The structure around the perchlorate ion in concentrated aqueous solutions |
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| Affiliation: | 1. CNR-IAS, National Research Council - Institute of Anthropic Impact and Sustainability in Marine Environment, Oristano Section, Località Sa Mardini, 09170 Torregrande, Oristano, Italy;2. DISAT, Department of Earth and Environmental Science, University of Milano Bicocca, Piazza della Scienza 1, 20126 Milano, Italy;3. MaRHE Center (Marine Research and High Education Center), Magoodhoo Island, Faafu Atoll, Republic of Maldives;4. CNR-IPCB, National Research Council - Institute of Polymers, Composites and Biomaterials, Via Campi Flegrei, 34-80078 Pozzuoli, Napoli, Italy;5. DICMaPI, Department of Chemical, Materials and Production Engineering, University of Naples “Federico II”, Piazzale Tecchio, 80, 80125 Napoli, Italy;6. ISPRA, Italian National Institute for Environmental Protection and Research, Via del Fosso di Fiorano 64, 00143 Roma, Italy;7. La Sapienza'' University of Rome, Department of Environmental Biology, Piazzale Aldo Moro 5, 00185 Roma, Italy;1. Department of Thin Films and Nanostructures, FZU - Institute of Physics of the Czech Academy of Sciences, Cukrovarnicka 10/112 162 00 Prague 6, Czech Republic;2. Department of Physical Chemistry and Macromolecular Chemistry, Faculty of Science, Charles University, Hlavova 2030, 128 43 Prague 2, Czech Republic;3. J. Heyrovsky Institute of Physical Chemistry of the Czech Academy of Sciences, Dolejskova 2155/3, 183 23 Prague 8, Czech Republic;4. Department of Magnetics and Superconductors, FZU - Institute of Physics of the Czech Academy of Sciences, Cukrovarnicka 10/112 162 00 Prague 6, Czech Republic;5. Department of Optical Materials, FZU - Institute of Physics of the Czech Academy of Sciences, Cukrovarnicka 10/112 162 00 Prague 6, Czech Republic;1. Gdansk University of Technology, Faculty of Civil and Environmental Engineering, Department of Environmental Engineering Technology, 11/12 Narutowicza St., Gdansk 80-233, Poland;2. Gdansk University of Technology, Faculty of Chemistry, Analytical Chemistry Department, 11/12 Narutowicza St., Gdansk 80-233, Poland;3. Department of Environmental Science and Bioscience, Kristianstad University, Elmetorpsvägen 15, SE-291 88 Kristianstad, Sweden;4. Department of Chemistry, Aristotle University of Thessaloniki, GR 54124 Thessaloniki, Greece;5. Centre for Interdisciplinary Research and Innovation (CIRI-AUTH), Balkan Center, 10th km Thessaloniki-Thermi Rd, Thessaloniki GR 57001, Greece |
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| Abstract: | A neutron diffraction study has been carried out on a 3.25 modal solution of NaClO4 in heavy water, in which the first-order difference method of isotopic substitution was applied to chlorine atoms of the ClO4− ion. The results show that (a) the intramolecular separation of Cl-O is 1.43 ± 0.02 Å in good agreement with X-ray diffraction results from single-crystal studies. (b) there are between four and five nearest-neighbour deuterium atoms in the range 2.4 ⩽ r ⩽ 3.2 Å. and (c) the ClO4−-water coordination is less well defined than that for Cl−-water, but similar to that for the NO3−-water structure. |
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