Mixed Metal-Organic Framework with Multiple Binding Sites for Efficient C H /CO Separation

Overview

Journal Angew Chem Int Ed Engl

Specialty Chemistry

Date 2020 Jan 17

PMID 31944515

Citations 16

Authors

Junkuo Gao

Xuefeng Qian

Rui-Biao Lin

Rajamani Krishna

Hui Wu

Wei Zhou

Banglin Chen

Affiliations

Soon will be listed here.

Abstract

The separation of C H /CO is particularly challenging owing to their similarities in physical properties and molecular sizes. Reported here is a mixed metal-organic framework (M'MOF), [Fe(pyz)Ni(CN) ] (FeNi-M'MOF, pyz=pyrazine), with multiple functional sites and compact one-dimensional channels of about 4.0 Å for C H /CO separation. This MOF shows not only a remarkable volumetric C H uptake of 133 cm cm , but also an excellent C H /CO selectivity of 24 under ambient conditions, resulting in the second highest C H -capture amount of 4.54 mol L , thus outperforming most previous benchmark materials. The separation performance of this material is driven by π-π stacking and multiple intermolecular interactions between C H molecules and the binding sites of FeNi-M'MOF. This material can be facilely synthesized at room temperature and is water stable, highlighting FeNi-M'MOF as a promising material for C H /CO separation.

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