Polytypes and planar defects revealed in the purine base xanthine using multi-dimensional electron diffraction.
Saved in:
| Title: | Polytypes and planar defects revealed in the purine base xanthine using multi-dimensional electron diffraction. |
|---|---|
| Authors: | Leung, Helen W., Copley, Royston C. B., Lampronti, Giulio I., Day, Sarah J., Saunders, Lucy K., Johnstone, Duncan N., Midgley, Paul A. |
| Source: | Communications Chemistry; 11/5/2025, Vol. 8 Issue 1, p1-10, 10p |
| Abstract: | Layered crystal structures are commonly found across organic and inorganic material systems. When in-plane atomic arrangement remains (nearly) identical, a stacking variation of these layers may result in twinning, planar disorder, or polytypes, a form of polymorphism derived from altering stacking sequences. In this work, we use multi-dimensional electron diffraction (ED) modalities to explore the microstructure of xanthine, an archetypal purine base with a layered crystal structure. Firstly, we identify and characterise the twin operator relating domains of Form I xanthine. We then solve the structure of a new xanthine polymorph, revealing that it is a polytype of Form I. Finally, interfaces between twin and polytype domains are visualised, whilst streaking in the diffraction patterns reveals the presence of planar disorder. Given these observations in the xanthine system, this work suggests that disorder on the nanoscale may be a commonly occurring phenomenon in layered organic molecular crystals. Layered crystal structures often exhibit twinning, planar disorder, or polytypes due to stacking variations. Here, the authors use multi-dimensional electron diffraction to uncover nanoscale disorder in xanthine, identifying a new polymorph and visualizing interfaces, suggesting such disorder may be prevalent in layered organic molecular crystals. [ABSTRACT FROM AUTHOR] |
| Copyright of Communications Chemistry is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Complementary Index |
Full Text 
Full Text Finder 
Nájsť tento článok vo Web of Science Be the first to leave a comment!