A Synthetic and Multispectroscopic Speciation Analysis of Controlled Radical Polymerization Mediated by Amine–Bis(phenolate)iron Complexes,Macromolecules

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A Synthetic and Multispectroscopic Speciation Analysis of Controlled Radical Polymerization Mediated by Amine–Bis(phenolate)iron Complexes
Macromolecules ( IF 5.1 ) Pub Date : 2015-07-02 00:00:00 , DOI: 10.1021/acs.macromol.5b01175
Hendrik Schroeder , Benjamin R. M. Lake ₁ , Serhiy Demeshko , Michael P. Shaver ₁ , Michael Buback

Affiliation

The mechanism of reversible-deactivation radical polymerization (RDRP) mediated by chloro-substituted amine–bis(phenolate)iron complexes was studied via a combination of Mössbauer, EPR, NMR, and online Vis/NIR spectroscopy. It was found that styrene polymerization operates via an atom-transfer radical polymerization (ATRP) mechanism when alkyl halide is present, whereas an interplay between ATRP and organometallic-mediated radical polymerization (OMRP) equilibria occurs during MMA polymerization. The preparation of the amine–bis(phenolate)iron(II) complex, [O₂NN′]Fe^II, allowed polymerizations to be performed under an OMRP-only regime free of alkyl halide that yields dispersities as low as 1.29 for MMA polymerization.

中文翻译：

胺-双（酚盐）铁配合物介导的可控制的自由基聚合反应的合成和多光谱形态分析

通过结合Mössbauer，EPR，NMR和在线Vis / NIR光谱研究了氯取代的胺-双（酚盐）铁配合物介导的可逆失活自由基聚合（RDRP）的机理。发现存在烷基卤时，苯乙烯聚合通过原子转移自由基聚合（ATRP）机理进行，而在MMA聚合过程中，ATRP与有机金属介导的自由基聚合（OMRP）平衡之间发生相互作用。胺-双（酚盐）铁（II）络合物[O ₂ NN'] Fe ^II的制备使聚合反应在不含烷基卤的仅OMRP方案下进行，对于MMA聚合而言，分散度低至1.29 。

更新日期：2015-07-02

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