Synthesis of New Liquid Crystalline Diglycidyl Ethers
The phenolic Schiff bases I–VI were synthesized by condensation reactions between various diamines, namely o-dianisidine, o-tolidine and ethylenediamine with vanillin or p-hydroxybenzaldehyde and subsequent reactions between these phenolic Schiff bases and epichlorohydrin to produce new diglycidyl e...
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| Format: | Article |
| Language: | English |
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MDPI AG
2012-01-01
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| Series: | Molecules |
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| Online Access: | http://www.mdpi.com/1420-3049/17/1/645/ |
| _version_ | 1818175204455612416 |
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| author | Issam Ahmed Mohammed Rashidah Mohamed Hamidi |
| author_facet | Issam Ahmed Mohammed Rashidah Mohamed Hamidi |
| author_sort | Issam Ahmed Mohammed |
| collection | DOAJ |
| description | The phenolic Schiff bases I–VI were synthesized by condensation reactions between various diamines, namely o-dianisidine, o-tolidine and ethylenediamine with vanillin or p-hydroxybenzaldehyde and subsequent reactions between these phenolic Schiff bases and epichlorohydrin to produce new diglycidyl ethers Ia–VIa. The structures of these compounds were confirmed by CHN, FT-IR, 1H-NMR, and 13C-NMR spectroscopy. Their thermotropic liquid crystalline behavior was studied using differential scanning calorimetry (DSC) and polarizing optical microscopy (POM). All the diglycidyl ethers prepared exhibit nematic mesophases, except for Va and VIa, which did not show any transition mesophases, but simply flow to liquids. |
| first_indexed | 2024-12-11T19:56:35Z |
| format | Article |
| id | doaj.art-415cc28042f14bb5b79e841a1ed5f939 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-12-11T19:56:35Z |
| publishDate | 2012-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-415cc28042f14bb5b79e841a1ed5f9392022-12-22T00:52:38ZengMDPI AGMolecules1420-30492012-01-0117164565610.3390/molecules17010645Synthesis of New Liquid Crystalline Diglycidyl EthersIssam Ahmed MohammedRashidah Mohamed HamidiThe phenolic Schiff bases I–VI were synthesized by condensation reactions between various diamines, namely o-dianisidine, o-tolidine and ethylenediamine with vanillin or p-hydroxybenzaldehyde and subsequent reactions between these phenolic Schiff bases and epichlorohydrin to produce new diglycidyl ethers Ia–VIa. The structures of these compounds were confirmed by CHN, FT-IR, 1H-NMR, and 13C-NMR spectroscopy. Their thermotropic liquid crystalline behavior was studied using differential scanning calorimetry (DSC) and polarizing optical microscopy (POM). All the diglycidyl ethers prepared exhibit nematic mesophases, except for Va and VIa, which did not show any transition mesophases, but simply flow to liquids.http://www.mdpi.com/1420-3049/17/1/645/synthesisdiglycidyl etherschiff baseliquid crystal |
| spellingShingle | Issam Ahmed Mohammed Rashidah Mohamed Hamidi Synthesis of New Liquid Crystalline Diglycidyl Ethers Molecules synthesis diglycidyl ether schiff base liquid crystal |
| title | Synthesis of New Liquid Crystalline Diglycidyl Ethers |
| title_full | Synthesis of New Liquid Crystalline Diglycidyl Ethers |
| title_fullStr | Synthesis of New Liquid Crystalline Diglycidyl Ethers |
| title_full_unstemmed | Synthesis of New Liquid Crystalline Diglycidyl Ethers |
| title_short | Synthesis of New Liquid Crystalline Diglycidyl Ethers |
| title_sort | synthesis of new liquid crystalline diglycidyl ethers |
| topic | synthesis diglycidyl ether schiff base liquid crystal |
| url | http://www.mdpi.com/1420-3049/17/1/645/ |
| work_keys_str_mv | AT issamahmedmohammed synthesisofnewliquidcrystallinediglycidylethers AT rashidahmohamedhamidi synthesisofnewliquidcrystallinediglycidylethers |