(HCl)2(CH3OH)2(X) (X= NH3 VEYA H2O) KÜMELERİNDE PROTON DİNAMİĞİNİN TEORİK OLARAK İNCELENMESİ
Öz
Proton transfer in H-bonded molecular systems plays a vital role in many research areas such as biological, technological and atmospherical. The aim of this study is to investigate the dynamics of proton transfer along the methanol wires by addition of NH3 or H2O to the methanol ring at low temperatures. On-the-fly molecular dynamics as implemented in the density functional code QUICKSTEP which is part of CP2K package were used in this study. In NH3 containing methanol clusters, the proton is localized on NH3. On the other hand, the proton is delocalized along the methanol wires containing water molecule.
Anahtar Kelimeler
Kaynakça
- [1] Kobayashi, C., Saito, S., Ohmine, I. Mechanism of fast proton transfer in ice: Potential energy surface and reaction coordinate analyses. J Chem Phys 2000; 113: 9090.
- [2] Sadeghi, R. R., Cheng, H.-P. The dynamics of proton transfer in a water chain. J Chem Phys 1999; 111:2086.
- [3] Lapid, H., Agmon, N., Petersen, M. K., Voth, G. A. A bond-order analysis of the mechanism for hydrated proton mobility in liquid water. J Chem Phys 2005; 122:014506.
- [4] Marx, D., Tuckerman, M. E., Hutter, J., Parinello, M. The nature of the hydrated excess proton in water. Nature 1999; 397:601.
- [5] Falk, M., Whalley, E. Infrared Spectra of Methanol and Deuterated Methanols in Gas, Liquid, and Solid Phases. J Chem Phys 1961; 34:1554.
- [6] Buck, U., Huiken, F. Infrared Spectroscopy of Size-Selected Water and Methanol Clusters. Chem Rev 2000; 100:3863.
- [7] Andrzejewska A., Sadlej, J. Ab initio study on mixed methanol–hydrogen chloride dimer and trimers. Chem Phys Lett 2004; 393:228.
- [8] Fujii, A., Enomoto, S., Miyazaki, M., Mikami, N. Morphology of Protonated Methanol Clusters: An Infrared Spectroscopic Study of Hydrogen Bond Networks of H+(CH3OH) (n = 4−15). J Phys Chem A 2005; 109:138.
- [9] Chang, . H.-C., Jiang, J.-C., Lin, S. H., Lee, Y. T., Chang, H.-C. Isomeric Transitions between Linear and Cyclic H+(CHOH)4-5: Implications for Proton Migration in Liquid Methanol. J Phys Chem A 1999; 103:2941.
- [10] Morrone, J. A., Tuckerman, M. E. Ab initio molecular dynamics study of proton mobility in liquid methanol. J Chem Phys 2002; 117:4403.