title: Implementation of an adaptive umbrella sampling method for the calculation of multidimensional potential of mean force of chemical reactions in solution.
abstract: We describe the implementation of an adaptive umbrella sampling method, making use of the weighted histogram analysis method, for computing multidimensional potential of mean force for chemical reaction in solution. The approach is illustrated by investigating the effect of aqueous solution on the free energy surface for the proton transfer reaction of [H(3)N-H-NH(3)](+) using a combined quantum mechanical and molecular mechanical AM1/TIP3P potential.
authors.affiliation: Department of Chemistry and Supercomputing Institute, Digital Technology Center, University of Minnesota, MN 55455-0431, USA.
authors.forename: Ramkumar
authors.initials: R
authors.lastname: Rajamani
authors.forename: Kevin J
authors.initials: KJ
authors.lastname: Naidoo
authors.forename: Jiali
authors.initials: J
authors.lastname: Gao
mesh_terms: D008432:Mathematical Computing; D008962:Models, Theoretical; D011522:Protons; D011789:Quantum Theory; D012996:Solutions / Q000737:chemistry; D013816:Thermodynamics; D014867:Water / Q000737:chemistry
chemical_list: D011522:Protons; D012996:Solutions; D014867:Water