Details
| Original language | English |
|---|---|
| Pages (from-to) | 492-498 |
| Number of pages | 7 |
| Journal | CRYSTENGCOMM |
| Volume | 14 |
| Issue number | 2 |
| Early online date | 27 Oct 2011 |
| Publication status | Published - 21 Jan 2012 |
Abstract
Time-resolved investigations using in situ energy-dispersive X-ray diffraction in tandem with ex situ scanning electron microscopy revealed that solvothermal crystallisation of ZIF-8 in methanol solvent and in the presence of sodium formate as a simple monodentate ligand (modulator) is a rapid process yielding big, high-quality single crystals in short time (<4 h). Kinetic analysis of crystallisation curves was performed by applying the Avrami-Erofe'ev and Gualtieri models. The analyses revealed that the weakly basic formate modulator acts as a base in deprotonation equilibria (deprotonation of the bridging 2-methylimidazole ligand) rather than as a competitive ligand in coordination equilibria at the metal (Zn2+) centres. This is in contrast to the coordination modulation function of formate in ZIF-8 synthesis at room temperature. Crystal shape evolves with time in the presence of formate from cubes with truncated edges to rhombic dodecahedra. The latter shape represents most likely the stable equilibrium morphology of ZIF-8.
ASJC Scopus subject areas
- Chemistry(all)
- General Chemistry
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: CRYSTENGCOMM, Vol. 14, No. 2, 21.01.2012, p. 492-498.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Formate modulated solvothermal synthesis of ZIF-8 investigated using time-resolved in situ X-ray diffraction and scanning electron microscopy
AU - Cravillon, Janosch
AU - Schröder, Christian A.
AU - Bux, Helge
AU - Rothkirch, André
AU - Caro, Jürgen
AU - Wiebcke, Michael
PY - 2012/1/21
Y1 - 2012/1/21
N2 - Time-resolved investigations using in situ energy-dispersive X-ray diffraction in tandem with ex situ scanning electron microscopy revealed that solvothermal crystallisation of ZIF-8 in methanol solvent and in the presence of sodium formate as a simple monodentate ligand (modulator) is a rapid process yielding big, high-quality single crystals in short time (<4 h). Kinetic analysis of crystallisation curves was performed by applying the Avrami-Erofe'ev and Gualtieri models. The analyses revealed that the weakly basic formate modulator acts as a base in deprotonation equilibria (deprotonation of the bridging 2-methylimidazole ligand) rather than as a competitive ligand in coordination equilibria at the metal (Zn2+) centres. This is in contrast to the coordination modulation function of formate in ZIF-8 synthesis at room temperature. Crystal shape evolves with time in the presence of formate from cubes with truncated edges to rhombic dodecahedra. The latter shape represents most likely the stable equilibrium morphology of ZIF-8.
AB - Time-resolved investigations using in situ energy-dispersive X-ray diffraction in tandem with ex situ scanning electron microscopy revealed that solvothermal crystallisation of ZIF-8 in methanol solvent and in the presence of sodium formate as a simple monodentate ligand (modulator) is a rapid process yielding big, high-quality single crystals in short time (<4 h). Kinetic analysis of crystallisation curves was performed by applying the Avrami-Erofe'ev and Gualtieri models. The analyses revealed that the weakly basic formate modulator acts as a base in deprotonation equilibria (deprotonation of the bridging 2-methylimidazole ligand) rather than as a competitive ligand in coordination equilibria at the metal (Zn2+) centres. This is in contrast to the coordination modulation function of formate in ZIF-8 synthesis at room temperature. Crystal shape evolves with time in the presence of formate from cubes with truncated edges to rhombic dodecahedra. The latter shape represents most likely the stable equilibrium morphology of ZIF-8.
UR - http://www.scopus.com/inward/record.url?scp=84555179089&partnerID=8YFLogxK
U2 - 10.1039/c1ce06002c
DO - 10.1039/c1ce06002c
M3 - Article
AN - SCOPUS:84555179089
VL - 14
SP - 492
EP - 498
JO - CRYSTENGCOMM
JF - CRYSTENGCOMM
SN - 1466-8033
IS - 2
ER -