Electronic polarization of liquid water: converged Monte Carlo-quantum mechanics results for the multipole moments

نویسندگان

  • K. Coutinho
  • Sylvio Canuto
چکیده

Sequential Monte Carlo/Quantum Mechanical (S-MC/QM) calculations of the dipole moment of liquid water using extensive and different quantum chemical methods and statistically converged results give an induced dipole moment of 0:74 0:14 D. This corresponds to a dipole moment of liquid water of 2:60 0:14 D, in excellent agreement with the value derived from the dielectric constant and other previous theoretical estimates. Change in multipole moments are also reported using statistically converged MP2/aug-cc-pVQZ calculations. 2003 Elsevier Science B.V. All rights reserved.

برای دانلود 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

Electronic Polarization of 1H-Benzotriazole in Water: Ground and First Excited-State Dipole Moments

Sequential Monte Carlo and quantum mechanical calculations of the electronic polarization of the ground and first vertical excited states of 1H-benzotriazole in water are made. Using statistically uncorrelated configurations and CASSCF ab initio calculations the increase in the ground and excited state dipole moments of 1Hbenzotriazole from gas phase to aqueous environment are obtained as 2.89 ...

متن کامل

Quantum, intramolecular flexibility, and polarizability effects on the reproduction of the density anomaly of liquid water by simple potential functions

The ability of simple potential functions to describe the properties of liquid water at a range of thermodynamic state points has been explored. These simple potential function models represent a water molecule by a set of sites, either rigid or flexible relative to each other, that interact with a simple, generally classical, Hamiltonian, which has parameters that are empirically determined. C...

متن کامل

Rapid estimation of electronic degrees of freedom in Monte Carlo calculations for polarizable models of liquid water

The inclusion of electronic polarization within Monte Carlo calculations of simple models of molecular liquids is hampered, relative to its inclusion within molecular dynamics calculations, by the need to fully determine the variables that specify the electronic configuration every time each molecule is moved, i.e., N times per cycle, rather than once per cycle. Classical statistical mechanical...

متن کامل

Solvent effects on the UV-visible absorption spectrum of benzophenone in water: a combined Monte Carlo quantum mechanics study including solute polarization.

The entire ultraviolet-visible absorption spectrum of benzophenone in water is studied and compared with the same spectrum in gas phase. Five transitions are considered, and the corresponding solvatochromic shifts are obtained and compared to experiment. Using a sequential procedure of Monte Carlo simulations and quantum mechanical calculations, liquid configurations were generated and an avera...

متن کامل

First Principles Methods: A Perspective from Quantum Monte Carlo

Quantum Monte Carlo methods are among the most accurate algorithms for predicting properties of general quantum systems. We briefly introduce ground state, path integral at finite temperature and coupled electron-ion Monte Carlo methods, their merits and limitations. We then discuss recent calculations using these methods for dense liquid hydrogen as it undergoes a molecular/atomic (metal/insul...

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

برای دانلود 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

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2003