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Origin of the Monolayer and Bilayer Arrangement in Smectic A and C Mesophases and Nematic Cybotactic Domains: The Case Study of Benzyloxy-Terminated Isoxazole Liquid Crystals by Luana D. Lopes; Leonardo P. Pavan; Itamar L. Gonçalves; Paulo F. B. Goncalves; Francisco P. dos Santos; Adailton João Bortoluzzi; Fabrício Luiz Faita; Rafaela R. da Rosa; Aloir Antonio Merlo is a Materials Science article available to read on EtoBox.
What is Origin of the Monolayer and Bilayer Arrangement in Smectic A and C Mesophases and Nematic Cybotactic Domains: The Case Study of Benzyloxy-Terminated Isoxazole Liquid Crystals about?
The synthesis and characterization of two benzyloxy-terminated isoxazole liquid crystals, (ILCs) 7a (n-octyl) and 7b (n-decyl), are described. The synthesis of the fivemembered isoxazole ring was based on the (3 + 2) 1,3-dipolar cycloaddition to furnish the isoxazoline cycloadduct and the subsequent MnO 2 -oxidation. The liquid crystal (LC) behavior was accomplished by polarized optical microscopy (POM), differential scanning calorimetry, single-crystal X-ray diffraction, X-ray diffraction (XRD), 7-lithium nuclear magnetic resonance ( 7 Li-NMR), and density functional theory (DFT) calculations. For both ILCs, the nematic cybotactic (Ncyb) and smectic A and C mesophases were characterized. Two organizational monolayer and bilayer regimes for the smectic A and C mesophases were characterized by the XRD pattern, and the Ncyb mesophase was assigned by the analysis of the low intensity of the peak at 2θ = 2.70°, suggesting some smectic character for the nematic mesophase. A correlation length (ξ) of around 20 layers and 7 layers was established by XRD for the monolayer and bilayer organization in the SmC mesophase. Single-crystal XRD, 7 Li-NMR experiments, and DFT calculations were perf
Who reads Origin of the Monolayer and Bilayer Arrangement in Smectic A and C Mesophases and Nematic Cybotactic Domains: The Case Study of Benzyloxy-Terminated Isoxazole Liquid Crystals?
It is typically read by researchers, students, and practitioners in Materials Science.
- Author
- Luana D. Lopes; Leonardo P. Pavan; Itamar L. Gonçalves; Paulo F. B. Goncalves; Francisco P. dos Santos; Adailton João Bortoluzzi; Fabrício Luiz Faita; Rafaela R. da Rosa; Aloir Antonio Merlo
- Publisher
- American Chemical Society (ACS)
- Published
- 2023
- Language
- EN
- Field
- Materials Science (Physical Sciences)