Journal article
Sorption discrimination between secondary alcohol enantiomers by chiral alkyl-dicarboxylate MOFs
RSC advances, v 6(96), pp 93707-93714
01 Jan 2016
Abstract
The 3D coordination polymer [Co-2(H2O)(cpda)(2)(py)4 center dot py](n) (cpdaH(2) is trans-(S, S)-1,2-cyclopropane dicarboxylic acid, py = pyridine) crystallizes from pyridine as 1.5py (one py is not coordinated) and was characterized by X-ray single crystal diffraction. Desolvation of 1.5py was accomplished with decoordination of pyridine and transformation of the Co-II octahedral coordination into tetrahedral, as confirmed by electronic spectroscopy. Sorption of individual optical isomers - (S)-2-butanol and (R)-2-butanol -from the gas phase at 303 K by desolvated 1 was studied, and for comparison sorption of these substrates by the chiral MOFs [Zn-2(camph)(2)(bipy)](n) (2) and [Zn-2(camph)(2)(dpe)](n) (3) was examined (camphH2 is (1R, 3S)-camphoric acid, bipy is 4,4'-bipyridine, dpe is trans-1,2-di(4-pyridyl) ethylene). Chiral sites in 1-3 contain only one polar group (carboxylate) in close proximity to the asymmetric C atom, while the other groups contain only C-H or C-C bonds. In the cases of 1 or 2 the absorption isotherms grew abruptly at certain pressure values P, and these values were different for the (R) or (S) isomers' sorptions. Such differential growth can be accounted for through the polymeric framework's rearrangement induced by interaction with 2-butanol, the difference in P values for (R) and (S) isomers being an indication of different interaction energies for these isomers with the MOF. There was no significant difference between the values of total sorption capacity of 1 for the two enantiomers of 2-butanol at pressures close to the saturation vapor pressure. In contrast, the sorption capacity of 3 was higher for (R)-2-butanol than for (S)-2-butanol over the whole pressure range.
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Details
- Title
- Sorption discrimination between secondary alcohol enantiomers by chiral alkyl-dicarboxylate MOFs
- Creators
- Yulia A. Satska - L.V. Pisarzhevskii Institute of Physical ChemistryElena A. Mikhalyova - L.V. Pisarzhevskii Institute of Physical ChemistryZhanna V. Chernenko - L.V. Pisarzhevskii Institute of Physical ChemistrySergey V. Kolotilov - L.V. Pisarzhevskii Institute of Physical ChemistryMatthias Zeller - Purdue University West LafayetteIgor V. Komarov - Taras Shevchenko National University of KyivAndriy V. Tymtsunik - Taras Shevchenko National University of KyivAndrey Tolmachev - Taras Shevchenko National University of KyivKonstantin S. Gavrilenko - Taras Shevchenko National University of KyivAnthony W. Addison - Drexel University
- Publication Details
- RSC advances, v 6(96), pp 93707-93714
- Publisher
- Royal Soc Chemistry
- Number of pages
- 8
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Chemistry
- Web of Science ID
- WOS:000385631900061
- Scopus ID
- 2-s2.0-84991252059
- Other Identifier
- 991019168985004721
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- Collaboration types
- Industry collaboration
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Multidisciplinary