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Incorporation of Functional Groups in Porphyrinic Metal‐Organic Frameworks by Post‐modification for Highly Efficient Oxidation Catalysis
ChemCatChem ( IF 4.5 ) Pub Date : 2020-05-18 , DOI: 10.1002/cctc.202000295
Jinhua Ji 1 , Fan Liu 1 , Weijun Yang 1, 2 , Mingyang Tan 1 , Weiping Luo 1, 2 , Shuang‐Feng Yin 1, 2
Affiliation  

Under kinetic guidance, the stable metal‐organic framework PCN‐224 was synthesized and used as the parent MOF to embed Mn3+ to form PCN‐224(Mn). A molecule with two‐linked carboxyl groups and fluorine‐containing groups, which named 2,2′‐bis(trifluoromethyl)‐4,4′‐diphenyl phthalate (H2L), was also designed and synthesized. The PCN‐224(Mn) was then modified by introducing the H2L into its structure, forming a new hydrophobic porphyrinic MOF of PCN‐224(Mn)‐H2L. The catalytic oxidation performance of PCN‐224(Mn)‐H2L to cyclohexane was investigated. It was found that the hydrophobicity and stability of PCN‐224(Mn)‐H2L was improved markedly, and it had excellent catalytic performance with a selectivity to KA (mixture of cyclohexanone and cyclohexanol) of 90 %, a cyclohexane conversion rate of 51.3 % under mild reaction conditions, which far superior to that of PCN‐224(Mn) and the homogeneous metalloporphyrin catalysts. The catalyst remained stable after several repeated experiments.

中文翻译:

通过高效的后修饰将官能团结合到卟啉金属有机骨架中

在动力学指导下,合成了稳定的金属有机骨架PCN-224,并用作母体MOF嵌入Mn 3+形成PCN-224(Mn)。还设计并合成了具有两个羧基和含氟基团的分子,称为邻苯二甲酸2,2'-双(三氟甲基)-4,4'-联苯二酚(H 2 L)。然后通过将H 2 L引入其结构来修饰PCN‐224(Mn),形成PCN‐224(Mn)‐H 2 L的新型疏水性卟啉MOF.PCN‐224(Mn)‐的催化氧化性能研究了H 2 L为环己烷。发现PCN‐224(Mn)‐H 2的疏水性和稳定性L显着改善,并且具有优异的催化性能,在温和的反应条件下对KA(环己酮和环己醇的混合物)的选择性为90%,环己烷转化率为51.3%,远优于PCN-224(Mn )和均相的金属卟啉催化剂。在多次重复实验后,催化剂保持稳定。
更新日期:2020-05-18
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