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- W820141264 abstract "Abstract This paper describes the synthesis of a terpyridine-containing diblock copolymer, poly(N-vinylcarbazole)- block -poly[4′-((4-vinylphenyl) phenyl)-2,2′:6′,2″- terpyridine] (poly(VK 15 - b -TPY 4 )), using the macro-chain transfer agent VK macro-CTA, and employing two-step reverse addition-fragmentation transfer (RAFT) polymerization. We examined the effect of terpyridine units on sensory characteristics of fluorescent chemosensors. VK macro-CTA and diblock copolymer poly(VK 15 - b -TPY 4 ) both exhibited moderate thermal stability, with thermal decomposition temperatures of 5% weight losses at approximately 307 °C and 378 °C, respectively, suggesting that the enhancement of thermal stability was attributed to the incorporation of terpyridine segments into the block copolymer. Poly(VK 15 - b -TPY 4 ) exhibited higher sensitivities to Ni 2 + and Mn 2 + ions, with Stern–Volmer constants ( K sv ) of 2.58 × 10 5 M − 1 and 2.57 × 10 5 M − 1 , respectively. Adding a Zn 2 + ion not only caused partial fluorescence enhancement (3.2-fold quantum efficiency) but also induced a bathochromic shift of emission peak by approximately 56 nm (from 429 nm to 485 nm), indicating that the Zn 2 + -terpyridine complex reduced the twist and vibration of the C–C polymer backbone and enhanced the charge transfer from donors to acceptors because of the more planar and rigid structure. Our results suggest that poly(VK 15 - b -TPY 4 ) is a promising material for chemosensory applications." @default.
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- W820141264 date "2015-08-01" @default.
- W820141264 modified "2023-10-14" @default.
- W820141264 title "Synthesis and chemosensory properties of terpyridine-containing diblock polycarbazole through RAFT polymerization" @default.
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- W820141264 doi "https://doi.org/10.1016/j.reactfunctpolym.2015.06.008" @default.
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