Zhao Yuan-Yuan, Li Zhong-Qiu, Gong Zhong-Liang, Bernhard Stefan, Zhong Yu-Wu
Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China.
Chemistry. 2024 May 17;30(28):e202400685. doi: 10.1002/chem.202400685. Epub 2024 Apr 5.
Recently, chiral metal-organic coordination materials have emerged as promising candidates for a wide range of applications in chiroptoelectronics, chiral catalysis, and information encryption, etc. Notably, the chiroptical effect of coordination chromophores makes them appealing for applications such as photodetectors, OLEDs, 3D displays, and bioimaging. The direct synthesis of chiral coordination materials using chiral organic ligands or complexes with metal-centered chirality is very often tedious and costly. In the case of ionic coordination materials, the combination of chiral anions with cationic, achiral coordination compounds through noncovalent interactions may endow molecular materials with desirable chiroptical properties. The use of such a simple chiral strategy has been proven effective in inducing promising circular dichroism and/or circularly polarized luminescence signals. This concept article mainly delves into the latest advances in exploring the efficacy of such a chiral anion strategy for transforming achiral coordination materials into chromophores with superb photo- or electro-chiroptical properties. In particular, ionic small-molecular metal complexes, metal clusters, coordination supramolecular assemblies, and metal-organic frameworks containing chiral anions are discussed. A perspective on the future opportunities on the preparation of chiroptical materials with the chiral anion strategy is also presented.
最近,手性金属有机配位材料已成为在手性光电子学、手性催化和信息加密等广泛应用中很有前景的候选材料。值得注意的是,配位发色团的手性光学效应使其在光电探测器、有机发光二极管、3D显示器和生物成像等应用中颇具吸引力。使用手性有机配体或具有金属中心手性的配合物直接合成手性配位材料通常既繁琐又昂贵。对于离子配位材料,手性阴离子通过非共价相互作用与阳离子非手性配位化合物结合,可能会赋予分子材料所需的手性光学性质。已证明使用这种简单的手性策略可有效诱导出有前景的圆二色性和/或圆偏振发光信号。这篇概念文章主要探讨了探索这种手性阴离子策略将非手性配位材料转化为具有优异光或电手性光学性质的发色团的功效方面的最新进展。特别讨论了含有手性阴离子的离子小分子金属配合物、金属簇、配位超分子组装体和金属有机框架。还对手性阴离子策略制备手性光学材料的未来机遇提出了展望。