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- W2576881883 abstract "The range of unit cell orientations generated at the kink of a bent single crystal poses unsurmountable challenges with diffraction analysis and limits the insight into the molecular-scale mechanism of bending. On a plastically bent crystal of hexachlorobenzene, it is demonstrated here that spatially resolved microfocus infrared spectroscopy using synchrotron radiation can be applied in conjunction with periodic density functional theory calculations to predict spectral changes or to extract information on structural changes that occur as a consequence of bending. The approach reproduces well the observed trends, such as the wall effects, and provides estimations of the vibrational shifts, unit cell deformations, and intramolecular parameters. Generally, expansion of the lattice induces red-shift while compression induces larger blue-shift of the characteristic ν(C-C) and ν(C-Cl) modes. Uniform or non-uniform expansion or contraction of the unit cell of 0.1 Å results in shifts of several cm-1, whereas deformation of the cell of 0.5° at the unique angle causes shifts of <0.5 cm-1. Since this approach does not include parameters related to the actual stimulus by which the deformation has been induced, it can be generalized and applied to other mechanically, photochemically, or thermally bent crystals." @default.
- W2576881883 created "2017-01-26" @default.
- W2576881883 creator A5001482734 @default.
- W2576881883 creator A5019786142 @default.
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- W2576881883 creator A5090295400 @default.
- W2576881883 date "2017-02-06" @default.
- W2576881883 modified "2023-10-05" @default.
- W2576881883 title "Probing Structural Perturbation in a Bent Molecular Crystal with Synchrotron Infrared Microspectroscopy and Periodic Density Functional Theory Calculations" @default.
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- W2576881883 doi "https://doi.org/10.1021/jacs.6b11212" @default.
- W2576881883 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/28075578" @default.
- W2576881883 hasPublicationYear "2017" @default.
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