Efficient cyclic carbonate synthesis catalyzed by zinc cluster systems under mild conditions
Efficient cyclic carbonate synthesis catalyzed by zinc cluster systems under mild conditions
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DOI：
10.1039/c1cy00404b
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发表时间：
2012-03
影响因子：
5
通讯作者：
Yi Yang;Y. Hayashi;Y. Fujii;Takuto Nagano;Yusuke Kita;T. Ohshima;J. Okuda;K. Mashima
中科院分区：
文献类型：
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作者：
Yi Yang;Y. Hayashi;Y. Fujii;Takuto Nagano;Yusuke Kita;T. Ohshima;J. Okuda;K. Mashima
开发了一种由锌簇和四丁基碘化铵（TBAI）组成的高效催化体系，用于在非常温和的条件下（25°C, 1atm），甚至在水和空气等杂质存在的情况下，由环氧化物和二氧化碳（CO2）合成环状碳酸盐，而不使用任何有机溶剂。中心Zn（II）离子的亲电性、三氟甲基数目、烷基铵盐阴离子的亲核性和离开能力以及各种反应参数对双功能催化剂的催化活性有很大影响。因此，这种无溶剂工艺是将二氧化碳催化转化为增值化学品的环境友好范例，也有可能有助于减少燃烧化石燃料产生的大气二氧化碳排放。
An efficient catalytic system of a zinc cluster and tetrabutylammonium iodide (TBAI) was developed for cyclic carbonate synthesis from epoxides and carbon dioxide (CO2) without the use of any organic solvents under very mild conditions (25 °C, 1 atm), even in the presence of impurities such as water and air. Electrophilicity of the central Zn(II) ion, the number of trifluoromethyl groups, nucleophilicity and leaving ability of the anion of alkylammonium salts, and various reaction parameters have a great effect on the catalytic activity of the bifunctional catalyst. Therefore, this solvent-free process represents an environmentally friendly example for the catalytic conversion of CO2 into value-added chemicals and also has the potential to contribute towards decreasing atmospheric CO2 emission from the burning of fossil fuels.