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Catalytic oxidation of cyclohexane by substituted metalloporphyrins: experimental and molecular simulation

机译:取代金属卟啉催化氧化环己烷:实验性和分子模拟

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摘要

A series of meso-substituted metal tetraphenylporphyrins were synthesized and characterized by UV-vis, FT-IR and elemental analysis. The experimental results show that cobalt tetra(4-nitrophonyl)porphyrin (Co-TNPP) gives better catalytic performance in cyclohexane oxidation. The KA oil (cyclohexanol and cyclohexanone) selectivity is 79.54% at the cyclohexane conversion of 10.43%, and the turnover number reaches to 0.93 x 10(4). Cyclohexane oxidation catalyzed by meso-substituted metalloporphyrins was studied by molecular simulation and experiment. The results of molecular simulation performed by Materials Studio show that the substituted electron-withdrawing groups in the same central metal porphyrins reduce the HOMO and LUMO energies. The metalloporphyrins with lower energy gap have stronger ability to activate the oxygen, the metalloporphyrin intermediates with lower energy gap have stronger ability to activate the cyclohexane.
机译:通过UV-Vis,FT-IR和元素分析合成并表征了一系列替代的金属四苯基卟啉。 实验结果表明,钴四(4-硝基壬基)卟啉(Co-TNPP)在环己烷氧化中具有更好的催化性能。 C环己烷转化率为10.43%的Ka油(环己醇和环己酮)选择性为79.54%,周转数达到0.93×10(4)。 通过分子模拟和实验研究了中奥替代金属卟啉催化的环己烷氧化。 由材料工作室进行的分子模拟结果表明,同一中央金属卟啉中的取代的吸电子基团减少了同性恋和卢比能量。 具有较低能量间隙的金属卟啉具有较强的活化氧气的能力,具有较低能量间隙的金属卟啉中间体具有较强的活化环己烷的能力。

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  • 来源
    《RSC Advances》 |2015年第123期|共6页
  • 作者单位

    Xiangtan Univ Coll Chem Engn Xiangtan 411105 Peoples R China;

    Xiangtan Univ Coll Chem Engn Xiangtan 411105 Peoples R China;

    Xiangtan Univ Coll Chem Engn Xiangtan 411105 Peoples R China;

    Xiangtan Univ Coll Chem Engn Xiangtan 411105 Peoples R China;

    Xiangtan Univ Coll Chem Engn Xiangtan 411105 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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