Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Crystal Formation and Size Control of Zeolitic Imidazolate Frameworks with Mixed Imidazolate Linkers
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK), Inorganic and Structural Chemistry.
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK), Inorganic and Structural Chemistry.
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
Abstract [en]

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.
Keyword [en]
Zeolitic imidazolate framework, Metal-organic framework, Crystal engineering, Phase diagram, Crystal size and morphology control
National Category
Chemical Sciences
Research subject
Structural Chemistry
Identifiers
URN: urn:nbn:se:su:diva-74386DOI: 10.1007/s10934-012-9574-1ISI: 000312933400007OAI: oai:DiVA.org:su-74386DiVA: diva2:508549
Available from: 2012-03-09 Created: 2012-03-09 Last updated: 2017-12-07Bibliographically approved
In thesis
1. Metal-Organic Frameworks (MOFs) for Heterogeneous Catalysis: Synthesis and Characterization
Open this publication in new window or tab >>Metal-Organic Frameworks (MOFs) for Heterogeneous Catalysis: Synthesis and Characterization
2012 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Metal-organic frameworks (MOFs) are crystalline hybrid materials with interesting chemical and physical properties. This thesis is focused on the synthesis and characterization of different MOFs and their use in heterogeneous catalysis.

Zeolitic imidazolate frameworks (ZIFs), including ZIF-4, ZIF -7 and ZIF -62, Ln(btc)(H2O) (Ln: Nd, Sm, Eu, Gd, Tb, Ho, Er and Yb), Ln2(bpydc)3(H2O)3, (Ln: Sm, Gd, Nd, Eu, Tb, Ho and Er), MOF-253-Ru and Zn(Co-salophen) MOFs were synthesized. Various characterization techniques were applied to study the properties of these MOFs. X-ray powder diffraction (XRPD), single crystal X-ray diffraction (XRD), scanning electron microscopy (SEM) and thermogravimetric analysis (TGA) were extensively used.

The effect of synthesis parameters, such as batch composition and temperature, on the formation and morphology of ZIF-7 and ZIF-62 was studied. Structural transformation and flexibility of two series of lanthanide-based MOFs, Ln(btc)(H2O) (Ln: Nd, Ho and Er) and Ln2(bpydc)3(H2O)3, (Ln: Sm and Gd) upon drying and heating were characterized. Relations between metal coordination, structure flexibility and thermal stability among the Sm2(bpydc)3(H2O)3, Nd(btc)(H2O) and MOF-253 were investigated.

Salophen- and phenanthroline-based organic linkers were designed, synthesized and characterized. Metal complexes were coordinated to these linkers to be used as catalytic sites within the MOFs.

Catalytic studies using two MOF materials, Ln(btc) and MOF-253-Ru, as heterogeneous catalysts in organic transformation reactions were performed. The heterogeneous nature and recyclability of these MOFs were investigated and described.

Place, publisher, year, edition, pages
Department of Materials and Environmental Chemistry (MMK), Stockholms University, 2012. 119 p.
Keyword
metal-organic frameworks, zeolitic imidazolate frameworks, functionalized linkers, structural transformation, heterogeneous catalysis
National Category
Chemical Sciences
Research subject
Structural Chemistry
Identifiers
urn:nbn:se:su:diva-74431 (URN)978-91-7447-451-0 (ISBN)
Public defence
2012-04-13, Magnélisalen, Kemiska övningslaboratoriet, Svante Arrhenius väg 16 B, Stockholm, 10:00 (English)
Opponent
Supervisors
Note

At the time of doctoral defence the following papers were unpublished and had a status as follows: Paper nr 4: Submitted; Paper nr 5: Submitted

Available from: 2012-03-22 Created: 2012-03-12 Last updated: 2013-08-14Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Gustafsson, MikaelaZou, Xiaodong
By organisation
Inorganic and Structural Chemistry
In the same journal
Journal of porous materials
Chemical Sciences

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 161 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf