Yordanova, DenitsaDenitsaYordanovaSmirnova, IrinaIrinaSmirnovaJakobtorweihen, SvenSvenJakobtorweihen2020-07-012020-07-012015-04-09Journal of Chemical Theory and Computation 5 (11): 2329-2340 (2015-05-12)http://hdl.handle.net/11420/6531Nonionic surfactants of the Triton X-series find various applications in extraction processes and as solubilizing agents for the purification of membrane proteins. However, so far no optimized parameters are available to perform molecular simulations with a biomolecular force field. Therefore, we have determined the first optimized set of CHARMM parameters for the Triton X-series, enabling all-atom molecular dynamics (MD) simulations. In order to validate the new parameters, micellar sizes (aggregation numbers) of Triton X-114 and Triton X-100 have been investigated as a function of temperature and surfactant concentration. These results are comparable with experimental results. Furthermore, we have introduced a new algorithm to obtain micelle structures from self-assembly MD simulations for the COSMOmic method. This model allows efficient partition behavior predictions once a representative micelle structure is available. The predicted partition coefficients for the systems Triton X-114/water and Triton X-100/water are in excellent agreement with experimental results. Therefore, this method can be applied as a screening tool to find optimal solute-surfactant combinations or suitable surfactant systems for a specific application.en1549-96262015523292340Soc.ChemieTechnikJournal Article10.1021/acs.jctc.5b00026Other