Department of Chemistry, University of Basel, BPR 1096, Mattenstrasse 24A, 4058 Basel, Switzerland.
Chem Commun (Camb). 2020 Sep 17;56(74):10786-10794. doi: 10.1039/d0cc04477f.
The first 4,2':6',4''-terpyridine (4,2':6',4''-tpy) containing coordination polymer was reported over 20 years ago and in the last decade, there has been increased interest in the use of ditopic 4,2':6',4''-tpy ligands as linkers in coordination polymers and 2D-networks. Functionalization in the 4'-position of 4,2':6',4''-tpy is synthetically straightforward, giving access to a large suite of building blocks. Less well explored is the coordination chemistry of 3,2':6',3''-tpy ligands which exhibit greater conformational flexibility than 4,2':6',4''-tpy. One approach to making the transition from 2D- to 3D-networks is to utilize tetratopic bis(4,2':6',4''-tpy) and bis(3,2':6',3''-tpy) ligands which act as 4-connecting nodes. In this highlight, we survey recent progress towards a better understanding of the design principles associated with the use of ditopic and tetratopic 4,2':6',4''-tpy and 3,2':6',3''-tpy containing ligands and their roles both as linkers and nodes in coordination assemblies.
20 多年前就报道了首例含有三联吡啶（4,2':6',4''-tpy）的配位聚合物，在过去的十年中，人们对使用双齿 4,2':6',4''-tpy 配体作为配位聚合物和 2D 网络中的连接体的兴趣日益增加。在 4,2':6',4''-tpy 的 4'-位进行功能化在合成上非常简单，可获得大量的构建块。而 3,2':6',3''-tpy 配体的配位化学研究较少，其构象灵活性比 4,2':6',4''-tpy 更大。从 2D 网络向 3D 网络转变的一种方法是使用四齿双（4,2':6',4''-tpy）和双（3,2':6',3''-tpy）配体，它们作为 4 连接节点。在这篇重点介绍中，我们综述了近年来在更好地理解使用双齿和四齿 4,2':6',4''-tpy 和 3,2':6',3''-tpy 配体的设计原则方面取得的进展，以及它们作为配位组装体中的连接体和节点的作用。
