Catalytic Defluorination of Perfluorinated Aromatics under Oxidative Conditions Using N-Bridged Diiron Phthalocyanine
作者:Cédric Colomban、Evgenij V. Kudrik、Pavel Afanasiev、Alexander B. Sorokin
DOI:10.1021/ja505437h
日期:2014.8.13
[(Pc)(F)Fe(IV)(μ-N)Fe(IV)(F)(Pc(+•))], which was isolated and characterized by UV-vis, EPR, (19)F NMR, Fe K-edge EXAFS, XANES, and Kβ X-ray emission spectroscopy, ESI-MS, and electrochemical techniques. A wide range of per- and polyfluorinated aromatics (21 examples), including C6F6, C6F5CF3, C6F5CN, and C6F5NO2, were defluorinated with high conversions and high turnover numbers. [(Pc)Fe(III)(μ-N)Fe(IV)(Pc)]
碳氟键是有机化学中最强的单键,这使得通常与有机金属和还原方法相关的活化和裂解特别困难。我们在此描述了在温和条件下(氢)催化的多氟和全氟芳烃的有效脱氟,由 μ-硝基二铁酞菁配合物 [(Pc)Fe(III)(μ-N)Fe(IV)(Pc)] 催化。过氧化物作为氧化剂,接近环境温度)。该反应通过与氟化物轴向配体 [(Pc)(F)Fe(IV)(μ-N)Fe(IV)(F)(Pc(+•) )],通过 UV-vis、EPR、(19)F NMR、Fe K-edge EXAFS、XANES 和 Kβ X 射线发射光谱、ESI-MS 和电化学技术对其进行分离和表征。包括 C6F6、C6F5CF3、C6F5CN 和 C6F5NO2 在内的各种全氟和多氟芳烃(21 个例子)都以高转化率和高转化率脱氟。固定在碳载体上的 [(Pc)Fe(III)(μ-N)Fe(IV)(Pc)] 在水中的非均相脱氟中显示出更高的催化活性,每个催化剂分子提供高达