离子液体中可见光加速的光引发转移终止剂聚合反应
Visible Light-Accelerated Photoiniferter Polymerization in Ionic Liquid.
作者信息
Santha Kumar Arunjunai R S, Allison-Logan Stephanie, Finnegan John R, Singha Nikhil K, Ashokkumar Muthupandian, Qiao Greg
机构信息
Rubber Technology Center, Indian Institute of Technology Kharagpur, 721302, WB, India.
School of Chemistry, The University of Melbourne, Melbourne 3010, Australia.
出版信息
ACS Macro Lett. 2023 Aug 15;12(8):1012-1018. doi: 10.1021/acsmacrolett.3c00329. Epub 2023 Jul 10.
The effect of ionic liquids on the reversible addition-fragmentation chain transfer (RAFT) polymerization mediated by a visible-light-induced photoiniferter mechanism was investigated. ,-Dimethyl acrylamide was polymerized by photoiniferter polymerization in 1-ethyl-3-methylimidazolium ethylsulfate [EMIM][EtSO] ionic liquid. We observed a considerable increase in the polymerization rate constants in ionic liquids (ILs), as well as in the mixed solvent of water and the IL, compared to those observed with water alone as the solvent. To demonstrate the robustness of the process, block copolymers with varying block ratios were synthesized with precise control over their molecular weight and mass dispersity (). The very high chain-end fidelity provided by the photoiniferter polymerization in IL was described by using MALDI-ToF MS analysis.
研究了离子液体对由可见光诱导的光引发转移终止剂（photoiniferter）机理介导的可逆加成-断裂链转移（RAFT）聚合反应的影响。在1-乙基-3-甲基咪唑硫酸乙酯[EMIM][EtSO]离子液体中，通过光引发转移终止剂聚合反应使N,N-二甲基丙烯酰胺发生聚合。我们观察到，与仅以水作为溶剂相比，在离子液体（ILs）以及水与离子液体的混合溶剂中，聚合反应速率常数有显著增加。为了证明该过程的稳健性，合成了具有不同嵌段比的嵌段共聚物，并对其分子量和质量分散度（）进行了精确控制。通过基质辅助激光解吸电离飞行时间质谱（MALDI-ToF MS）分析，描述了离子液体中光引发转移终止剂聚合反应所提供的非常高的链端保真度。
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