School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore.
Dalton Trans. 2014 Feb 14;43(6):2559-65. doi: 10.1039/c3dt52562g. Epub 2013 Dec 6.
A new hexaprismane Co(II)6(μ3-OH)6 cluster-based three-dimensional coordination polymer ({Co(μ3-OH)(HCOO)0.72(CH3COO)0.28}n, Co6-CP) was successfully synthesized and characterized with single-crystal XRD, IR spectra, TGA spectra and elemental analysis. Co6-CP was used as an effective heterogeneous catalyst for the aerobic epoxidation of various alkenes. For the catalytic epoxidation of trans-stilbene, the conversion and selectivity towards the epoxide reached 98.6 and 98.0%, respectively. Also, an average TOF of 22 h(-1) was obtained for the reaction. The results indicated that Co6-CP displayed excellent aerobic epoxidation activity among the reported coordination polymer materials, even rivaling the traditional heterogeneous cobalt catalysts. The influence of the reaction parameters such as temperature and oxygen flow rate for the epoxidation of the trans-stilbene were also studied in detail.
一种新型六棱柱 Co(II)6(μ3-OH)6 簇基三维配位聚合物({Co(μ3-OH)(HCOO)0.72(CH3COO)0.28}n, Co6-CP)被成功合成并通过单晶 XRD、IR 光谱、TGA 光谱和元素分析进行了表征。Co6-CP 被用作一种有效的多相催化剂，用于各种烯烃的有氧环氧化反应。对于反式肉桂烯的催化环氧化反应，转化率和环氧化产物的选择性分别达到了 98.6%和 98.0%。此外，反应的平均 TOF 达到了 22 h-1。结果表明，Co6-CP 在报道的配位聚合物材料中表现出优异的有氧环氧化活性，甚至可与传统的多相钴催化剂相媲美。还详细研究了反应参数，如温度和氧气流速对反式肉桂烯环氧化反应的影响。
