Ikeda Masato, Tanaka Yoshie, Hasegawa Takashi, Furusho Yoshio, Yashima Eiji
Yashima Super-structured Helix Project, ERATO, Japan Science and Technology Agency (JST), 101 Creation Core Nagoya, 2266-22 Moriyama-ku, Nagoya 463-0003, Japan.
J Am Chem Soc. 2006 May 31;128(21):6806-7. doi: 10.1021/ja0619096.
We describe the construction of the first double-stranded metallosupramolecular helical polymers. We designed and synthesized a supramolecular duplex comprised of complementary m-terphenyl-based strands bearing a chiral amidine or achiral carboxylic acid together with two pyridine groups at the four ends. Supramolecular polymerization of the duplex with cis-PtPh2(DMSO)2 in 1,1,2,2-tetrachloroethane produced the double-stranded metallosupramolecular polymer with a controlled helicity of which the two complementary metallostrands are intertwined through the amidinium-carboxylate salt bridges. The structures and hydrodynamic dimensions of the metallosupramolecular polymers were characterized by 1H NMR, diffusion-ordered NMR, dynamic light scattering, absorption, and CD measurements. The polymeric structure was also visualized by atomic force microscopy.
我们描述了首个双链金属超分子螺旋聚合物的构建。我们设计并合成了一种超分子双链体，其由互补的间三联苯基链组成，这些链带有手性脒或非手性羧酸，并且在四个末端带有两个吡啶基团。该双链体与顺式二氯二甲基铂（Ⅱ）在1,1,2,2-四氯乙烷中进行超分子聚合反应，生成了具有可控螺旋度的双链金属超分子聚合物，其中两条互补的金属链通过脒基-羧酸盐桥相互缠绕。通过核磁共振氢谱、扩散排序核磁共振、动态光散射、吸收光谱和圆二色光谱测量对金属超分子聚合物的结构和流体力学尺寸进行了表征。聚合物结构也通过原子力显微镜进行了可视化。
