纳米片
催化作用
基质(水族馆)
环己烯
氧化环己烯
溶剂
产量(工程)
氧化物
离子液体
分解
苯乙烯氧化物
化学工程
化学
苯乙烯
材料科学
共聚物
有机化学
工程类
冶金
聚合物
地质学
海洋学
作者
Wensheng Mao,Xiao Zi-sheng,Longhao Li,Jinling Li,Hongmei Huang,Yi Xiao,Jingkuan Song,Zaihui Fu,Liang Mao,Daqiang Yin
标识
DOI:10.1016/j.mcat.2022.112901
摘要
A series of ultrathin (∼1.11–4.80 nm) 2D porphyrinic MOF nanosheets are developed and novel synergistic systems are conveniently constructed for the facile formation of cyclic carbonates. Using n-Bu4NBr (TBAB) as a co-catalyst, ultrathin (ca. 2.58 nm) Co-TCPP exhibited high catalytic activity for the solvent-free conversion of styrene oxide to cyclic carbonate, affording 99% yield at ambient conditions (25 °C and 1 atm CO2). A relatively low energy (19.6 kcal/mol) for the rate-determining step is required for Co-TCPP/TBAB nanosystem as calculated by DFT. Notably, utilizing amino acid ionic liquid (AAIL, [Bmim][Glu] or [Bmim][His]) as the modifier, a substrate-dependent protocol was proposed to fix CO2 with terminal epoxides or cyclohexene oxide, giving cyclic carbonates in 84–99% yields under mild conditions (solvent-free, 80 °C and 1 atm CO2). 13C NMR and UV-vis studies provided insights into the vital roles of AAIL during CO2 capture via carbamate dianion and in situ fabrication of Co-TCPP-AAIL. Moreover, DFT calculations also confirmed the AAIL-regulated substrate-dependent transformation strategy.
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