Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 142, Issue 1, Pages 448-455Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacs.9b11290
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Funding
- National Natural Science Foundation of China [21704024]
- Huxiang Young Talent Program from Hunan Province [2018RS3036]
- Fundamental Research Funds for the Central Universities from Hunan University
- 1000 Talents Award of Shaan'xi Province [334041900005]
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Although the gelation process and lower critical solution temperature (LCST) behavior are well acknowledged in polymer systems, low-molecular-weight gelators (LMWGs) rarely display LCST behavior during supramolecular gelation. Herein, we report an LMWG system with LCST-type thermoresponsiveness and an LCST-triggered supramolecular gelation process. Temperature plays a crucial role in this system, not only affecting the LCST phase separation but also triggering the gelation process. The backbones (three-dimensional structures) of the resulting hydrogel are the hierarchical assemblies of the LMWG undergoing the LCST phase separation. Hence, the gelation of the LMWG is only realized when the gelation temperature is above the critical transition temperature (T-cloud) of the LCST behavior, which is different from many supramolecular or polymeric hydrogel systems.
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