多核稀土簇合物对钾离子选择性识别的研究

Recently, synthetic strategies for constructing functional lanthanide clusters with various structures and novel inclusion properties have been well established. The binding activity of the multinuclear lanthanide complexes towards guest is many times larger than that of the corresponding mononuclear complex, and a consequently good signal response from multinuclear one is far larger than that observed for mononuclear one; on the other hand, the association between multiple nuclear enables the diversified signal output, therefore there are a variety of detection methods, such as: luminescent, UV/Vis, near-IR, magnetism, optical rotation, electrochemistry, and so on. A series of lanthanide nanocages will be achieved for size selectively detection of potassium, moreover, the potassium will template the special formation, suggesting a selective recognition of potassium by multinuclear lanthanide clusters. This project will further study how to build a prospective multinuclear lanthanide supramolecular system by rational designing of ligand, and research the template of potassium during the self-assembly process, as well as the selective recognition of potassium ions by multinuclear lanthanide clusters, providing the novel examples for recognizing the potassium ions.

近年来，构筑结构新颖、性能优良的多核稀土超分子簇合物成为研究热点。多核稀土配合物体系由于金属离子敏化中心增加，其信号输出是单核配合物的多倍；此外，多个金属核之间的协同作用，使其具有荧光、紫外、近红外发光、磁性、旋光、电化学等多信号输出、表征手段多样的优点。我们拟设计合成一系列多齿酰胺类配体，构筑出空腔与钾离子匹配的多核稀土超分子配合物，另外尝试利用钾离子的模板效应诱导得到特殊构型的多核配合物，以实现对钾离子的选择性识别。本项目将进一步探究如何通过巧妙设计配体得到构型新颖、尺度可控的多核稀土超分子簇，深入研究钾离子在该自组装过程中的模板作用，以及多核稀土超分子簇对钾离子的选择性识别，为发掘新颖、高效、实用的检测钾离子稀土功能材料提供新的设计思路和新的检测方法。