Crystal Formation and Size Control of Zeolitic Imidazolate Frameworks with Mixed Imidazolate Linkers
2013 (English)In: Journal of porous materials, ISSN 1380-2224, E-ISSN 1573-4854, Vol. 20, no 1, 55-63 p.Article in journal (Refereed) Published
The effect of synthesis parameters, such as batch composition and synthesis temperature, on the formationand crystal size of zeolitic imidazolate frameworks(ZIFs) using mixed linkers, imidazole (Im) and benzimidazole(bIm), were studied by X-ray powder diffraction(XRPD) and scanning electron microscopy (SEM). ZIF-7and ZIF-62 were identified as the main phases and a phasediagram relating the batch composition and the finalproduct was constructed based on XRPD and SEM. Therange of batch composition giving rise to ZIF-7 and ZIF-62was identified from the phase diagram. Changes of crystalsize and morphology of ZIF-7 and ZIF-62 in terms of batchcomposition and synthesis temperature were studied bySEM and different trends were observed for the two ZIFs.Thermogravimetric analysis (TGA) and in situ XRPDshowed that ZIF-62 possesses a similar high thermal stabilityas ZIF-7.
Place, publisher, year, edition, pages
2013. Vol. 20, no 1, 55-63 p.
Zeolitic imidazolate framework, Metal-organic framework, Crystal engineering, Phase diagram, Crystal size and morphology control
Research subject Structural Chemistry
IdentifiersURN: urn:nbn:se:su:diva-74386DOI: 10.1007/s10934-012-9574-1ISI: 000312933400007OAI: oai:DiVA.org:su-74386DiVA: diva2:508549