Crystalline Cu(II) metal–organic frameworks based on a carboxamide pincer ligand and an NCONCON–Pd(II) pincer complex

Siphelele S. P. Malaza; Gift Mehlana; Ocean Cheung; Roger Hunter; Banothile C. E. Makhubela

doi:10.1039/D1CE00999K

Crystalline Cu(ii) metal–organic frameworks based on a carboxamide pincer ligand and an N^CON^CON–Pd(ii) pincer complex†

Siphelele S. P. Malaza,

^a Gift Mehlana,

*^b Ocean Cheung,

^c Roger Hunter^d and Banothile C. E. Makhubela

*^a

Author affiliations

* Corresponding authors

^a University of Johannesburg, Centre for Synthesis and Catalysis Department of Chemical Sciences, Faculty of Science, Kingsway Campus: C2 Lab 328, Auckland Park, South Africa
E-mail: bmakhubela@uj.ac.za

^b Department of Chemical Technology, Faculty of Science and Technology, Midlands State University, 9055 Senga Road, Gweru, Zimbabwe
E-mail: mehlanag@staff.msu.ac.zw

^c Nanotechnology and Functional Materials, Department of Materials Sciences and Engineering Angström Laboratory, Uppsala University, Uppsala, Sweden

^d Department of Chemistry, University of Cape Town, Rondebosch, Cape Town, South Africa

Abstract

Two new metal–organic frameworks (MOFs) with copper(II) paddlewheel secondary building units are presented. Cu-MOF and Pd@Cu-MOF were prepared in open air at room temperature from a pincer ligand 4,4′-((pyridine-2,6-dicarbonyl)bis(azanediyl))dibenzoic acid (L1) and a pincer complex N^CON^CON–Pd(II) (C1), respectively. The two crystalline 2-D frameworks Pd@Cu-MOF and Cu-MOF were characterized as microporous materials with Brunauer–Emmett–Teller (BET) surface areas of 12 m² g⁻¹ and 33 m² g⁻¹, respectively. Gas adsorption experiments revealed a low uptake of carbon dioxide by these materials attributed to crystal-to-crystal transformation of the MOFs upon activation.

This article is part of the themed collections: Crystal Engineering in Africa, Host‒Guest chemistry: in honour of Luigi Nassimbeni’s 9th decade and Coordination Networks

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Article information

DOI: https://doi.org/10.1039/D1CE00999K
Article type: Paper
Submitted: 30 7 2021
Accepted: 27 9 2021
First published: 27 9 2021

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CrystEngComm, 2021,23, 7418-7424

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Crystalline Cu(II) metal–organic frameworks based on a carboxamide pincer ligand and an N^CON^CON–Pd(II) pincer complex

S. S. P. Malaza, G. Mehlana, O. Cheung, R. Hunter and B. C. E. Makhubela, CrystEngComm, 2021, 23, 7418 DOI: 10.1039/D1CE00999K

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