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首页> 外文期刊>RSC Advances >Zn 1,3,5-benzenetricarboxylate as an efficient catalyst for the synthesis of cyclic carbonates from?CO2
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Zn 1,3,5-benzenetricarboxylate as an efficient catalyst for the synthesis of cyclic carbonates from?CO2

机译：1,3,5-苯三羧酸锌是从？CO2合成环状碳酸酯的有效催化剂

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Development of heterogeneous catalysts for the cycloaddition of CO _(2) with epoxides to produce cyclic carbonates is a hot issue in the field of chemical fixation of carbon dioxide. It is fairly promising as production of by-products is quite low. In this study, the [Zn _(3) (BTC) _(2) ]/ n -Bu _(4) NBr catalytic system was investigated for the solventless cycloaddition of carbon dioxide with epoxides and had an excellent synergetic effect in promoting the reaction. The reaction parameters were moderate i.e. (130 °C and 13 bar CO _(2) pressure) and were selected by a study of the catalytic system. Under the optimal reaction conditions, the yield of cyclic carbonate reached 99%. A decrease in the yield of cyclic carbonate was not apparent after [Zn _(3) (BTC) _(2) ] was reused three times, indicating that [Zn _(3) (BTC) _(2) ] was stable. At the same time, the catalytic activity of the catalyst for other epoxides was also verified. The acidic and alkaline nature of the [Zn _(3) (BTC) _(2) ] catalyst did not change obviously after recycling the catalyst three times. In this study it is also verified that the [Zn _(3) (BTC) _(2) ] catalytic cycloaddition reaction was closely related to the Lewis acid/base distribution. In addition, a plausible mechanism for the synergistic effect of the catalyst (Lewis acid and base properties) and the co-catalyst was suggested.
机译：在二氧化碳的化学固定领域，开发用于环氧化物将CO_（2）与环氧化物加成以生成环状碳酸酯的非均相催化剂是一个热门问题。这是相当有前途的，因为副产品的产量很低。在这项研究中，研究了[Zn _（3）（BTC）_（2）] / n -Bu _（4）NBr催化体系对二氧化碳与环氧化物的无溶剂环加成反应，并具有良好的协同作用，促进了反应。反应参数是中等的，即（130℃和13bar CO _（2）压力），并且是通过研究催化体系来选择的。在最佳反应条件下，环状碳酸酯的收率达到99％。在重复使用[Zn _（3）（BTC）_（2）3次后，环状碳酸酯的收率没有明显下降，表明[Zn _（3）（BTC）_（2）是稳定的。同时，还证实了该催化剂对其他环氧化物的催化活性。 [Zn _（3）（BTC）_（2）]催化剂循环使用3次后，其酸碱性质没有明显变化。在这项研究中，还证实了[Zn _（3）（BTC）_（2）]催化环加成反应与路易斯酸/碱分布密切相关。此外，有人提出了一种合理的机理，可以提高催化剂（路易斯酸和碱性质）与助催化剂的协同作用。

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