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The Chemistry of Nucleation: In Situ Pair Distribution Function Analysis of Secondary Building Units During UiO‐66 MOF Formation
- Source :
- Xu, H, Sommer, S, Broge, N L N, Gao, J & Iversen, B B 2019, ' The Chemistry of Nucleation : In Situ Pair Distribution Function Analysis of Secondary Building Units During UiO-66 MOF Formation ', Chemistry-A European Journal, vol. 25, no. 8, pp. 2051-2058 . https://doi.org/10.1002/chem.201805024, Chemistry-a European journal 25(8), 2051-2058 (2019). doi:10.1002/chem.201805024
- Publication Year :
- 2019
- Publisher :
- Wiley, 2019.
-
Abstract
- Chemistry - a European journal 25(8), 2051 - 2058 (2019). doi:10.1002/chem.201805024<br />The concept of secondary building units (SBUs) is central to all science on metal‐organic frameworks (MOFs), and they are widely used to design new MOF materials. However, the presence of SBUs during MOF formation remains controversial, and the formation mechanism of MOFs remains unclear, due to limited information about the evolution of prenucleation cluster structures. Here in situ pair distribution function (PDF) analysis was used to probe UiO‐66 formation under solvothermal conditions. The expected SBU—a hexanuclear zirconium cluster—is present in the metal salt precursor solution. Addition of organic ligands results in a disordered structure with correlations up to 23 Å, resembling crystalline UiO‐66. Heating leads to fast cluster aggregation, and further growth and ordering results in the crystalline product. Thus, SBUs are present already at room temperature and act as building blocks for MOF formation. The proposed formation steps provide insight for further development of MOF synthesis.<br />Published by Wiley-VCH, Weinheim
- Subjects :
- In situ
secondary building units
nucleation
Nucleation
chemistry.chemical_element
010402 general chemistry
01 natural sciences
Catalysis
Metal
metal–organic frameworks
in situ PDF
Cluster (physics)
SBus
Zirconium
010405 organic chemistry
Organic Chemistry
Pair distribution function
General Chemistry
0104 chemical sciences
chemistry
Chemical engineering
UiO-66
visual_art
ddc:540
visual_art.visual_art_medium
Metal-organic framework
Subjects
Details
- ISSN :
- 15213765 and 09476539
- Volume :
- 25
- Database :
- OpenAIRE
- Journal :
- Chemistry – A European Journal
- Accession number :
- edsair.doi.dedup.....299fc25ee84bd796108dd9fd5b720051