Universität zu Köln

Virmani, Erika, Beyer, Ole, Luening, Ulrich, Ruschewitz, Uwe ORCID: 0000-0002-6511-6894 and Wuttke, Stefan ORCID: 0000-0002-6344-5782 (2017). Topology-guided functional multiplicity of iron(III)-based metal-organic frameworks. Mat. Chem. Front., 1 (10). S. 1965 - 1975. CAMBRIDGE: ROYAL SOC CHEMISTRY. ISSN 2052-1537

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Abstract

We report here the synthesis and characterization of a new series of mixed-linker iron(III)-based metal-organic frameworks (MOFs) consisting of dicarboxylate linkers (1,4-benzenedicarboxylic acid equivalent to BDC or its amino functionalized derivative) and tricarboxylate linkers (4,4 ',4 ''-[1,3,5-triazine-2,4,6-triyl] tribenzoic acid equivalent to TATB or its nitro functionalized derivative). The resulting mesoporous MOFs with MIL-143 topology are stable under ambient water conditions for 14 d regardless of the functionalization of the organic linkers. Powder X-ray diffraction results reveal high crystallinity of the materials. This structure type is very tolerant to variation in the functional groups (e.g. nitro and/or amino) along the BDC and/or TATB linkers, but is less tolerant to changes in the size of the linkers themselves. It was attempted to replace linear BDC by biphenyl-4,4 '-dicarboxylic acid (BPDC) and trigonal TATB by 2,4-bis(4 '-carboxybiphenyl-4-yl)-6-(4 '-carboxy-2-methoxy-biphenyl-4-yl)-1,3,5-triazine (TAPB). Of the three additional structures made possible by combinations of these linkers (BDC/TAPB, BPDC/TATB, BPDC/TAPB), only one (BDC/TAPB) yields a crystalline product which, like the BDC/TATB crystal, exhibits MIL-143 topology. However, this material is not very stable and collapses upon guest removal. Our results suggest that the incorporation of diverse functional groups on linkers with different geometries in this new iron(III)-based MOF series offers a simple method of precisely tuning the chemical environment within the pores. More importantly, our work expands the scope of mixed-linker MOFs to include a subset of multivariate MOFs characterized by different functionalities in each type of linker.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Virmani, Erika UNSPECIFIED UNSPECIFIED UNSPECIFIED Beyer, Ole UNSPECIFIED UNSPECIFIED UNSPECIFIED Luening, Ulrich UNSPECIFIED UNSPECIFIED UNSPECIFIED Ruschewitz, Uwe UNSPECIFIED orcid.org/0000-0002-6511-6894 UNSPECIFIED Wuttke, Stefan UNSPECIFIED orcid.org/0000-0002-6344-5782 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-216864
DOI:	10.1039/c7qm00263g
Journal or Publication Title:	Mat. Chem. Front.
Volume:	1
Number:	10
Page Range:	S. 1965 - 1975
Date:	2017
Publisher:	ROYAL SOC CHEMISTRY
Place of Publication:	CAMBRIDGE
ISSN:	2052-1537
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Chemistry > Institute of Inorganic Chemistry
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language POROUS COORDINATION POLYMERS; CRYSTAL-STRUCTURES; ULTRAHIGH POROSITY; DRUG-DELIVERY; SURFACE-AREA; ADSORPTION; MOFS; MIL-100(FE); LINKERS; FLEXIBILITY Multiple languages Chemistry, Multidisciplinary; Materials Science, Multidisciplinary Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/21686