Issue 45, 2013

Post-synthetic incorporation of nickel into CPO-27(Mg) to give materials with enhanced permanent porosity

Abstract

Nickel cations have been introduced into framework sites of the magnesium dioxiterephthalate MOF, CPO-27(Mg), via a procedure involving post-synthetic treatment with an aqueous solution of Ni2+ cations and a weak acid. The final solids have Ni concentrations up to 70 mol% of the total cation content. Selected area EDX analysis, synchrotron X-ray powder diffraction and XPS surface analysis indicate that Ni2+ is distributed throughout the crystals with highest concentration at the external surface. A mechanism involving both crystallisation and predominant isomorphous cation replacement is proposed. The modified solids have much enhanced adsorption capacities following simple thermal evacuation under vacuum than unmodified CPO-27(Mg), particularly for N2 at 77 K, for which uptakes of 17 mmol g−1 are achieved. This is attributed to surface modification that makes the surface more stable to heating under evacuation.

Graphical abstract: Post-synthetic incorporation of nickel into CPO-27(Mg) to give materials with enhanced permanent porosity

Supplementary files

Article information

Article type
Paper
Submitted
25 ጁን 2013
Accepted
26 ሴፕቴ 2013
First published
26 ሴፕቴ 2013

CrystEngComm, 2013,15, 9779-9786

Post-synthetic incorporation of nickel into CPO-27(Mg) to give materials with enhanced permanent porosity

J. Kahr, R. E. Morris and P. A. Wright, CrystEngComm, 2013, 15, 9779 DOI: 10.1039/C3CE41228H

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