Reversible Thermally Responsive and Luminescent Coil–Rod–Coil Triblock Copolymers

✍ Scribed by Xing Xiao; Ya-qin Fu; Jian-jun Zhou; Zhi-shan Bo; Lin Li; Chi-Ming Chan

• Book ID: 102495400
• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 177 KB
• Volume: 28
• Category: Article
• ISSN: 1022-1336
• DOI: 10.1002/marc.200700038

✦ Synopsis

Abstract

A functional coil–rod–coil triblock copolymer containing a terfluorene unit as the rigid segment and poly(N‐isopropylacrylamide) (PNIPAAm) as the flexible block was successfully synthesized via reversible addition–fragmentation chain‐transfer (RAFT) polymerization using terfluorene‐based dithioester as the RAFT agent. The temperature‐responsive optical properties were investigated with the aid of dynamic light scattering and fluorescence techniques. Additionally, the relationship between the optical properties and the reversible phase transition of the doping system formed by blending the copolymer with tetraphenylporphine tetrasulfonic acid was studied. Above the lower critical solution temperature, the energy transfer efficiency decreased as a result of the globule–to–coil transition from PNIPAAm segments. The result indicates that these copolymers have a potential to be used as responsive fluorescent probes in facile detection of dye‐labeled biopolymers.

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