Issue 48, 2019

Interpenetration isomers in isoreticular amine-tagged zinc MOFs

Abstract

The effect of increasing steric size of pendant amine substituents on structural isoreticulation has been studied systematically in a series of Zn-MOFs. Linear biphenyl dicarboxylic acids tagged with pendant primary amine (H2bpdc-NH2), allylamine (H2bpdc-NHallyl), diallylamine (H2bpdc-N(allyl)2) and dimethylamine (H2bpdc-NMe2) groups react with zinc nitrate in DMF to yield a set of interpenetrated MOFs, WUF-11–14, respectively, that are structurally akin to IRMOF-9. The allylated amine ligands undergo C–N cleavage reactions under the synthesis conditions, yielding WUF-12 and WUF-13 as multivariate MOFs. The single crystal X-ray crystallography on this set of MOFs was not straightforward and we give a salutary account of the difficulties encountered. Gas adsorption measurements combined with surface area calculations provide invaluable support for the crystallographic assignments. The crystallographic analyses reveal subtle differences in the relative positions of the interpenetrating frameworks, and we present a classification system for this type of MOF and analyse related examples available in the literature. CO2 adsorption measurements revealed that WUF-14, which features the strongest Brønsted basic dimethylamine tag group, has the highest capacity, isosteric heat of adsorption, and CO2/N2 selectivity.

Graphical abstract: Interpenetration isomers in isoreticular amine-tagged zinc MOFs

Supplementary files

Article information

Article type
Paper
Submitted
22 Oct 2019
Accepted
18 Nov 2019
First published
19 Nov 2019

CrystEngComm, 2019,21, 7498-7506

Interpenetration isomers in isoreticular amine-tagged zinc MOFs

A. Khansari, M. R. Bryant, D. R. Jenkinson, G. B. Jameson, O. T. Qazvini, L. Liu, A. D. Burrows, S. G. Telfer and C. Richardson, CrystEngComm, 2019, 21, 7498 DOI: 10.1039/C9CE01669D

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements