Metathetical Reaction of Organic Uranyl Species with Water in the Gas Phase

Chem. J. Chinese Universities

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Metathetical Reaction of Organic Uranyl Species with Water in the Gas Phase

HU Bin¹, CHEN Lan-Hui³, HUAN Yan-Fu², ZHANG Xie¹, LI Ming², LIANG Hua-Zheng¹, CHEN Huan-Wen^1,2*

1. Department of Applied Chemistry, East China Institute of Technology Institution, Fuzhou 344000, China;
2. College of Chemistry, Jilin University, Changchun 130021, China;
3. Institute of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun 130024, China

Received:2007-08-13 Revised:1900-01-01 Online:2008-05-10 Published:2008-05-10
Contact: CHEN Huan-Wen

Abstract

Abstract: Negatively charged organic uranyl species(CH₃UO₂OH) was prepared and characterized with electrospray ionization tandem mass spectrometry implemented on an LTQ-MS instrument. Experimentally, it was found that ionic species of CH₃UO₂OH underwent metathetical reaction with water molecules present in the ion trap to produce negative ions of m/z 304 and a neutral methane species in the gas phase. The transient state of the reaction was observed and identified in the gas phase by tandem mass spectrometry. The mechanism was discussed in detail. The Gibbs free energy(Δ_rG), enthalpy(Δ_rH) and entropy(Δ_rS) for the reaction were calculated, on the basis of the experimental measurements, to be -473.0 kJ/mol, -236.5 kJ/mol and 0.792 kJ·mol^-1·K^-1, respectively. The reaction rate constant was experimentally estimated to be 2.26 s^-1.

Key words: Gas-phase metathesis, Uranyl acetate, Electrospray ionization, Collision-induced dissociation, Ion/molecule reaction

CLC Number:

O657

TrendMD:

HU Bin¹, CHEN Lan-Hui³, HUAN Yan-Fu², ZHANG Xie¹, LI Ming², LIANG Hua-Zheng¹, CHEN Huan-Wen^1,2*. Metathetical Reaction of Organic Uranyl Species with Water in the Gas Phase[J]. Chem. J. Chinese Universities, doi: .

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Metathetical Reaction of Organic Uranyl Species with Water in the Gas Phase

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