷基链和Pd（II）的BPI衍生物组成的配位聚合物在溶液中表现出强烈的圆二色性（CD），这是由于聚合物主链中BPI组分具有单向手性构象。
