Citation: Yu Jiang, Nikos Hadjichristidis. pH-responsive AIE-active Polyethylene-based Block Copolymers[J]. Chinese Journal of Polymer Science, ;2019, 37(9): 930-935. doi: 10.1007/s10118-019-2330-0 shu

pH-responsive AIE-active Polyethylene-based Block Copolymers

Yu Jiang ,
Nikos Hadjichristidis ^,

Physical Sciences and Engineering Division, KAUST Catalysis Center, Polymer Synthesis Laboratory, King Abdullah University of Science and Technology (KAUST), Thuwal 23955, Saudi Arabia

Corresponding author: Nikos Hadjichristidis, nikolaos.hadjichristidis@kaust.edu.sa
Received Date: 29 June 2019
Revised Date: 11 July 2019
Available Online: 24 July 2019

A novel synthetic strategy towards pH-responsive aggregation-induced emission (AIE)-active tetraphenylethene (TPE)-functionalized polyethylene-based block copolymers is presented. Tris(3-(4-(1,2,2-triphenylvinyl)phenoxy)propyl)borane was used to initiate the polyhomologation of dimethylsulfoxonium methylide to afford well-defined α-TPE-ω-OH linear polyethylenes (PE). The terminal hydroxyl groups were transformed to atom transfer radical polymerization (ATRP) initiating sites by esterification with α-bromoisobutyryl bromide, followed by polymerization of tert-butyl acrylate (tBA) to provide TPE-PE-b-PtBA block copolymers. After hydrolysis of the tBu group to COOH group, the corresponding pH-responsive TPE-PE-b-PAA block copolymers were obtained. All synthesized block copolymers revealed AIE behavior either in solution or bulk. Due to the pH-responsivity of PAA chains, the aggregation state at different pH and consequently the fluorescence intensity changed. Also, the synthesized block copolymers exhibited ion-specificity fluorescence properties.
- Polyhomologation,
- ATRP,
- Polyethylene-b-poly(acrylic acid),
- AIE,
- pH-responsivity,
- Ion-specificity
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