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Fluoride Ion Interactions in Alkali-Metal Fluoride-Diol Complexes.
Yuto Tonouchi1, Kazuhiko Matsumoto1, Takashi Nagata2
1Graduate School of Energy Science, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan.
Inorganic Chemistry
|April 23, 2020
Summary
This study reveals how alkali-metal fluoride-diol complexes form distinct structures based on cation size and diol chain length. Fluoride-ion interactions with diols are dominated by hydrogen bonding, influencing reactivity in fluorine chemistry.
Area of Science:
- Inorganic Chemistry
- Materials Science
- Supramolecular Chemistry
Background:
- Fluoride ion (F-) activity is crucial for designing reactions involving fluorine compounds.
- Understanding F- interactions with organic molecules like diols is key to controlling reactivity.
Purpose of the Study:
- To investigate the structural and interactive properties of alkali-metal fluoride-diol complexes.
- To elucidate the role of cation size and diol chain length in dictating complex structures and F- coordination.
Main Methods:
- Synthesis and characterization of alkali-metal fluoride-diol complex salts.
- X-ray diffraction to determine crystal structures.
- Hirshfeld surface analysis and infrared spectroscopy to study F- interactions.
Main Results:
- Alkali-metal fluoride reactivity and solubility increase with cation size.
- Complex structures vary from layered (CsF) to columnar (RbF, KF) based on cation size.
- Diol chain length influences bridging modes in layered structures.
- F-···H interactions are stronger than F-···M+ interactions, confirmed by spectroscopy and surface analysis.
Conclusions:
- Cation size and diol structure dictate the supramolecular assembly of fluoride-diol complexes.
- Hydrogen bonding interactions involving F- significantly impact the coordination environment and reactivity.
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