NDLI: Drawing Out the Structural Information About the First Hydration Layer of the Isolated Cl$^{−}$ Anion Through the FTIR-ATR Difference Spectra

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Drawing Out the Structural Information About the First Hydration Layer of the Isolated Cl$^{−}$ Anion Through the FTIR-ATR Difference Spectra

Content Provider	Springer Nature Link
Author	Guo, Yu Cong Li, Xiao Hong Zhao, Li Jun Zhang, Yun Hong
Copyright Year	2013
Abstract	The Fourier transform infrared-attenuated total reflectance (FTIR-ATR) difference spectra of aqueous MgSO$_{4}$, Na$_{2}$SO$_{4}$, NaCl and MgCl$_{2}$ solutions against pure water were obtained at various concentrations. The difference spectra of the solutions showed distinct positive bands and negative bands in the O–H stretching region, indicating the influences of salts on structures of hydrogen-bonds between water molecules. Furthermore the difference spectra of MgCl$_{2}$ solutions against NaCl solutions and those of MgSO$_{4}$ solutions against Na$_{2}$SO$_{4}$ solutions with the same concentrations of anions (Cl$^{−}$ or SO 4 2− , respectively) allowed extracting the structural difference of the first hydration layer between Mg$^{2+}$ and Na$^{+}$. Using SO 4 2− as a reference ion, structural information of the first hydration layer of the Cl$^{−}$ anion was obtained according to the difference spectra of MgCl$_{2}$ solutions against MgSO$_{4}$ solutions and those of NaCl solutions against Na$_{2}$SO$_{4}$ solutions containing the same concentrations of cations (Mg$^{2+}$ or Na$^{+}$, respectively). The positive peak at ~3,407 cm$^{−1}$ and negative peak at ~3,168 cm$^{−1}$ in these spectra indicated that adding Cl$^{−}$ decreased the strongest hydrogen-bond component and increased the relatively weaker one.
Starting Page	459
Ending Page	469
Page Count	11
File Format	PDF
ISSN	00959782
Journal	Journal of Solution Chemistry
Volume Number	42
Issue Number	2
e-ISSN	15728927
Language	English
Publisher	Springer US
Publisher Date	2013-02-07
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	FTIR-ATR Hydrogen-bond Hydration layer Ions Physical Chemistry Industrial Chemistry/Chemical Engineering Geochemistry Oceanography Inorganic Chemistry Condensed Matter Physics
Content Type	Text
Resource Type	Article
Subject	Biochemistry Molecular Biology Biophysics Physical and Theoretical Chemistry

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