Details
| Original language | English |
|---|---|
| Pages (from-to) | 60-64 |
| Number of pages | 5 |
| Journal | European Journal of Inorganic Chemistry |
| Issue number | 1 |
| Publication status | Published - 21 Dec 2006 |
Abstract
The oriented in situ crystallisation of microporous manganese(II) formate [Mn(HCO2)2] on different porous supports (e.g. porous alumina and graphite) has been investigated. The anisotropic growth of Mn(HCO2)2 was examined by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The intracrystalline diffusion of methanol in Mn(HCO2)2 was studied by observation of the sorption kinetics by interference microscopy (IFM). It was found that untreated discs of porous alumina and graphite supports exhibit poor densities of Mn(HCO 2)2 crystals per supported area. Even lower crystal densities are found for activated supports such as for alumina after basic treatment and for oxidized graphite supports. Improved results have been achieved by replacing formic acid by sodium formate in the synthesis route. Crystal growth on graphite gives results superior to those on alumina with respect to the crystal density as well as the relative orientation of the 1D channel network to the support surface. Methanol uptake from the vapour phase is similar at 25 and 40°C and gives an adsorption capacity of about 95 mL g-1. The BET surface area was found to be 280 m2g -1. IFM indicates that diffusion occurs only along one crystallographic axis, thus proving the presence of a 1D channel system. Diffusion coefficients of about 10-12 m2 s-1 for methanol in microporous Mn(HCO2)2 were found. These results can be used to prepare supported metal-organic framework (MOF) membranes for molecular sieving.
Keywords
- Anisotropic mass transport, Manganese, Membranes, Organic-inorganic hybrid composites, Oriented crystallisation
ASJC Scopus subject areas
- Chemistry(all)
- Inorganic Chemistry
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In: European Journal of Inorganic Chemistry, No. 1, 21.12.2006, p. 60-64.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Oriented crystallisation on supports and anisotropic mass transport of the metal-organic framework manganese formate
AU - Arnold, Mirko
AU - Kortunov, Pavel
AU - Jones, Deborah J.
AU - Nedellec, Yannig
AU - Kärger, Jörg
AU - Caro, Jürgen
PY - 2006/12/21
Y1 - 2006/12/21
N2 - The oriented in situ crystallisation of microporous manganese(II) formate [Mn(HCO2)2] on different porous supports (e.g. porous alumina and graphite) has been investigated. The anisotropic growth of Mn(HCO2)2 was examined by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The intracrystalline diffusion of methanol in Mn(HCO2)2 was studied by observation of the sorption kinetics by interference microscopy (IFM). It was found that untreated discs of porous alumina and graphite supports exhibit poor densities of Mn(HCO 2)2 crystals per supported area. Even lower crystal densities are found for activated supports such as for alumina after basic treatment and for oxidized graphite supports. Improved results have been achieved by replacing formic acid by sodium formate in the synthesis route. Crystal growth on graphite gives results superior to those on alumina with respect to the crystal density as well as the relative orientation of the 1D channel network to the support surface. Methanol uptake from the vapour phase is similar at 25 and 40°C and gives an adsorption capacity of about 95 mL g-1. The BET surface area was found to be 280 m2g -1. IFM indicates that diffusion occurs only along one crystallographic axis, thus proving the presence of a 1D channel system. Diffusion coefficients of about 10-12 m2 s-1 for methanol in microporous Mn(HCO2)2 were found. These results can be used to prepare supported metal-organic framework (MOF) membranes for molecular sieving.
AB - The oriented in situ crystallisation of microporous manganese(II) formate [Mn(HCO2)2] on different porous supports (e.g. porous alumina and graphite) has been investigated. The anisotropic growth of Mn(HCO2)2 was examined by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The intracrystalline diffusion of methanol in Mn(HCO2)2 was studied by observation of the sorption kinetics by interference microscopy (IFM). It was found that untreated discs of porous alumina and graphite supports exhibit poor densities of Mn(HCO 2)2 crystals per supported area. Even lower crystal densities are found for activated supports such as for alumina after basic treatment and for oxidized graphite supports. Improved results have been achieved by replacing formic acid by sodium formate in the synthesis route. Crystal growth on graphite gives results superior to those on alumina with respect to the crystal density as well as the relative orientation of the 1D channel network to the support surface. Methanol uptake from the vapour phase is similar at 25 and 40°C and gives an adsorption capacity of about 95 mL g-1. The BET surface area was found to be 280 m2g -1. IFM indicates that diffusion occurs only along one crystallographic axis, thus proving the presence of a 1D channel system. Diffusion coefficients of about 10-12 m2 s-1 for methanol in microporous Mn(HCO2)2 were found. These results can be used to prepare supported metal-organic framework (MOF) membranes for molecular sieving.
KW - Anisotropic mass transport
KW - Manganese
KW - Membranes
KW - Organic-inorganic hybrid composites
KW - Oriented crystallisation
UR - http://www.scopus.com/inward/record.url?scp=33846307790&partnerID=8YFLogxK
U2 - 10.1002/ejic.200600698
DO - 10.1002/ejic.200600698
M3 - Article
AN - SCOPUS:33846307790
SP - 60
EP - 64
JO - European Journal of Inorganic Chemistry
JF - European Journal of Inorganic Chemistry
SN - 1434-1948
IS - 1
ER -