The Al^III(tralen)Cl complex (tralenH₂ = N,N′-di(cyclohepta-2,4,6-trien-1-one-2-yl)-1,2-diaminobenzene) has been synthesized and applied to mediate the reversible-deactivation radical polymerization (RDRP) of vinyl monomers. The polymerization of unconjugated monomers such as vinyl acetate (VAc) and N-vinylpyrrolidone (NVP) with Al^III(tralen)Cl showed the living characters of linearly increased molecular weight with conversion and formation of block copolymer. However, the control manners in the polymerization of conjugated monomers like acrylates and styrene were limited. The electron paramagnetic resonance (EPR) spectrum indicated that Al^III(tralen)BArF (BArF = tetrakis(3,5-trifluormethylphenyl)borate) and propagating radicals formed a paramagnetic dormant species, possibly PVAc-Al^III(tralen)BArF, via the single-electron transfer to the tralen ligand.

中文翻译：

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铝Tralen复合物介导的醋酸乙烯酯的可逆失活自由基聚合

合成了Al ^III（tralen）Cl络合物（tralenH ₂ = N，N'-二（环庚2,4,6-三烯-1-一-2-基）-1,2-二氨基苯）介导乙烯基单体的可逆失活自由基聚合（RDRP）。非共轭单体（例如醋酸乙烯酯（VAc）和N-乙烯基吡咯烷酮（N VP））与Al ^III（链烯）Cl的聚合反应显示出随着转化和嵌段共聚物的形成，分子量线性增加的活性特征。然而，共轭单体如丙烯酸酯和苯乙烯的聚合反应的控制方式受到限制。电子顺磁共振（EPR）谱表明Al ^III（tralen）BArF（BArF =四（3,5-三氟甲基苯基）硼酸酯）和传播的自由基通过单电子转移至tralen配体形成顺磁性休眠物质，可能是PVAc-Al ^III（tralen）BArF。