Nematogenic Laterally Substituted Supramolecular H-Bonded Complexes Based on Flexible Core
New laterally CH<sub>3</sub>-substituted series of 1:2 hydrogen-bonded supramolecular complexes (HBSMCs) based on flexible acid core were prepared and mesomorphically investigated. Mixtures were formed through H-bonded interactions between adipic acid (A) and 4-(2-(pyridin-4-yl)diazenyl-...
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| Format: | Article |
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MDPI AG
2020-09-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/10/10/878 |
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| author | H.A. Ahmed Muna S. Khushaim |
| author_facet | H.A. Ahmed Muna S. Khushaim |
| author_sort | H.A. Ahmed |
| collection | DOAJ |
| description | New laterally CH<sub>3</sub>-substituted series of 1:2 hydrogen-bonded supramolecular complexes (HBSMCs) based on flexible acid core were prepared and mesomorphically investigated. Mixtures were formed through H-bonded interactions between adipic acid (A) and 4-(2-(pyridin-4-yl)diazenyl-(3-methylphenyl) 4-alkoxybenzoate (Bn). Mesomorphic and optical properties were investigated by differential scanning calorimetry (DSC), polarized optical microscopy (POM), X-ray diffraction (XRD), and UV-spectroscopy. HBSMCs formed from 1:2 mol mixture of A:2Bn, where the base component (B) bearing different alkoxy chain lengths from n = 8 to 14. The new HBSMCs (A/2B) interactions were confirmed by Fermi-bands formation via FT-IR spectroscopy measurements. Results revealed that all prepared HBSMCs are enantiotropic, exhibiting induced nematic (N) phase. The XRD pattern confirmed the POM texture results. Moreover, a comparison was made between the new laterally HBSMC series based on flexible core and the previously analyzed laterally neat complexes. |
| first_indexed | 2024-03-10T15:59:47Z |
| format | Article |
| id | doaj.art-710c7708c0de4a55a4315c31d5153bbe |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-10T15:59:47Z |
| publishDate | 2020-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-710c7708c0de4a55a4315c31d5153bbe2023-11-20T15:23:07ZengMDPI AGCrystals2073-43522020-09-01101087810.3390/cryst10100878Nematogenic Laterally Substituted Supramolecular H-Bonded Complexes Based on Flexible CoreH.A. Ahmed0Muna S. Khushaim1Faculty of Science, Department of Chemistry, Cairo University, Cairo 12613, EgyptDepartment of Physics, Faculty of Science, Taibah University, P. Box: 30002, Al-Madina 41447, Saudi ArabiaNew laterally CH<sub>3</sub>-substituted series of 1:2 hydrogen-bonded supramolecular complexes (HBSMCs) based on flexible acid core were prepared and mesomorphically investigated. Mixtures were formed through H-bonded interactions between adipic acid (A) and 4-(2-(pyridin-4-yl)diazenyl-(3-methylphenyl) 4-alkoxybenzoate (Bn). Mesomorphic and optical properties were investigated by differential scanning calorimetry (DSC), polarized optical microscopy (POM), X-ray diffraction (XRD), and UV-spectroscopy. HBSMCs formed from 1:2 mol mixture of A:2Bn, where the base component (B) bearing different alkoxy chain lengths from n = 8 to 14. The new HBSMCs (A/2B) interactions were confirmed by Fermi-bands formation via FT-IR spectroscopy measurements. Results revealed that all prepared HBSMCs are enantiotropic, exhibiting induced nematic (N) phase. The XRD pattern confirmed the POM texture results. Moreover, a comparison was made between the new laterally HBSMC series based on flexible core and the previously analyzed laterally neat complexes.https://www.mdpi.com/2073-4352/10/10/878lateral-groupsupramolecular H-bonding complexesX-ray diffractioninduced phaseadipic acidflexible core |
| spellingShingle | H.A. Ahmed Muna S. Khushaim Nematogenic Laterally Substituted Supramolecular H-Bonded Complexes Based on Flexible Core Crystals lateral-group supramolecular H-bonding complexes X-ray diffraction induced phase adipic acid flexible core |
| title | Nematogenic Laterally Substituted Supramolecular H-Bonded Complexes Based on Flexible Core |
| title_full | Nematogenic Laterally Substituted Supramolecular H-Bonded Complexes Based on Flexible Core |
| title_fullStr | Nematogenic Laterally Substituted Supramolecular H-Bonded Complexes Based on Flexible Core |
| title_full_unstemmed | Nematogenic Laterally Substituted Supramolecular H-Bonded Complexes Based on Flexible Core |
| title_short | Nematogenic Laterally Substituted Supramolecular H-Bonded Complexes Based on Flexible Core |
| title_sort | nematogenic laterally substituted supramolecular h bonded complexes based on flexible core |
| topic | lateral-group supramolecular H-bonding complexes X-ray diffraction induced phase adipic acid flexible core |
| url | https://www.mdpi.com/2073-4352/10/10/878 |
| work_keys_str_mv | AT haahmed nematogeniclaterallysubstitutedsupramolecularhbondedcomplexesbasedonflexiblecore AT munaskhushaim nematogeniclaterallysubstitutedsupramolecularhbondedcomplexesbasedonflexiblecore |