Syntheses and crystal structures of two self-assembled dizinc(II) helicates with novel hydrazone linked polypyridyl ligands
作者:Hsien-Chang Kao、Yi-Chun Wang、Wen-Jwu Wang
DOI:10.1007/s11164-016-2426-x
日期:2017.6
The rationally designed polydentate ligands, L 1 and L 2, based on the pyridinyl moiety and the hydrazone fragment have been synthesized to coordinate zinc(II) ions. We utilize pyridine as a rigid core connecting two bipyridines as ligand building blocks with a hydrozone linker for the L 1. The L 2 has a reversed design in which a bipyridine was used as a hinging-available building block of the ligand
合成了基于吡啶基部分和the片段的合理设计的多齿配体L 1和L 2以配位锌(II)离子。我们利用吡啶作为刚性核心,将两个联吡啶作为配体构件与L 1的氢键连接。在大号 2具有相反的设计,其中一个联吡啶作为配体芯的铰接可用积木,具有腙连接体连接两个哒嗪臂。通过L 1和L 2的反应获得了两种新型的螺旋二锌(II)配合物用乙腈中的高氯酸锌(II)。两个螺旋结构的结构通过X射线衍射法确认。单链螺旋状Zn 2 L 1包含两个被氧原子桥接的锌离子。除了L 2配体,在双链螺旋状Zn 2 L 2 2中的两个锌离子之间没有发现其他桥联物质。通过紫外可见光谱滴定实验研究了溶液状态下螺旋状Zn 2 L 1的自组装过程。逐步形成常数暗示了螺旋产物的形成具有正性的协同行为。