Adsorption of anionic dyes from water by thermostable supramolecular hydrogel. Issue 9 (2nd October 2016)

• Record Type: Journal Article
• Authors: Chen, Xu-Man; Zhang, Ying-Ming; Liu, Yu
• Is Part Of: Supramolecular chemistry. Volume 28:Issue 9/10(2016)
• Page Start: 817
• Page End: 824
• Publication Date: 2016-10-02
• Subjects: Supramolecular hydrogel -- stimuli-responsiveness -- cucurbituril -- tetraphenylethylene; Macromolecules -- Periodicals; Supramolecular chemistry -- Periodicals; 547.005
• DOI: 10.1080/10610278.2016.1158406
• Languages: English
• ISSNs: 1061-0278

Abstract

Abstract: A supramolecular hydrogel was successfully constructed by the noncovalent association of cucurbit[8]uril (CB[8]) with a tetraphenylethylene (TPE) derivative bearing four monocharged viologens (TPE-4Q). Due to the attractive photophysical behaviours of TPE and its rigid complexation with CB[8], the obtained hydrogel emits bright orange fluorescence and is highly thermostable even at 200 °C. Rheological analyses and microscopic investigations jointly confirm that the supramolecular hydrogel possesses good rheological properties and well-organised lamellar structures. Significantly, the assembly/disassembly process of this supramolecular hydrogel can be efficiently modulated by several external stimuli, including pH, mechanical force and competitive guests. Moreover, as investigated by UV/Vis and fluorescence titrations, this two-dimensional self-assembly can specifically adsorb π -conjugated anionic dyes in water with high adsorption efficiency, mainly through the π -stacking interaction with TPE backbones and the electrostatic interaction with monocharged viologen sites. Abstract :