作者:Michal Juríček、Marco Felici、Pablo Contreras-Carballada、Ján Lauko、Sandra Rodríguez Bou、Paul H. J. Kouwer、Albert M. Brouwer、Alan E. Rowan
DOI:10.1039/c0jm03117h
日期:——
We describe a novel modular approach to a series of luminescent iridium complexes bearing triazoleâpyridine-derived ligands that were conveniently prepared by using âclickâ chemistry. One, two or three triazoleâpyridine units were effectively built into the heteroaromatic macromolecule using versatile acetylene- and azide-functionalised precursors. Using this approach, a series of iridium-derived molecules, that differ in the number of iridium centres, the structural characteristics of the cyclometalating ligand and the backbone, were synthesised. The preliminary photophysical properties of the prepared complexes indicate that there is only limited interaction (through space or through the backbone) between the iridium centres within one molecule and that each iridium centre retains its individual properties. The results show that our approach can be generally applied towards covalently linked multichromophoric systems with potential application, for instance, in the design and preparation of tunable light emitters. As a demonstration of this concept, a single molecule white-light emitter, constructed from two iridium centres (yellow emission) and a fluorene unit (blue emission), is presented.
我们描述了一种新颖的模块化方法,用于一系列具有三唑-吡啶衍生配体的发光铱复合物,这些配体通过“点击”化学方便地制备而成。有效地将一个、两个或三个三唑-吡啶单元构建到异芳香性大分子中,使用了多功能的乙炔和叠氮前体。利用这种方法,我们合成了一系列铱衍生分子,这些分子在铱中心的数量、环配体的结构特征以及主链上存在差异。所制备复合物的初步光物理特性表明,单个分子内铱中心之间的相互作用(通过空间或主链)是有限的,每个铱中心保持其个体特性。结果表明,我们的方法可以普遍应用于共价连接的多色系统,具有潜在应用,例如在可调光发射体的设计和制备中。作为这一概念的示范,展示了一种由两个铱中心(黄色发射)和一个氟烯单元(蓝色发射)构建的单分子白光发射器。