Chen Wanmin, Tang Xiaoliang, Dou Wei, Wang Bei, Guo Lirong, Ju Zhenghua, Liu Weisheng
Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province and State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China.
Chemistry. 2017 Jul 21;23(41):9804-9811. doi: 10.1002/chem.201700827. Epub 2017 Jun 7.
A series of unique homochiral lanthanide tetranuclear quadruple-stranded helicates have been self-assembled controllably by using the intrinsic advantages of chiral bridging ligands, (S)-H L and (R)-H L, and lanthanide ions with high coordination numbers. The self-assembly process of these chiral helicates not only ensures the structural stability and quadruple-stranded feature of lanthanide cluster in the solid state and solution, but also achieves effective transfer and amplification of the chirality code from the ligand to a higher supramolecular level. Moreover, through using optical rotation, circular dichroism spectra analysis, and luminescence measurements, we demonstrate that these chiral lanthanide helicates could serve as sensitive and multi-responsive sensors to recognize and detect F anions based on the change of chiral signal and NIR luminescence simultaneously, which represents a meaningful exploration for developing functional lanthanide-based polynuclear clusters.
通过利用手性桥连配体（S）-HL和（R）-HL以及高配位数镧系离子的固有优势，一系列独特的同手性镧系四核四重螺旋配合物已被可控地自组装。这些手性螺旋配合物的自组装过程不仅确保了镧系簇在固态和溶液中的结构稳定性和四重链特征，还实现了手性编码从配体到更高超分子水平的有效转移和放大。此外，通过旋光、圆二色光谱分析和发光测量，我们证明这些手性镧系螺旋配合物可以作为灵敏且多响应的传感器，基于手性信号和近红外发光的变化同时识别和检测氟阴离子，这代表了开发基于镧系的多核簇合物功能的有意义探索。
