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• W2897827449 abstract "In this work an approach to investigate the properties of strongly localized vibrational modes of functional groups in bulk material and on solid‐state surfaces is presented. The associated normal mode vectors are approximated solely on the basis of structural information and obtained via diagonalization of a reduced Hessian. The grid‐based Numerov procedure in one and two dimensions is then applied to an adequate scan of the respective potential surface yielding the associated vibrational wave functions and energy eigenvalues. This not only provides a detailed description of anharmonic effects but also an accurate inclusion of the coupling between the investigated vibrational states on a quantum mechanical level. All results obtained for the constructed normal modes are benchmarked against their analytical counterparts obtained from the diagonalization of the total Hessian of the entire system. Three increasingly complex systems treated at quantum chemical level of theory have been considered, namely the symmetric and asymmetric stretch vibrations of an isolated water molecule, hydroxyl groups bound to the surface of GeO 2 (001), α ‐quartz(001) and Rutil (001) as well as crystalline Li 2 NH serving as an example for a bulk material. While the data obtained for the individual systems verify the applicability of the proposed methodology, comparison to experimental data demonstrates the accuracy of this methodology despite the restriction to limit this methodology to a few selected vibrational modes. The possibility to investigate vibrational phenomena of localized normal modes without the requirement of executing costly harmonic frequency calculations of the entire system enables the application of this method to cases in which the determination of normal modes is prohibitively expensive or not available for a particular level of theory. © 2018 Wiley Periodicals, Inc." @default.
• W2897827449 created "2018-10-26" @default.
• W2897827449 creator A5023582637 @default.
• W2897827449 creator A5023889803 @default.
• W2897827449 creator A5088292814 @default.
• W2897827449 date "2018-10-05" @default.
• W2897827449 modified "2023-09-25" @default.
• W2897827449 title "Probing vibrational coupling via a grid‐based quantum approach—an efficient strategy for accurate calculations of localized normal modes in solid‐state systems" @default.
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• W2897827449 doi "https://doi.org/10.1002/jcc.25533" @default.
• W2897827449 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6767160" @default.
• W2897827449 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30341952" @default.
• W2897827449 hasPublicationYear "2018" @default.
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