Rong Zhang, Guan-sheng Zhao, Wen-juan Wu. Structures and Hydrogen Bonding Interactions in Urea-water System Studied by All-atom MD Simulation and Chemical Shifts in NMR Spectrum[J]. Chinese Journal of Chemical Physics , 2009, 22(5): 511-516. doi: 10.1088/1674-0068/22/05/511-516
Citation: Rong Zhang, Guan-sheng Zhao, Wen-juan Wu. Structures and Hydrogen Bonding Interactions in Urea-water System Studied by All-atom MD Simulation and Chemical Shifts in NMR Spectrum[J]. Chinese Journal of Chemical Physics , 2009, 22(5): 511-516. doi: 10.1088/1674-0068/22/05/511-516

Structures and Hydrogen Bonding Interactions in Urea-water System Studied by All-atom MD Simulation and Chemical Shifts in NMR Spectrum

doi: 10.1088/1674-0068/22/05/511-516
Funds:  This work was supported by the National Natural Sci-ence Foundation of China (No.20903026), the Doctoral Scientific Research Foundation of the Natural Science Foundation of Guangdong Province (No.7301567), and the Research Foundation of Guangdong Pharmaceutical University (No.2006YKX05).
  • Received Date: 2009-04-28
  • The interactions and structures of the urea-water system are studied by an all-atom molec-ular dynamics (MD) simulation. The hydrogen-bonding network and the radial distribution functions are adopted in MD simulations. The structures of urea-water mixtures can be classified into different regions from the analysis of the hydrogen-bonding network. The urea molecule shows the certain tendency to the self-aggregate with the mole fraction of urea increasing.Moreover,the results of the MD simulations are also compare with the chemical shifts and viscosities of the urea aqueous solutions, and the statistical results of the average number hydrogen bonds in the MD simulations are in agreement with the experiment data such as chemical shifts of the hydrogen atom and viscosity.
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Structures and Hydrogen Bonding Interactions in Urea-water System Studied by All-atom MD Simulation and Chemical Shifts in NMR Spectrum

doi: 10.1088/1674-0068/22/05/511-516
Funds:  This work was supported by the National Natural Sci-ence Foundation of China (No.20903026), the Doctoral Scientific Research Foundation of the Natural Science Foundation of Guangdong Province (No.7301567), and the Research Foundation of Guangdong Pharmaceutical University (No.2006YKX05).

Abstract: The interactions and structures of the urea-water system are studied by an all-atom molec-ular dynamics (MD) simulation. The hydrogen-bonding network and the radial distribution functions are adopted in MD simulations. The structures of urea-water mixtures can be classified into different regions from the analysis of the hydrogen-bonding network. The urea molecule shows the certain tendency to the self-aggregate with the mole fraction of urea increasing.Moreover,the results of the MD simulations are also compare with the chemical shifts and viscosities of the urea aqueous solutions, and the statistical results of the average number hydrogen bonds in the MD simulations are in agreement with the experiment data such as chemical shifts of the hydrogen atom and viscosity.

Rong Zhang, Guan-sheng Zhao, Wen-juan Wu. Structures and Hydrogen Bonding Interactions in Urea-water System Studied by All-atom MD Simulation and Chemical Shifts in NMR Spectrum[J]. Chinese Journal of Chemical Physics , 2009, 22(5): 511-516. doi: 10.1088/1674-0068/22/05/511-516
Citation: Rong Zhang, Guan-sheng Zhao, Wen-juan Wu. Structures and Hydrogen Bonding Interactions in Urea-water System Studied by All-atom MD Simulation and Chemical Shifts in NMR Spectrum[J]. Chinese Journal of Chemical Physics , 2009, 22(5): 511-516. doi: 10.1088/1674-0068/22/05/511-516

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