期刊
SCIENCE ADVANCES
卷 6, 期 2, 页码 -出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.aax9976
关键词
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资金
- National Key R&D Program of China [2017YFA0700104]
- National Natural Science Foundation of China [21931007, 21861001]
- 111 Project of China [D17003]
Revealing the contribution of pi-pi stacking interactions in supramolecular assembly is important for understanding the intrinsic nature of molecular assembly fundamentally. However, because they are much weaker than covalent bonds pi-pi stacking interactions are usually ignored in the construction of porous materials. Obtaining stable porous materials that are only dependent on pi-pi stacking interactions, despite being very challenging, could address this concern. Here, we present a porous supramolecular framework (pi-1) stabilized only by intermolecular pi-pi stacking interactions. pi-1 shows good thermal and chemical stability not only in various organic solvents but also in aqueous solution in a broad pH range. Furthermore, featuring one-dimensional channels with dangling thiolate groups, pi-1 exhibits excellent Hg2+ removal performance, with adsorption capacity as high as 786.67 mg g(-1) and an adsorption ratio as high as 99.998%. In addition, pi-1 also shows high adsorption selectivity to Hg2+ in the presence of a series of interfering ions.
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