Initial hydration processes of magnesium chloride: size-selected anion photoelectron spectroscopy and ab initio calculations. Feng, G., Liu, C., Zeng, Z., Hou, G., Xu, H., Zheng, W., Niedner-Schatteburg, G., Bondybey, V., E., & Schröder, D. Phys. Chem. Chem. Phys., 19(23):15562-15569, Royal Society of Chemistry, 2017. Paper Website abstract bibtex To understand the initial hydration processes of MgCl2, we measured photoelectron spectra of MgCl2(H2O)n− (n = 0–6) and conducted ab initio calculations on MgCl2(H2O)n− and their neutral counterparts up to n = 7. A dramatic drop in the vertical detachment energy (VDE) was observed upon addition of the first water molecule to bare MgCl2−. This large variation in VDE can be associated with the charge-transfer-to-solvent (CTTS) effect occurring in the MgCl2(H2O)n− clusters, as hydration induces transfer of the excess electron of MgCl2− to the water molecules. Investigation of the separation of Cl−–Mg2+ ion pair shows that, in MgCl2(H2O)n− anions, breaking of the first Mg–Cl bond occurs at n = 4, while breaking of the second Mg–Cl bond takes place at n = 6. For neutral MgCl2(H2O)n clusters, breaking of the first Mg–Cl bond starts at n = 7.
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title = {Initial hydration processes of magnesium chloride: size-selected anion photoelectron spectroscopy and ab initio calculations},
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year = {2017},
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abstract = {To understand the initial hydration processes of MgCl2, we measured photoelectron spectra of MgCl2(H2O)n− (n = 0–6) and conducted ab initio calculations on MgCl2(H2O)n− and their neutral counterparts up to n = 7. A dramatic drop in the vertical detachment energy (VDE) was observed upon addition of the first water molecule to bare MgCl2−. This large variation in VDE can be associated with the charge-transfer-to-solvent (CTTS) effect occurring in the MgCl2(H2O)n− clusters, as hydration induces transfer of the excess electron of MgCl2− to the water molecules. Investigation of the separation of Cl−–Mg2+ ion pair shows that, in MgCl2(H2O)n− anions, breaking of the first Mg–Cl bond occurs at n = 4, while breaking of the second Mg–Cl bond takes place at n = 6. For neutral MgCl2(H2O)n clusters, breaking of the first Mg–Cl bond starts at n = 7.},
bibtype = {article},
author = {Feng, Gang and Liu, Cheng-Wen and Zeng, Zhen and Hou, Gao-Lei and Xu, Hong-Guang and Zheng, Wei-Jun and Niedner-Schatteburg, G. and Bondybey, V. E. and Schröder, D.},
journal = {Phys. Chem. Chem. Phys.},
number = {23}
}
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