Beilstein J. Org. Chem.2019,15, 437–444, doi:10.3762/bjoc.15.38
-crown-7, B21C7s) can effectively control the thermo-responsive properties.
Keywords: crown ethers; hydrophobic units; lower critical solution temperature; LCST; thermo-responsiveness; supramolecular chemistry; Introduction
The introduction of stimuli-responsiveness into artificial materials is vital
behavior, is a type of thermo-responsiveness [14][15][16], which has gained much attention in supramolecular chemistry, because of its profound impact on the development of stimuli-sensitive supramolecular materials with controllable and/or programmable phase separation properties [17][18][19].
Though LCST
previous work, we have found that benzo-21-crown-7 (B21C7) and its derivatives exhibit typical LCST behavior in water, and that different substituted groups exert a great influence on the thermo-responsiveness [39]. However, highly concentrated solutions (>120 mg/mL) of B21C7s and elevated temperatures
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Graphical Abstract
Scheme 1:
Chemical structures of 3a–e and 5a–e, and the cartoon representation of LCST behavior.