Density functional theory with approximate kinetic energy functionals applied to hydrogen bonds

نویسنده

  • Tomasz Adam Wesolowski
چکیده

Applicability of the approximate kinetic energy functionals to study hydrogen-bonded systems by means of the formalism of Kohn–Sham equations with constrained electron density KSCED Cortona, Phys. Rev. B 44, 8454 1991 ; Wesołowski and Warshel, J. Phys. Chem. 97, 805

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Towards the Description of Covalent Bonds in Subsystem Density-Functional Theory

Current applications of frozen-density embedding (FDE)—or more generally subsystem density-functional theory (DFT) schemes—are limited to subsystems that are not connected by covalent bonds. This restriction is due to the insufficiencies of the available approximate kinetic-energy functionals, which are used to calculate the contribution of the nonadditive kinetic energy to the effective embedd...

متن کامل

Density functional theory with an approximate kinetic energy functional applied to study structure and stability of weak van der Waals complexes

In view of further application to the study of molecular and atomic sticking on dust particles, we investigated the capability of the ‘‘freeze-and-thaw’’ cycle of the Kohn–Sham equations with constrained electron density ~KSCED! to describe potential energy surfaces of weak van der Waals complexes. We report the results obtained for C6H6 ̄X ~X5O2, N2, and CO! as test cases. In the KSCED formalis...

متن کامل

Testing the kinetic energy functional : Kinetic energy density as a density functional

A new method for defining an energy density for the noninteracting kinetic energy of density functional theory is given. The resulting energy density is a density functional determined completely by the kinetic energy functional itself. Although this method is not constructive, it allows for a direct comparison between exact and approximate functionals pointwise in space. For simple systems, th...

متن کامل

Embedded density functional theory for covalently bonded and strongly interacting subsystems.

Embedded density functional theory (e-DFT) is used to describe the electronic structure of strongly interacting molecular subsystems. We present a general implementation of the Exact Embedding (EE) method [J. Chem. Phys. 133, 084103 (2010)] to calculate the large contributions of the nonadditive kinetic potential (NAKP) in such applications. Potential energy curves are computed for the dissocia...

متن کامل

Theoretical Investigation of Interaction between 5-Fluorouracil Anticancer Drug with Various Nitrosamine Compounds

We present detailed theoretical studies of the H-bonded complexes formed from interaction between 5-fluorouracil and various six-membered cyclic nitrosamine compounds. In this study, an investigation on intermolecular interactions in X-NU (X = CH2, SiH2,BH, AlH, NH, PH, O and S) complexes is carried out using density functional theory. The calculations are conducted on B3L...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2008