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Carboxylate Stretching Modes Are Structural Probes For Ion-dependent Binding Properties In Alkali Earth Metal-edta Complexes
Foreman, Madison M.
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https://hdl.handle.net/2142/116581
Description
- Title
- Carboxylate Stretching Modes Are Structural Probes For Ion-dependent Binding Properties In Alkali Earth Metal-edta Complexes
- Author(s)
- Foreman, Madison M.
- Contributor(s)
- Weber, J. Mathias
- Issue Date
- 2022-06-22
- Keyword(s)
- Ions
- Abstract
- Ethylenediaminetetraacetic acid (EDTA) can be used as a chelating agent for binding metal ions in solution. In addition, its binding pocket is a model for the interactions between carboxylate groups and the divalent ions they often bind in some biological systems.\footnote{S. Mitra, K. Werling, E. Berquist, D. S. Lambrecht, S. Garrett-Roe, J. Phys. Chem. A 125 (2021) 4867-4881}\footnote{S. C. Edington, C. R. Baiz, J. Phys. Chem. A 122 (2018) 6585-6592}\footnote{Q. Yuan, X. T. Kong, G. L. Hou, L. Jiang, X. B. Wang, Faraday Discuss. 217 (2019) 383} With its four carboxyl groups and two nitrogen atoms, EDTA can chelate nearly any metal cation to form water-soluble complexes, making it a robust model system for studying biologically relevant divalent ion-carboxylate interactions. Here, we present cryogenic gas-phase infrared spectra of a series of alkaline earth metal-EDTA complexes of the form [M(II)$\cdot$EDTA]$^{2-}$ and assign spectral features using density functional theory calculations. The vibrational spectra encode structural and electrostatic information, reflecting the geometry of each metal ion within the EDTA binding pocket and its relation to ionic radius.
- Publisher
- International Symposium on Molecular Spectroscopy
- Type of Resource
- text
- Genre of Resource
- Conference Paper / Presentation
- Language
- eng
- Handle URL
- https://hdl.handle.net/2142/116581
- DOI
- https://doi.org/10.15278/isms.2022.WG10
- Copyright and License Information
- Copyright 2022 held by the authors
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