Self-assembly of tetranuclear 3d-4f helicates as highly efficient catalysts for CO2 cycloaddition reactions under mild conditions

Dalton Transactions : an International Journal of Inorganic Chemistry
Huan YangWeisheng Liu

Abstract

A series of novel asymmetry 3d-4f helicates Zn3LnL4 (H2L = N-(2-((3,5-di-tert-butyl-2-hydroxybenzylidene)amino)ethyl)-2-hydroxybenzamide, Ln = Dy(1), Gd(2), Er(3)) were successfully constructed via selective incorporation of groups with different coordination capabilities. These helicates with the well-defined conformation demonstrate high catalytic efficiency in converting CO2 to cyclic carbonates under mild conditions. Particularly, Zn3ErL4 showed superior catalytic performance with high catalytic activity (TOF up to 38 000 h-1) and extraordinary selectivity (up to 99%) across the wide substrate scope. Meanwhile, these 3d-4f helicates showed stable catalytic performance without being influenced by the moisture and air. The results presented herein highlight an important consideration for constructing heterometallic and asymmetric complexes for catalyzing CO2 conversion.

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Citations

Sep 26, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·Tanmay Rom, Avijit Kumar Paul
Feb 2, 2021·Inorganic Chemistry·Bei WangWeisheng Liu
Dec 16, 2020·Inorganic Chemistry·Stuart A J BoyceCorinna R Hess

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Methods Mentioned

BETA
X-ray

Software Mentioned

SHELXL
Olex2
SADABS

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