Heterogenizing a Homogeneous Nickel Catalyst Using Nanoconfined Strategy for Selective Synthesis of Mono- and 1,2-Disubstituted Benzimidazoles
作者:Shadab、Gargi Dey、Motahar Sk、Debasis Banerjee、Arshad Aijaz
DOI:10.1021/acs.inorgchem.1c02017
日期:2021.11.1
homogeneous Ni-phenanthroline catalyst was successfully immobilized into the cavities of a metal–organic framework, ZIF-8. The as-synthesized heterogeneous catalyst, Ni-Phen@ZIF, represents the first MOF based catalyst that enables dehydrogenative coupling of alcohols with aromatic diamines for selective synthesis of both mono- and 1,2-disubstituted benzimidazoles. The catalyst survived under harsh basic
均相 Ni-菲咯啉催化剂成功地固定在金属有机骨架 ZIF-8 的空腔中。合成的多相催化剂 Ni-Phen@ZIF 代表了第一种基于 MOF 的催化剂,它能够使醇与芳香二胺脱氢偶联,以选择性合成单和 1,2-二取代苯并咪唑。该催化剂在恶劣的碱性条件下仍然存在,通过 SEM、TEM、BET、PXRD 和 EDX 元素映射进行表征。通过 TPD 分析和动力学实验证实,纳米限制的 Ni-菲咯啉络合物的存在和在 Ni-Phen@ZIF 结构催化过程中形成额外的路易斯酸位点,可能是导致更高活性和选择性的原因。