Zhang Weijie, Hu Lingling, Zhang He, Pan Chunyue, Tang Juntao
College of Chemistry and Chemical Engineering, Central South University, 932 South Lushan Road, Changsha 410083, China.
Polymers (Basel). 2020 May 8;12(5):1076. doi: 10.3390/polym12051076.
Developing highly efficient catalyst systems for phenol-quinone transformation is of great significance in the chemical/biological industries. Herein, we reported a novel heterogenous catalytic system based on Co(Salphen) supramolecular polymers (CSP), which delivered an excellent catalytic performance in the oxidation of 2,3,6-trimethylphenol (TMP) under mild conditions. The CSP were constructed through a simple self-assembled process between BiCo(Salphen) complex and 4,4-dipyridine. By applying BiCo-BiPy1:1 CSP as the catalyst, 2,3,5-trimethyl-1,4-benzoquinone (TMBQ) could be obtained with an excellent conversion (>99%) and selectivity over 99% under mild reaction conditions (30 °C, 0.1 MPa). In addition, it can be recycled at least five times without substantial decline in catalytic activities (conversion and selectivity), suggesting its excellent stability and recyclability. This work may provide guidance on designing and building valuable catalysts for environmentally friendly and cost-effective oxidation reactions.
开发用于苯酚 - 醌转化的高效催化剂体系在化学/生物工业中具有重要意义。在此，我们报道了一种基于Co(Salphen)超分子聚合物（CSP）的新型多相催化体系，该体系在温和条件下对2,3,6 - 三甲基苯酚（TMP）的氧化反应具有优异的催化性能。CSP是通过BiCo(Salphen)配合物与4,4 - 联吡啶之间简单的自组装过程构建而成。以BiCo - BiPy1:1 CSP作为催化剂，在温和的反应条件（30°C，0.1 MPa）下，可获得转化率>99%且选择性超过99%的2,3,5 - 三甲基 - 1,4 - 苯醌（TMBQ）。此外，它可以循环使用至少五次，催化活性（转化率和选择性）没有大幅下降，表明其具有优异的稳定性和可回收性。这项工作可能为设计和构建用于环境友好且经济高效的氧化反应的有价值催化剂提供指导。
