| DOI | Resolve DOI: https://doi.org/10.1021/jp1094273 |
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| Author | Search for: Shin, W.; Search for: Shin, K.1; Search for: Seol, J.; Search for: Koh, D.-Y.; Search for: Park, S.; Search for: Lee, H. |
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| Affiliation | - National Research Council of Canada
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| Format | Text, Article |
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| Subject | Brine rejections; Clathrate hydrate; Cobalt complexes; Host lattice; Hydrate formation; Metastabilities; Metastable structures; NMR spectrum; Water cage; Cobalt; Ethane; Hydrates; Hydration; Ions; Metal complexes; Metastable phases; Nuclear magnetic resonance spectroscopy; Cobalt compounds |
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| Abstract | The metal complex of [Co(NH3)6]3+ is introduced to C2H6 hydrate to confirm its possible inclusion in hydrogen-bonded water cages and the occurrence of metastable structure. The 13C NMR spectra of C2H6 + ([Co(NH3)6]Cl3 + 6NaOH in D2O) hydrate confirmed a new peak at 6.5 ppm matching with C2H6 in sII-L cages. The retarded appearance of metastable sII phase is due to brine rejection of the cobalt complex occurring during solution freezing. The anions of OH- and F- were found to be incorporated in the host water cage framework, providing proton-deficient sites. The ionic conductivity of the frozen [Co(NH3)6]3+ solution increased up to 20-fold after ethane hydrate formation, implying the incorporation of F- into the host lattice. A notable finding of this work is that the metastability occurs only when the cobalt complex is in the presence of anions such as OH- and F-. © 2011 American Chemical Society. |
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| Publication date | 2011 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 21271670 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 4d87e8fd-b930-4b73-a7bf-d71489f48968 |
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| Record created | 2014-03-24 |
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| Record modified | 2020-04-21 |
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