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Abstract
Two new families of dimeric borondifluoride complexes derived from β-enaminoketones containing terminal phenyl and naphthalenyl groups were prepared, and their mesomorphic and optical properties investigated. One single crystallographic structure of mesogenic complex 1a-BF2 (n = 12) was determined by X-ray analysis; it crystallises in a monoclinic space group P21/c and the geometry on boron atoms was all tetrahedral. The crystal was considered as linear-shaped with a length of ~51.95 Å. A relatively large dihedral angle of ~38.85° between the central phenyl spacer and tetrahedral BF2 moiety was observed. Mesomorphic properties were crucially impacted by the structure of the central spacer and terminal group; all bis(borondifluoride) complexes formed SmC or SmA phase except complexes 1b-BF2 (m = 2, 3) and 1c-BF2. H–bond interactions supported by FT-IR spectra were attributed to the induction of SmA phase in compound 2 c-BF2. The optical property of the boron complexes was related with their molecular structures, and they emitted blue-to-green emissions at λmax = 420–538 nm in CH2Cl2. This is the first twin liquid crystal of bis(BF2) complexes derived from Schiff baseβ-enaminoketones.
Original language | English |
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Pages (from-to) | 955-973 |
Number of pages | 19 |
Journal | Liquid Crystals |
Volume | 48 |
Issue number | 7 |
DOIs | |
State | Published - 2021 |
Keywords
- Bis(borondifluoride)
- luminescent
- mesogens
- smectic
- β-enaminoketones
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Dive into the research topics of 'Luminescent mesogenic dimeric borondifluoride complexes'. Together they form a unique fingerprint.Projects
- 1 Finished
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Mesogenic Materials Containing Main Group Borondifluorides
Lai, C.-K. (PI)
1/08/19 → 31/07/20
Project: Research
Datasets
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Luminescent mesogenic dimeric borondifluoride complexes
Leea, G.-H. (Contributor), Lai, C. K. (Contributor), Lei, Z.-Y. (Contributor) & Cai, Y.-H. (Contributor), figshare Academic Research System, 1 Jan 2020
DOI: 10.6084/m9.figshare.13160005.v1, https://doi.org/10.6084%2Fm9.figshare.13160005.v1
Dataset