Preston Dan, Findlay James A, Crowley James D
Department of Chemistry, University of Otago, PO Box 56, Dunedin, 9054, New Zealand.
MacDiarmid Institute for Advanced Materials and Nanotechnology, New Zealand.
Chem Asian J. 2019 Apr 15;14(8):1136-1142. doi: 10.1002/asia.201801132. Epub 2018 Sep 20.
Molecular recognition continues to be an area of keen interest for supramolecular chemists. The investigated [M(L) ] metallo-ligands (M=Pd , Pt , L=2-(1-(pyridine-4-methyl)-1 H-1,2,3-triazol-4-yl)pyridine) form a planar cationic panel with vacant pyridyl binding sites. They interact with planar neutral aromatic guests through π-π and/or metallophilic interactions. In some cases, the metallo-ligands also interacted in the solid state with Ag either through coordination to the pendant pyridyl arms, or through metal-metal interactions, forming coordination polymers. We have therefore developed a system that reliably recognises a planar electron-rich guest in solution and in the solid state, and shows the potential to link the resultant host-guest adducts into extended solid-state structures. The facile synthesis and ready functionalisation of 2-pyridyl-1,2,3-triazole ligands through copper(I)-catalyzed azide-alkyne cycloaddition (CuAAC) "click" chemistry should allow for ready tuning of the electronic properties of adducts formed from these systems.
分子识别一直是超分子化学家密切关注的领域。所研究的[M(L)]金属配体（M = Pd、Pt，L = 2-(1-(吡啶-4-甲基)-1H-1,2,3-三唑-4-基)吡啶）形成了具有空吡啶基结合位点的平面阳离子板。它们通过π-π和/或亲金属相互作用与平面中性芳香客体相互作用。在某些情况下，金属配体在固态下还通过与侧链吡啶基臂配位或通过金属-金属相互作用与Ag相互作用，形成配位聚合物。因此，我们开发了一种系统，该系统能够在溶液和固态中可靠地识别平面富电子客体，并显示出将所得主客体加合物连接成扩展固态结构的潜力。通过铜(I)催化的叠氮化物-炔烃环加成（CuAAC）“点击”化学对2-吡啶基-1,2,3-三唑配体进行简便合成和易于功能化，应该能够方便地调节由这些系统形成的加合物的电子性质。
