Jump to main content
Jump to site search

Issue 2, 2015
Previous Article Next Article

Transition metal inclusion in RhoZMOF materials

Author affiliations


Porous RhoZMOF is a negatively charged zeolite-like MOF material susceptible to post-synthesis modification by an ion-exchange process replacing as-synthesized organic cations with transition metals. This material exhibiting open transition metal sites is a very attractive candidate for industrial applications related to clean energy technologies, like electrochemistry and gas storage. In the present work, partial or total Co2+, Ni2+ and Cu2+ inclusions have been successfully carried out in the RhoZMOF structure by ion-exchange treatment. Particularly, complete exchange of HDMA+ with Co2+ could be reached at room temperature after 12 h of contact time. For Cu2+ exchange, a rapid transformation of the RhoZMOF structure into a new Cu-rich, crystalline and practically non-porous phase was observed at room temperature; its appearance can be avoided and the desired structure can be preserved when ion-exchange treatment is carried out at −20 °C for 6 h, reaching a partial ion-exchange degree of 30%. Moreover, for Ni2+ ion-exchange treatment at 25 and 0 °C, a covering of an amorphous Ni-rich organometallic phase over the crystals was detected by SEM analysis; its appearance can be prevented by reducing the amount of HDMA+ in the media by developing the ion-exchange process in two steps: exchanging HDMA+ with Na+ and Na+ with Ni2+. The results provide a post-synthesis modification route for obtaining porous MOF materials containing open transition metal sites accessible for redox catalysis and selective gas adsorption.

Graphical abstract: Transition metal inclusion in RhoZMOF materials

Back to tab navigation

Supplementary files

Publication details

The article was received on 07 Jul 2014, accepted on 22 Sep 2014 and first published on 22 Sep 2014

Article type: Paper
DOI: 10.1039/C4CE01401D
Author version
Download author version (PDF)
Citation: CrystEngComm, 2015,17, 338-343

  •   Request permissions

    Transition metal inclusion in RhoZMOF materials

    G. Calleja, C. Martos, G. Orcajo, J. A. Botas and J. A. Villajos, CrystEngComm, 2015, 17, 338
    DOI: 10.1039/C4CE01401D

Search articles by author