Issue 45, 2022

Linear response properties of solvated systems: a computational study

Abstract

We present a computational study of static and dynamic linear polarizabilities in solution. We use different theoretical approaches to describe solvent effects, ranging from quantum mechanics/molecular mechanics (QM/MM) to quantum embedding approaches. In particular, we consider non-polarizable and polarizable QM/MM methods, the latter based on the fluctuating charge (FQ) force field. In addition, we use a quantum embedding method defined in the context of multilevel Hartree–Fock (MLHF), where the system is divided into active and inactive regions, and combine it with a third layer described by means of the FQ model. The multiscale approaches are then used as reference wave functions for equation-of-motion coupled cluster (EOM-CC) response properties, allowing for the account of electron correlation. The developed models are applied to the calculation of linear response properties of two organic moieties—namely, para-nitroaniline and benzonitrile—in non-aqueous solvents—1,4-dioxane, acetonitrile, and tetrahydrofuran. The computed polarizabilities are then discussed in terms of the physico-chemical solute–solvent interactions described by each method (electrostatic, polarization and Pauli repulsion), and finally compared with the available experimental references.

Graphical abstract: Linear response properties of solvated systems: a computational study

Supplementary files

Article information

Article type
Paper
Submitted
27 Sep 2022
Accepted
03 Nov 2022
First published
04 Nov 2022

Phys. Chem. Chem. Phys., 2022,24, 27866-27878

Linear response properties of solvated systems: a computational study

L. Goletto, S. Gómez, J. H. Andersen, H. Koch and T. Giovannini, Phys. Chem. Chem. Phys., 2022, 24, 27866 DOI: 10.1039/D2CP04512E

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