期刊
CHEMISTRY-AN ASIAN JOURNAL
卷 15, 期 20, 页码 3370-3378出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/asia.202001041
关键词
low-molecular-weight gelators; hydrazides; chiral recognition; multi-response fluorescence; self-healing
资金
- National Natural Science Foundation of China [21871192]
- Sichuan Science and Technology Program [2018JY0559]
The simpler, the better. A series of simple, neutral and ultralow-molecular-weight (MW: 140-200) hydrazide-derived supramolecular gelators have been designed and synthesized in two straightforward steps. For non-conjugated cyclohexane-derived hydrazides, their monomers can self-assemble to form gels through intermolecular hydrogen bonds and dipole-dipole interactions. Significantly, conjugated phthalhydrazide can self-aggregate into planar and circular trimers through intermolecular hydrogen bonds and then self-assemble to form gels through intermolecular pi-pi stacking interactions. It is interesting that these simple gelators exhibit unusual properties, such as self-healing, multi-response fluorescence, and visual and selective recognition of chiral (R)/(S)-1,1 '-binaphthalene-2,2 '-diamine and S(2-)through much different times of gel re-formation and blue-green color change, respectively. These results underline the importance of supramolecular gels and extend the scope of supramolecular gelators.
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