Synthesis and thermotropic liquid-crystalline properties of a hexyloxy-substituted pyridyl-ethynylene-azobenzene and its halogen-bonded complex with tetrafluoroiodophenyl decanoate
| Autor: | Leticia Larios-López, Liliette Barcelona-Cazanave, Nayely Trejo-Carbajal, José Manuel Mata-Padilla, Dámaso Navarro-Rodríguez, Isaura Felix-Serrano, Rosa Julia Rodríguez-González |
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| Rok vydání: | 2021 |
| Předmět: |
010405 organic chemistry
Mesogen Organic Chemistry Stacking 010402 general chemistry Electrostatics 01 natural sciences Biochemistry Thermotropic crystal 0104 chemical sciences Inorganic Chemistry chemistry.chemical_compound Crystallography Azobenzene chemistry Halogen Environmental Chemistry Molecule Lamellar structure Physical and Theoretical Chemistry |
| Zdroj: | Journal of Fluorine Chemistry. 244:109739 |
| ISSN: | 0022-1139 |
| Popis: | This work deals with the synthesis and thermotropic behavior of a hexyloxy-substituted pyridyl-ethynylene-azobenzene and its halogen-bonded complex (XB complex) with tetrafluoroiodophenyl decanoate. The XB complex here reported is a highly anisotropic photoactive mesogen. It displays only smectic-type order where two different lamellar stacks seem to co-exist. The smectic period (determined by XRD) shorter than the theoretical length of the XB-complex suggests a single layer stacking of molecules, which may be arranged head-to-tail to satisfy the electrostatic interactions between fluorinated and non-fluorinated rings. Finally, photo-isomerization and NMR experiments seem indicate that the halogen-bonded complex is stable in solution. |
| Databáze: | OpenAIRE |
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