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Stevens, JS, Seabourne, CR, Jaye, C et al. (3 more authors) (2014) Incisive probing of intermolecular interactions in molecular crystals: core level spectroscopy combined with density functional theory. Journal of Physical Chemistry B Materials, 118 (42). pp. 12121-12129. ISSN 1520-6106
Abstract
The α-form of crystalline para-aminobenzoic acid (PABA) has been examined as a model system for demonstrating how the core level spectroscopies X-ray photoelectron spectroscopy (XPS) and near-edge X-ray absorption fine-structure (NEXAFS) can be combined with CASTEP density functional theory (DFT) to provide reliable modeling of intermolecular bonding in organic molecular crystals. Through its dependence on unoccupied valence states NEXAFS is an extremely sensitive probe of variations in intermolecular bonding. Prediction of NEXAFS spectra by CASTEP, in combination with core level shifts predicted by WIEN2K, reproduced experimentally observed data very well when all significant intermolecular interactions were correctly taken into account. CASTEP-predicted NEXAFS spectra for the crystalline state were compared with those for an isolated PABA monomer to examine the impact of intermolecular interactions and local environment in the solid state. The effects of the loss of hydrogen-bonding in carboxylic acid dimers and intermolecular hydrogen bonding between amino and carboxylic acid moieties are evident, with energy shifts and intensity variations of NEXAFS features arising from the associated differences in electronic structure and bonding.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2014 American Chemical Society. This is an open access article published under a Creative Commons Attribution (CC-BY) License, which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 06 May 2015 11:35 |
Last Modified: | 28 Jun 2019 14:07 |
Published Version: | http://dx.doi.org/10.1021/jp506983s |
Status: | Published |
Publisher: | American Chemical Society |
Identification Number: | 10.1021/jp506983s |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:85725 |
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Incisive probing of intermolecular interactions in molecular crystals: core level spectroscopy combined with density functional theory. (deposited 12 Jan 2015 14:54)
- Incisive probing of intermolecular interactions in molecular crystals: core level spectroscopy combined with density functional theory. (deposited 06 May 2015 11:35) [Currently Displayed]