Inorganic Sulfites: Efficient Reducing Agents and Supplemental Activators for Atom Transfer Radical Polymerization
Inorganic Sulfites: Efficient Reducing Agents and Supplemental Activators for Atom Transfer Radical Polymerization
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DOI：
10.1021/mz300458x
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发表时间：
2012-11-01
影响因子：
7.015
通讯作者：
Coelho, Jorge F. J.
中科院分区：
文献类型：
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作者：
Abreu, Carlos M. R.;Mendonca, Patricia V.;Coelho, Jorge F. J.
研究了二亚硫酸钠（Na2S2O4）、焦亚硫酸钠（Na2S2O5）和亚硫酸氢钠（NaHSO3）等无机亚硫酸盐作为原子转移自由基聚合（ATRP）的还原剂。它们不仅是非常有效的还原剂，而且在室温下还可以作为丙烯酸甲酯在DMSO中的SARA（补充活化剂和还原剂）ATRP的补充活化剂。与Cu(II)Br-2/Me6TREN结合，他们生产出分子量可控、分散性低（M-w/M-n = 1.05）、链端官能团明确的聚丙烯酸甲酯。亚硫酸盐是环保的，被美国食品和药物管理局批准为食品和饮料添加剂，并在许多工业过程中被商业化使用。
Inorganic sulfites such as sodium dithionite (Na2S2O4), sodium metabisulfite (Na2S2O5), and sodium bisulfite (NaHSO3) have been studied as reducing agents for atom transfer radical polymerization (ATRP). They act not only as very efficient reducing agents but also as supplemental activators for SARA (supplemental activator and reducing agent) ATRP of methyl acrylate in DMSO at ambient temperature. In combination with Cu(II)Br-2/Me6TREN, they produced poly(methyl acrylate) with controlled molecular weight, low dispersity (M-w/M-n = 1.05), and well-defined chain-end functionality. Sulfites are eco-friendly, approved by FDA as food and beverage additives, and used commercially in many industrial processes.