Characterizing the Structure of Organic Molecules of Intrinsic Microporosity by Molecular Simulations and X-ray Scattering

Lauren J. Abbott, Amanda G. McDermott, Annalaura Del Regno, Rupert G. D. Taylor, C. Grazia Bezzu, Kadhum J. Msayib, Neil B. McKeown, Flor R. Siperstein, James Runt, Coray M. Colina*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

The design of a new class of materials, called organic molecules of intrinsic microporosity (OMIMs), incorporates awkward, concave shapes to prevent efficient packing of molecules, resulting in microporosity. This work presents predictive molecular simulations and experimental wide-angle X-ray scattering (WAXS) for a series of biphenyl-core OMIMs with varying end-group geometries. Development of the utilized simulation protocol was based on comparison of several simulation methods to WAXS patterns. In addition, examination of the simulated structures has facilitated the assignment of WAXS features to specific intra-and intermolecular distances, making this a useful tool for characterizing the packing behavior of this class of materials. Analysis of the simulations suggested that OMIMs had greater microporosity when the molecules were the most shape-persistent, which required rigid structures and bulky end groups. The simulation protocol presented here allows for predictive, presynthesis screening of OMIMs and similar complex molecules to enhance understanding of their structures and aid in future design efforts.

Original languageEnglish
Pages (from-to)355-364
Number of pages10
JournalJournal of Physical Chemistry B (Soft Condensed Matter and Biophysical Chemistry)
Issue number1
Publication statusPublished - 10 Jan 2013

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