Highly emissive perylene diimide-based bowtie-shaped metallacycles  

作　　者：Yali Hou Ruping Shi Hongye Yuan Mingming Zhang 

机构地区：[1]State Key Laboratory for Mechanical Behavior of Materials,Shaanxi International Research Center for Soft Matter,School of Materials Science and Engineering,Xi’an Jiaotong University,Xi’an 710049,China

出　　处：《Chinese Chemical Letters》2023年第4期296-299,共4页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No. 22171219);the Fundamental Research Funds for the Central Universities (No. xzy022021004)。

摘　　要：Metallacycles hold great promise for fluorescence-based sensing due to their synthetic advantages and unique physicochemical properties. However, it remains highly challenging to develop a versatile methodology for constructing highly emissive metallacycles with targeted functionalities and therefore soughtafter properties. Herein, we report a general strategy to construct a series of highly emissive perylene diimide-based metallacycles via the self-assembly of perylene diimide-based tetrapyridyl ligand with different dicarboxylic ligands featuring fixed angles and cis-Pt(PEt_(3))_(2)(OTf)_(2). Single crystal X-ray diffraction analyses verify the formation of bowtie-like metallacycles with two triangular cavities. Notably, the fluorescence quantum yields of most assemblies exceed 98%, amongst the highest values for metallacycles.Additionally, such metallacycles exhibit sensitive fluorescence responses toward picric acid with a detection limit of 2.8 × 10^(-6)mol/L. This study not only provides a rational strategy for preparing highly emissive bowtie-shaped metallacycles, but also sheds light on their usage in the detection of picric acid and associated compounds.

关 键 词：Fluorescence materials Emissive metallacycles SELF-ASSEMBLY Perylene diimide Picric acid sensing 

分 类 号：O657.3[理学—分析化学]