Designing a Bifunctional Brønsted Acid–Base Heterogeneous Catalyst Through Precise Installation of Ligands on Metal–Organic Frameworks,CCS Chemistry

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Designing a Bifunctional Brønsted Acid–Base Heterogeneous Catalyst Through Precise Installation of Ligands on Metal–Organic Frameworks
CCS Chemistry ( IF 9.4 ) Pub Date : 2019-12-06 , DOI: 10.31635/ccschem.019.201900040
Xiao-Jing Hu _{1,

2} , Zi-Xuan Li ₃ , Huan Xue ₁ , Xinsong Huang ₁ , Rong Cao _{1,

2} , Tian-Fu Liu _{1,

2}

Affiliation

A Brønsted acid–base bifunctional metal–organic framework (MOF) catalyst, PCN-700-AB [A = Brønsted acid site, TPDC–(COOH) 2 [(1,1′∶4′,1″-terphenyl)-2,2″,4,4″-tetracarboxylic acid] and B = Brønsted basic site, BDC-NH 2], was designed precisely and synthesized successfully through sequential installation of Brønsted acid and base functionalities in a crystalline zirconium (Zr)-MOF. The installation underwent single-crystal-to-single-crystal transformation throughout the process; hence, the structure of the bifunctional catalyst could be characterized accurately via single-crystal X-ray crystallography. The bifunctional MOF catalyst obtained exhibited excellent acid–base catalytic activity for a cascade of one-pot deacetalization–Knoevenagel condensation reaction. The work presented here could be considered as a promising solution to incorporate multifunctional components readily, especially the hostile aspects, into one MOF structure.

中文翻译：

通过在金属有机骨架上精确安装配体，设计出一种双功能布朗斯台德酸基多相催化剂

布朗斯台德酸碱双官能金属-有机骨架（MOF）催化剂PCN-700-AB [A =布朗斯台德酸位点，TPDC-（COOH）2 [（1,1'∶4'，1″-三联苯）-2 [2“，4,4”-四羧酸]和B =布朗斯台德碱性位点BDC-NH 2]是经过精确设计并通过在结晶锆（Zr）-MOF中依次安装布朗斯台德酸和碱官能团成功合成的。在整个过程中，安装过程经历了单晶到单晶的转变。因此，双功能催化剂的结构可以通过单晶X射线晶体学精确表征。获得的双功能MOF催化剂对一锅脱缩醛-Knoevenagel缩合反应的级联表现出优异的酸碱催化活性。

更新日期：2020-06-24

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