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Coordination phenomena of alkali metal, alkaline earth metal, and indium ions with the 1,3,6-naphthalenetrisulfonate ion in protic and aprotic solvents
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| Title: | Coordination phenomena of alkali metal, alkaline earth metal, and indium ions with the 1,3,6-naphthalenetrisulfonate ion in protic and aprotic solvents |
| Authors: | Chen, Xiaohui Browse this author | | Hojo, Masashi Browse this author | | Chen, Zhidong Browse this author | | Kobayashi, Masato Browse this author |
| Keywords: | Coordination | | Stability constant | | Solubility product | | Ion pair | | Tripe ion formation | | DFT calculation |
| Issue Date: | Feb-2016 |
| Publisher: | Elsevier |
| Journal Title: | Journal of Molecular Liquids |
| Volume: | 214 |
| Start Page: | 369 |
| End Page: | 377 |
| Publisher DOI: | 10.1016/j.molliq.2015.11.040 |
| Abstract: | Not only in acetonitrile (MeCN) but also in primary alcohols (from methanol to 1-hexanol), the coordination ability of alkali metal (Li+, Na+), alkaline earth metal (Mg2+, Ca2+, or Ba2+), and indium (In3+) ions with the 1,3,6-naphthalenetrisulfonate ion (L3-, 1.0 x 10(-4) mol dm(-3)) has been examined by means of UV-visible spectroscopy. In MeCN, the precipitation takes place completely between alkali metal or alkaline earth metal ions and L3-. In the presence of excess amounts of the metal ions, the precipitates of Li3L and Mg2L3 tend to re-dissolve partially to form the "reverse" coordinated species of Li4L+ and Mg2L+. However, those precipitates of Na3L, Ca3L2, and Ba3L2 would not re-dissolve even in the presence of large excess amounts of the metal ions in MeCN. Between In3+ and L3-, both precipitation and successive re-dissolution reactions can occur in all the primary alcohols. The solubility products (pK(sp)) and "reverse" coordination constants with L3- (log K4(1+), log K2(2+), and log K2(3+) for alkali metal, alkaline earth metal, and indium ions, respectively) have been evaluated in MeCN, the primary alcohols, and binary solvents of MeCN-H2O and MeCN-MeOH. Where, for instance, K4(1+) = [M4L+]/([M+](4)[L3-]) for the reaction: 4M(+) + L3- reversible arrow M4L+. DFT calculations have been performed to predict the coordinating structures of the Li4L+ species in MeCN. (C) 2016 Elsevier B.V. All rights reserved. |
| Rights: | ©2016 This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ | | http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/68263 |
| Appears in Collections: | 理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 小林 正人
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