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Updated: Mar 29, 2026

A Novel Technique for Raman Analysis of Highly Radioactive Samples Using Any Standard Micro-Raman Spectrometer
Published on: April 12, 2017
Simulations of Raman Spectra Using the Fragment Molecular Orbital Method
Hiroya Nakata1,2,3, Dmitri G Fedorov4, Satoshi Yokojima2,5
1Department of Biomolecular Engineering, Tokyo Institute of Technology , 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8501, Japan.
Abstract:
We developed an approach to calculate normal Raman activities based on the fragment molecular orbital method. For this purpose, we derived the FMO gradient and coupled-perturbed Hartree-Fock equations in the presence of the static electric field. The accuracy is evaluated in comparison with full ab initio calculations for a set of closed-shell and radical systems. We applied the method to calculate Raman and IR spectra of a polystyrene oligomer and crambin (PDB: 1CRN ) and performed an assignment of peaks based on localized normal modes. The computational timings demonstrate the efficiency of the method.
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