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Porous purple glass – a cobalt imidazolate glass with accessible porosity from a meltable cobalt imidazolate framework

DOI: 10.1039/C8TA08016J DOI Help

Authors: Louis Frentzel-Beyme (Technische Universität Dortmund) , Marvin Kloß (Technische Universität Dortmund) , Roman Pallach (Technische Universität Dortmund) , Soma Salamon (Universität Duisburg-Essen) , Henning Moldenhauer (Technische Universität Dortmund) , Joachim Landers (Universität Duisburg-Essen) , Heiko Wende (Universität Duisburg-Essen) , Jörg Debus (Technische Universität Dortmund) , Sebastian Henke (Technische Universität Dortmund)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of Materials Chemistry A , VOL 7 , PAGES 985 - 990

State: Published (Approved)
Published: January 2019
Diamond Proposal Number(s): 21474

Abstract: We report the first microporous cobalt imidazolate glass obtained from a meltable cobalt-based zeolitic imidazolate framework, ZIF-62(Co). Crystalline ZIF-62(Co) is constructed from Co2+ cations and two different imidazolate-type linkers, namely conventional imidazolate and benzimidazolate. The microporous framework melts at ∼430 °C and converts into a glass upon cooling to room temperature. X-Ray total scattering and Raman spectroscopy reveal that the local structure of the glass and the crystalline parent material are very similar. Magnetic measurements and X-ray diffraction uncover that ZIF-62(Co) partially decomposes upon melting and glass formation resulting in the reduction of ∼3% of the Co2+ ions to metallic cobalt. Most importantly, the ZIF glass retains almost 50% of the porosity of crystalline ZIF-62(Co). Our results pave the way for the realisation of metal–organic framework glasses containing open shell metal ions, as well as the application of these porous glasses in gas separation, energy storage and catalysis.

Diamond Keywords: Gas Separation

Subject Areas: Materials, Chemistry

Instruments: I15-1-X-ray Pair Distribution Function (XPDF)

Other Facilities: DELTA Dortmund

Added On: 31/01/2019 10:02

Discipline Tags:

Zeolites Materials Science Metallurgy Metal-Organic Frameworks Chemistry Organometallic Chemistry

Technical Tags:

Scattering Total Scattering