Abstract
A telechelic rhodamine-bearing poly(2-isopropyl-2-oxazoline) (Rh-PiPrOx-Rh) was prepared through the living cationic ring-opening polymerization of 2-isopropyl-2-oxazoline and successive end-group functionalization using amine-functionalized rhodamine 6G. Rh-PiPrOx-Rh exhibited hydrophilic–hydrophobic phase transition behavior at a lower critical solution temperature. The rhodamine moieties exhibited pH-responsive and Al3+-sensitive absorption and emission changes. Under physiological conditions, the amphiphilic Rh-PiPrOx-Rh showed the formation of polymeric micelle (critical micellar concentration: 0.042 g/L) that could be dissociated by binding with Al3+. The thermo-responsive properties of Rh-PiPrOx-Rh was also significantly changed by Al3+ addition.
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