An efficient atom-economical chemoselective CO2 cycloaddition using lanthanum oxide/tetrabutyl ammonium bromide†,Sustainable Energy & Fuels

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An efficient atom-economical chemoselective CO2 cycloaddition using lanthanum oxide/tetrabutyl ammonium bromide†
Sustainable Energy & Fuels ( IF 5.0 ) Pub Date : 2018-04-06 00:00:00 , DOI: 10.1039/c8se00092a
Abdussalam K. Qaroush _{1,

2,

3,

4,

5} , Fatima A. Alsoubani _{1,

5,

6,

7} , Ala'a M. Al-Khateeb _{1,

5,

6,

7} , Enas Nabih _{1,

5,

6,

7} , Esraa Al-Ramahi _{1,

5,

6,

7} , Mohammad F. Khanfar _{5,

8,

9,

10} , Khaleel I. Assaf _{11,

12,

13,

14} , Ala'a F. Eftaiha _{1,

5,

6,

7}

Affiliation

The cycloaddition reaction between carbon dioxide (CO₂) and epoxides is an attractive example for the synthesis of value-added chemicals exploiting CO₂ greenhouse emissions gas. In this study, we reported on propylene carbonate (PC) production mediated by a lanthanum oxide (La–O)/tetrabutyl ammonium bromide (TBAB) binary mixture. The effect of different reaction parameters including catalyst/co-catalyst loading, the amount of substrate, CO₂ pressure, temperature, and reaction time was investigated. The binary catalytic system showed high catalytic conversion and selectivity. Catalyst reusability experiments indicated that the binary system was recyclable over five times without losing its activity/selectivity. In addition, a plausible reaction mechanism based on spectroscopic and kinetic measurements was presented, which was supported by density functional theory (DFT) calculations.

中文翻译：

使用氧化镧/四丁基溴化铵的有效的原子经济的化学选择性CO ₂环加成反应†

二氧化碳（CO ₂）与环氧化物之间的环加成反应是利用CO ₂温室气体排放的增值化学品合成的一个引人注目的例子。在这项研究中，我们报道了由氧化镧（La-O）/四丁基溴化铵（TBAB）二元混合物介导的碳酸亚丙酯（PC）的生产。不同反应参数的影响，包括催化剂/助催化剂负载量，底物量，CO ₂研究了压力，温度和反应时间。二元催化体系显示出高的催化转化率和选择性。催化剂可重用性实验表明，该二元体系可循环使用五次，而不会丧失其活性/选择性。此外，提出了一种基于光谱和动力学测量的合理反应机理，并得到密度泛函理论（DFT）计算的支持。

更新日期：2018-04-06

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