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Hydrogen-bonded supramolecular metal-imidazolate frameworks : gas sorption, magnetic and UV/Vis spectroscopic properties

Title data

Alrefai, Anas ; Mondal, Suvendu Sekhar ; Wruck, Alexander ; Kelling, Alexandra ; Schilde, Uwe ; Brandt, Philipp ; Janiak, Christoph ; Schönfeld, Sophie ; Weber, Birgit ; Rybakowski, Lawrence ; Herrmann, Carsten ; Brennenstuhl, Katlen ; Eidner, Sascha ; Kumke, Michael ; Behrens, Karsten ; Günter, Christina ; Müller, Holger ; Holdt, Hans-Jürgen:
Hydrogen-bonded supramolecular metal-imidazolate frameworks : gas sorption, magnetic and UV/Vis spectroscopic properties.
In: Journal of Inclusion Phenomena and Macrocyclic Chemistry. Vol. 94 (2019) Issue 3-4 . - pp. 155-165.
ISSN 1573-1111
DOI: https://doi.org/10.1007/s10847-019-00926-6

Abstract in another language

By varying reaction parameters for the syntheses of the hydrogen-bonded metal-imidazolate frameworks (HIF) HIF-1 and HIF-2 (featuring 14 Zn and 14 Co atoms, respectively) to increase their yields and crystallinity, we found that HIF-1 is generated in two different frameworks, named as HIF-1a and HIF-1b. HIF-1b is isostructural to HIF-2. We determined the gas sorption and magnetic properties of HIF-2. In comparison to HIF-1a (Brunauer–Emmett–Teller (BET) surface area of 471 m² g−1), HIF-2 possesses overall very low gas sorption uptake capacities [BET(CO2) surface area = 85 m² g−1]. Variable temperature magnetic susceptibility measurement of HIF-2 showed antiferromagnetic exchange interactions between the cobalt(II) high-spin centres at lower temperature. Theoretical analysis by density functional theory confirmed this finding. The UV/Vis-reflection spectra of HIF-1 (mixture of HIF-1a and b), HIF-2 and HIF-3 (with 14 Cd atoms) were measured and showed a characteristic absorption band centered at 340 nm, which was indicative for differences in the imidazolate framework.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Anorganic Chemistry IV > Chair Anorganic Chemistry IV - Univ.-Prof. Dr. Birgit Weber
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 24 Jul 2019 09:19
Last Modified: 24 Jul 2019 09:19
URI: https://eref.uni-bayreuth.de/id/eprint/51564