Revisiting Dimorphs of 4‐n‐octyloxybenzoic Acid: Contrasting Mechanical Property and Surface Wettability

4‐n‐octyloxy benzoic acid is known to exhibit liquid crystalline properties, and under normal pressure and temperature conditions, it exists as at least two crystalline polymorphs. We revisited the system and discovered that single crystals of one of the polymorphs display plastic deformation, where...

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Bibliographic Details
Published in:Chemistry, an Asian journal an Asian journal, 2024-03, Vol.19 (6), p.e202301090-n/a
Main Authors: Borah, Silpi S., Khan, Mohsin, Gogoi, Pulakesh, Kalita, Nabadeep, Thakuria, Ranjit, Nath, Naba K.
Format: Article
Language:English
Subjects:
Benzoic acid
Brittleness
Crystal structure
Formability
Liquid crystals
Molecular Crystal
Plastic Deformation
Polymorph
Single crystals
Slip planes
Wettability
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Summary:4‐n‐octyloxy benzoic acid is known to exhibit liquid crystalline properties, and under normal pressure and temperature conditions, it exists as at least two crystalline polymorphs. We revisited the system and discovered that single crystals of one of the polymorphs display plastic deformation, whereas the other is brittle. n‐octyl chains are arranged in an end‐to‐end fashion, forming slip planes in the plastically deformable polymorph, whereas they are interdigitated in the crystal structure of the brittle polymorph. Due to the difference in the arrangement of the −COOH group and alkyl chains, the major faces of the crystals of both polymorphs possess significant differences in the wettability towards moisture. Contrasting mechanical property and surface wettability of the single crystals of concomitant dimorphs of a well‐known mesogen n‐octyloxybenzoic acid is discovered, and structure‐property correlation is established.
ISSN:1861-4728
1861-471X
DOI:10.1002/asia.202301090