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Halogen-bonding complexes based on bis(iodoethynyl)benzene units: A new versatile route to supramolecular materials

AuthorsGonzález, Lucía; Gimeno, Nélida; Tejedor, Rosa M.; Polo, Víctor; Ros, M. Blanca; Uriel, Santiago; Serrano, José Luis
KeywordsSupramolecular materials
Liquid crystals
Halogen bonding
Issue Date2013
PublisherAmerican Chemical Society
CitationChemistry of Materials 25(22): 4503-4510 (2013)
AbstractIodoalkynes [1,4-bis(iodoethynyl)benzene (p-BIB) and 1,3-bis(iodoethynyl) benzene (m-BIB)] have been used successfully to prepare halogen bonding complexes with a range of 4-pyridine derivatives showing liquid crystalline organizations. The trimeric halogen-bonded complexes obtained from p-BIB have a rod-like structure and exhibited high order calamitic phases (SmB and G). In contrast, m-BIB gives rise to bent-shaped structures that display SmAP-like mesophases. Furthermore it was found that the presence of three and five aromatic rings in these halogen-bonding complexes promotes calamitic mesophases while seven rings are required to stabilize bent-core mesophases. The formation of halogen bonding in the complexes was confirmed by several techniques, including FT-IR, XPS, and single crystal X-ray diffraction and the strength of the bonds was evaluated by DFT calculations © 2013 American Chemical Society.
Identifiersdoi: 10.1021/cm401849f
issn: 0897-4756
e-issn: 1520-5002
Appears in Collections:(ICMA) Artículos
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