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• W2891110378 startingPage "3116" @default.
• W2891110378 abstract "Abstract The pharmaceutical industry is in need of new techniques to identify the chirality of solids due to regulatory and safety concerns regarding the biological activity of enantiomers. In this study, we present for the first time the application of low‐frequency Raman spectroscopy as a new and sensitive method for analyzing the chiral purity of crystals. Using this method, we were able to identify small amounts, as low as 1 % w/w, of an enantiomer in racemic crystals. To demonstrate the capabilities of the method, we used a model system based on chiral crystals of enantiopure, racemic crystals and their mixtures in various ratios. We found that the low‐frequency Raman spectra of racemic and enantiopure crystals are significantly different, reflecting the different hydrogen bond networks. Moreover, a comparison of the sensitivity of enantiomeric excess in chiral crystals to that of circular dichroism and X‐ray diffraction measurements showed that low‐frequency Raman attains high sensitivity comparable to chiral optical methods used for solutions. Overall, our proposed approach of using Raman spectroscopy for determining enantiomeric excess in crystals is simple, fast, and offers a high degree of chiral sensitivity." @default.
• W2891110378 created "2018-09-27" @default.
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• W2891110378 date "2018-10-04" @default.
• W2891110378 modified "2023-10-11" @default.
• W2891110378 title "Chiral Purity of Crystals Using Low-Frequency Raman Spectroscopy" @default.
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• W2891110378 doi "https://doi.org/10.1002/cphc.201800739" @default.
• W2891110378 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30178918" @default.
• W2891110378 hasPublicationYear "2018" @default.
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