Synthesis, characterization and liquid crystalline properties of a series of hydroxybiphenyl benzoate and biphenyl bis(benzoate)
| Autor: | S. M. Saiful Islam, Muhammad Younus, Ashikur Rahman Rabbi, Sudip Choudhury, Md. Kausar Ahmed, Bimal B. Chakraborty, Shamim Ahmed, Md. Mostafizur Rahman, Nasim Sultana, Salhed Ahmed |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Biphenyl
Chemistry 02 engineering and technology Nuclear magnetic resonance spectroscopy 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Medicinal chemistry Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials chemistry.chemical_compound Differential scanning calorimetry Elemental analysis Liquid crystal Materials Chemistry Alkoxy group Organic chemistry Physical and Theoretical Chemistry 0210 nano-technology Chirality (chemistry) Spectroscopy Dichloromethane |
| Zdroj: | Journal of Molecular Liquids. 224:265-273 |
| ISSN: | 0167-7322 |
| DOI: | 10.1016/j.molliq.2016.10.002 |
| Popis: | Two series of hydroxybiphenyl benzoate 2a–2c and biphenyl bis(benzoate) 3a–3c have been synthesized by the esterification reaction of 4-alkoxybenzoic acid 1a–c with 1,1′-biphenyl-4,4′-diol in presence of DCC and DMAP in dichloromethane at room temperature under nitrogen atmosphere. Products ratio (2 vs 3) were not significantly influenced with the variation of alkoxy substituents. The newly synthesized ester products were characterized by IR and NMR spectroscopy as well as elemental analysis. The transition temperatures and mesophases have been investigated by differential scanning calorimetry and polarized optical microscopy. Although the synthesized ester derivatives, 3a–c are achiral, molecular chirality is exhibited in their mesophases. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect