Building a quadruple stimuli-responsive supramolecular gel based on a supra-amphiphilic metallogelator
作者：Xianhui Chen, Yuanyuan Peng, Xiaobo Tao, Guangyan Du, Quan Li
關鍵字：supra-amphiphilic metallogelator
論文來源：期刊
具體來源：New J. Chem., 2021, 45, 22902-22907
發表時間：2021年
A novel supra-amphiphilic metallogelator [Cu12](OTf)2 having functional dibenzo-24-crown-8 as the hydrophilic part and complexed Cu2+/terpyridine as the hydrophobic part was prepared using an amphiphilic precursor. The supra-amphiphilic metallogelator was found to be able to gel in toluene/ CH3CN or THF/CH3CN. The self-assembly mechanism of [Cu12](OTf)2 into a supramolecular gel was extensively studied by FT-IR, UV–Vis, fluorescence, PXRD spectroscopic techniques, and theoretical calculations, revealing that the intermolecular p–p interaction plays a vital role in the gel formation. Due to the presence of dibenzo-24-crown-8 and a coordinating terpyridine motif within the supraamphiphilic metallogelator, the reversible gel–sol transition can be induced by several stimuli, including temperature, pH, mechanical force, and metal ion/competitive host molecules, making this supramolecular gel highly adaptive to the external environment. The work reported here offers prospects in the design of more metal-based supra-amphiphilic self-assembly building blocks by integrating the functions from both ligands and metal ions, opening new avenues for preparing multiple stimuli-responsive and adaptive materials.