Induced Nematic Phase of New Synthesized Laterally Fluorinated Azo/Ester Derivatives
A new series of laterally fluorinated mesomorphic compounds, namely 2-fluoro-4-((4-(alkyloxy)phenyl)diazenyl)phenyl 4-substitutedbenzoate (<b>In<sub>x</sub></b>) were prepared and evaluated for their mesophase behavior. The synthesized series constitutes five members that pos...
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MDPI AG
2021-07-01
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| author | Fowzia S. Alamro Hoda A. Ahmed Mohamed A. El-Atawy Salma A. Al-Zahrani Alaa Z. Omar |
| author_facet | Fowzia S. Alamro Hoda A. Ahmed Mohamed A. El-Atawy Salma A. Al-Zahrani Alaa Z. Omar |
| author_sort | Fowzia S. Alamro |
| collection | DOAJ |
| description | A new series of laterally fluorinated mesomorphic compounds, namely 2-fluoro-4-((4-(alkyloxy)phenyl)diazenyl)phenyl 4-substitutedbenzoate (<b>In<sub>x</sub></b>) were prepared and evaluated for their mesophase behavior. The synthesized series constitutes five members that possess different terminally attached polar groups (X). Their molecular structures were confirmed by elemental analyses and both FT-IR and NMR spectroscopy. Examination of the prepared derivatives was conducted via experimental and theoretical tools. Mesomorphic investigations were carried by polarized optical microscopy (POM) and differential scanning calorimetry (DSC). DSC and POM measurements indicated that except for the un-substituted analogue, all other derivatives were purely nematogenic, possessing their nematic (N) mesophase enantiotropically. This is to say that insertions of terminal polar substituents on their mesogenic structures induced the N phase. In addition, the location of lateral and terminal polar moieties played a considerable role in achieving good thermal N stability. Computational calculations were investigated to determine the deduced optimized molecular structures. Theoretical data indicated that both size and polarity of the terminal substituent (X) have essential impact on the thermal parameters and optical properties of possible geometries. |
| first_indexed | 2024-03-10T09:11:10Z |
| format | Article |
| id | doaj.art-74afe902be5a4048a748aa21068b8cf6 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-10T09:11:10Z |
| publishDate | 2021-07-01 |
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| spelling | doaj.art-74afe902be5a4048a748aa21068b8cf62023-11-22T05:59:43ZengMDPI AGMolecules1420-30492021-07-012615454610.3390/molecules26154546Induced Nematic Phase of New Synthesized Laterally Fluorinated Azo/Ester DerivativesFowzia S. Alamro0Hoda A. Ahmed1Mohamed A. El-Atawy2Salma A. Al-Zahrani3Alaa Z. Omar4Department of Chemistry, College of Science, Princess Nourah bint Abdulrahman University, Riyadh 11671, Saudi ArabiaDepartment of Chemistry, Faculty of Science, Cairo University, Cairo 12613, EgyptChemistry Department, Faculty of Science, Taibah University, Yanbu 46423, Saudi ArabiaDepartment of Chemistry, College of Sciences, University of Ha’il, Ha’il 2440, Saudi ArabiaChemistry Department, Faculty of Science, Alexandria University, P.O. Box 426 Ibrahemia, Alexandria 21321, EgyptA new series of laterally fluorinated mesomorphic compounds, namely 2-fluoro-4-((4-(alkyloxy)phenyl)diazenyl)phenyl 4-substitutedbenzoate (<b>In<sub>x</sub></b>) were prepared and evaluated for their mesophase behavior. The synthesized series constitutes five members that possess different terminally attached polar groups (X). Their molecular structures were confirmed by elemental analyses and both FT-IR and NMR spectroscopy. Examination of the prepared derivatives was conducted via experimental and theoretical tools. Mesomorphic investigations were carried by polarized optical microscopy (POM) and differential scanning calorimetry (DSC). DSC and POM measurements indicated that except for the un-substituted analogue, all other derivatives were purely nematogenic, possessing their nematic (N) mesophase enantiotropically. This is to say that insertions of terminal polar substituents on their mesogenic structures induced the N phase. In addition, the location of lateral and terminal polar moieties played a considerable role in achieving good thermal N stability. Computational calculations were investigated to determine the deduced optimized molecular structures. Theoretical data indicated that both size and polarity of the terminal substituent (X) have essential impact on the thermal parameters and optical properties of possible geometries.https://www.mdpi.com/1420-3049/26/15/4546phase behaviourlateral fluorineinduced nematic phaseoptimize structureDFT |
| spellingShingle | Fowzia S. Alamro Hoda A. Ahmed Mohamed A. El-Atawy Salma A. Al-Zahrani Alaa Z. Omar Induced Nematic Phase of New Synthesized Laterally Fluorinated Azo/Ester Derivatives Molecules phase behaviour lateral fluorine induced nematic phase optimize structure DFT |
| title | Induced Nematic Phase of New Synthesized Laterally Fluorinated Azo/Ester Derivatives |
| title_full | Induced Nematic Phase of New Synthesized Laterally Fluorinated Azo/Ester Derivatives |
| title_fullStr | Induced Nematic Phase of New Synthesized Laterally Fluorinated Azo/Ester Derivatives |
| title_full_unstemmed | Induced Nematic Phase of New Synthesized Laterally Fluorinated Azo/Ester Derivatives |
| title_short | Induced Nematic Phase of New Synthesized Laterally Fluorinated Azo/Ester Derivatives |
| title_sort | induced nematic phase of new synthesized laterally fluorinated azo ester derivatives |
| topic | phase behaviour lateral fluorine induced nematic phase optimize structure DFT |
| url | https://www.mdpi.com/1420-3049/26/15/4546 |
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