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Lookup NU author(s): Dr Paul Waddell, Nawaf Algoazy, Dr Julian Knight
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
© The Author(s) 2025.The chiral Boranil dye (LB(O)-Br) exhibits polymorphism forming two distinctly different structures in the solid state. Polymorph I crystallises in the space group I41/a and exhibits C-H‧‧‧O and C-H‧‧‧Br interactions to produce a columnar structure with 3D connectivity. Polymorph II crystallises in P21/c and, in addition to C-H‧‧‧O contacts, forms Br‧‧‧O halogen bonds and edge-to-face π-interactions to give a 2D layered structure. Given the propensity of these compounds to fluoresce in the crystalline state, polymorphism of these structures is an important factor to consider when designing dyes of this kind for solid-state applications.
Author(s): Waddell PG, Algoazy N, Knight JG
Publication type: Article
Publication status: Published
Journal: Journal of Chemical Crystallography
Year: 2026
Volume: 56
Issue: 1
Print publication date: 01/03/2026
Online publication date: 14/11/2025
Acceptance date: 26/08/2025
Date deposited: 25/11/2025
ISSN (print): 1074-1542
ISSN (electronic): 1572-8854
Publisher: Springer
URL: https://doi.org/10.1007/s10870-025-01070-5
DOI: 10.1007/s10870-025-01070-5
Data Access Statement: CCDC 2454814 and 2454815 contain the full crystallographic data for this article. These are available free of charge at [www.ccdc.cam.ac.uk/data_request/cif](http:/www.ccdc.cam.ac.uk/data_request/cif) , by emailing [data_request@ccdc.cam.ac.uk](mailto: data_request@ccdc.cam.ac.uk) or by contacting The Cambridge Crystallographic Data Centre, 12 Union Road, Cambridge, CB2 1EZ, UK; fax: +44 1223 336033.
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