Multimodal stimuli-responsive heterotelechelic poly(2-isopropyl-2-oxazoline) (TPE-PiPrOx-R6G) bearing tetraphenylethene (TPE) and rhodamine 6G (R6G) at the α and ω terminals, respectively, was synthesized.TPE-PiPrOx-R6Gformed supramolecular polymeric micelles in aqueous solution with a critical micelle concentration of 0.19 g·L-1. Upon excitation at 310 nm, an aqueous solution ofTPE-PiPrOx-R6G(1.00 g·L-1) exhibited a strong fluorescence emission at approximately 480 and 550 nm, which originated from the aggregation-induced emission of the TPE units and Förster resonance energy transfer from TPE to R6G, respectively. The aforementioned solution showed a phase transition behavior at 30 °C, and its fluorescence emission changed upon heating due to the phase transition ofTPE-PiPrOx-R6G. Upon addition of γ-cyclodextrin (γ-CD), the cloud point temperature increased to 40 °C. Furthermore, the fluorescence emission ofTPE-PiPrOx-R6Gdecreased due to the dissociation of the TPE units following their inclusion into γ-CD.
|Number of pages||8|
|Journal||ACS Applied Polymer Materials|
|Publication status||Published - 2020 Aug 14|
Bibliographical noteFunding Information:
This work was supported by the Mid-Career Researcher Program (2017R1A2A1A17069537 and 2020R1A2C3004520) funded by the National Research Foundation (NRF) of Korea and Postdoc Researcher Supporting Program (project no. 2020-12-0026) funded by Yonsei University.
Copyright © 2020 American Chemical Society
All Science Journal Classification (ASJC) codes
- Polymers and Plastics
- Process Chemistry and Technology
- Organic Chemistry