A supramolecular approach for fabrication of photo-responsive block-controllable supramolecular polymers

作者：Liu, Lichao; Rui, Leilei; Gao, Yun; Zhang, Weian^*

来源：Polymer Chemistry, 2014, 5(18): 5453-5460.

DOI：10.1039/c4py00645c

• TRANSFER RADICAL POLYMERIZATION
• CLICK CHEMISTRY
• MOLECULAR RECOGNITION
• SELF-ORGANIZATION
• COMPLEX MATTER
• 2 HOMOPOLYMERS
• COPOLYMERS
• MICELLES
• VESICLES
• POLY(N-ISOPROPYLACRYLAMIDE)

Self-assembly of stimuli-responsive block copolymers in aqueous solution has attracted considerable attention in the past few decades. Herein, we report a supramolecular modular synthetic approach for the fabrication of photo-responsive block-controllable supramolecular polymers (BSPs) based on the assembly of two homopolymers in water. The homopolymers, namely, the polystyrene modified with adamantane and azobenzene as the end groups (Ad-PS-Azo) and poly(ethylene glycol) modified with beta-CD (PEG-beta-CD), were successfully synthesized via atom transfer radical polymerization (ATRP) and click chemistry, respectively. The supramolecular triblock copolymer (STP) was constructed through host-guest interactions between beta-CD and Ad/Azo moieties, and further self-assembled into micelles in aqueous solution, which were investigated by transmission electron microscopy (TEM) and dynamic light scattering (DLS). This well-defined supramolecular triblock copolymer can reversibly disassemble into a supramolecular diblock copolymer (SDP) by alternating irradiation of UV/visible light, which was revealed by TEM, UV-vis and H-1 NMR.

• 出版日期2014
• 单位华东理工大学