Synthesis, Optical Characterizations and Solar Energy Applications of New Schiff Base Materials
A new set of laterally OCH<sub>3</sub>-substituted photoactive liquid crystalline analogues, 4-hexyloxy phenyl- imino-4ʹ-(3-methoxyphenyl)-4ʹ’-alkoxybenzoates, were synthesized and investigated for their mesomorphic behavior. The prepared set constitutes five analogues that differ from e...
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2021-07-01
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| author | Sobhi M. Gomha Hoda A. Ahmed Mohamed Shaban Tariq Z. Abolibda Muna S. Khushaim Khalid A. Alharbi |
| author_facet | Sobhi M. Gomha Hoda A. Ahmed Mohamed Shaban Tariq Z. Abolibda Muna S. Khushaim Khalid A. Alharbi |
| author_sort | Sobhi M. Gomha |
| collection | DOAJ |
| description | A new set of laterally OCH<sub>3</sub>-substituted photoactive liquid crystalline analogues, 4-hexyloxy phenyl- imino-4ʹ-(3-methoxyphenyl)-4ʹ’-alkoxybenzoates, were synthesized and investigated for their mesomorphic behavior. The prepared set constitutes five analogues that differ from each other by the terminally attached compact polar group. Characterization of the synthesized derivatives is conducted using differential scanning calorimetry (DSC), polarized optical microscopy (POM), and UV-spectroscopy. Molecular structures were elucidated by elemental analyses, FT-IR and NMR spectroscopy. DSC and POM investigations indicated that all the prepared derivatives are monomorphic possessing the nematic (N) phase, except for the unsubstituted derivative that is nonmesomorphic. On the other side, the photophysical study and the optical spectra measurements confirm the photoactivity of the present compounds under UV/visible irradiation. The measured optical spectra showed impressive enhancement in the optical absorption and reduction in the optical bandgap from 3.63 to 3.0 eV depending on the terminal group. From the study of the DC electric properties, the lowest resistance, 106.5 GΩ at scan rate 0.1 V/s, was observed for the <b>I6<sub>d</sub></b> film with Cl terminal, which decreased to 49.5 GΩ by increasing the scan rate to 0.5 V/s. Moreover, the electrical conductance is decreased from 9.39 pS to 1.35 pS at scan rate 0.1 V/s by changing the terminal group from Cl to F. The enhanced optical absorption and the reduced energy gap make the optimized samples suitable material for solar energy applications. |
| first_indexed | 2024-03-10T09:50:30Z |
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| id | doaj.art-0e4c841c90f344499bdcc2a27b35d7c7 |
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| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T09:50:30Z |
| publishDate | 2021-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-0e4c841c90f344499bdcc2a27b35d7c72023-11-22T02:44:48ZengMDPI AGMaterials1996-19442021-07-011413371810.3390/ma14133718Synthesis, Optical Characterizations and Solar Energy Applications of New Schiff Base MaterialsSobhi M. Gomha0Hoda A. Ahmed1Mohamed Shaban2Tariq Z. Abolibda3Muna S. Khushaim4Khalid A. Alharbi5Chemistry Department, Faculty of Science, Islamic University in Almadinah Almonawara, Almadinah Almonawara 42351, Saudi ArabiaDepartment of Chemistry, Faculty of Science, Cairo University, Cairo 12613, EgyptDepartment of Physics, Faculty of Science, Islamic University in Almadinah Almonawara, Almadinah 42351, Saudi ArabiaChemistry Department, Faculty of Science, Islamic University in Almadinah Almonawara, Almadinah Almonawara 42351, Saudi ArabiaDepartment of Physics, Faculty of Science, Taibah University, P.O. Box 30002, Al-Madina 41447, Saudi ArabiaChemistry Department, Faculty of Science, Islamic University in Almadinah Almonawara, Almadinah Almonawara 42351, Saudi ArabiaA new set of laterally OCH<sub>3</sub>-substituted photoactive liquid crystalline analogues, 4-hexyloxy phenyl- imino-4ʹ-(3-methoxyphenyl)-4ʹ’-alkoxybenzoates, were synthesized and investigated for their mesomorphic behavior. The prepared set constitutes five analogues that differ from each other by the terminally attached compact polar group. Characterization of the synthesized derivatives is conducted using differential scanning calorimetry (DSC), polarized optical microscopy (POM), and UV-spectroscopy. Molecular structures were elucidated by elemental analyses, FT-IR and NMR spectroscopy. DSC and POM investigations indicated that all the prepared derivatives are monomorphic possessing the nematic (N) phase, except for the unsubstituted derivative that is nonmesomorphic. On the other side, the photophysical study and the optical spectra measurements confirm the photoactivity of the present compounds under UV/visible irradiation. The measured optical spectra showed impressive enhancement in the optical absorption and reduction in the optical bandgap from 3.63 to 3.0 eV depending on the terminal group. From the study of the DC electric properties, the lowest resistance, 106.5 GΩ at scan rate 0.1 V/s, was observed for the <b>I6<sub>d</sub></b> film with Cl terminal, which decreased to 49.5 GΩ by increasing the scan rate to 0.5 V/s. Moreover, the electrical conductance is decreased from 9.39 pS to 1.35 pS at scan rate 0.1 V/s by changing the terminal group from Cl to F. The enhanced optical absorption and the reduced energy gap make the optimized samples suitable material for solar energy applications.https://www.mdpi.com/1996-1944/14/13/3718lateral methoxy schiff base/esteroptical propertiesmesophase stabilityphotophysicalsolar energyelectrical properties |
| spellingShingle | Sobhi M. Gomha Hoda A. Ahmed Mohamed Shaban Tariq Z. Abolibda Muna S. Khushaim Khalid A. Alharbi Synthesis, Optical Characterizations and Solar Energy Applications of New Schiff Base Materials Materials lateral methoxy schiff base/ester optical properties mesophase stability photophysical solar energy electrical properties |
| title | Synthesis, Optical Characterizations and Solar Energy Applications of New Schiff Base Materials |
| title_full | Synthesis, Optical Characterizations and Solar Energy Applications of New Schiff Base Materials |
| title_fullStr | Synthesis, Optical Characterizations and Solar Energy Applications of New Schiff Base Materials |
| title_full_unstemmed | Synthesis, Optical Characterizations and Solar Energy Applications of New Schiff Base Materials |
| title_short | Synthesis, Optical Characterizations and Solar Energy Applications of New Schiff Base Materials |
| title_sort | synthesis optical characterizations and solar energy applications of new schiff base materials |
| topic | lateral methoxy schiff base/ester optical properties mesophase stability photophysical solar energy electrical properties |
| url | https://www.mdpi.com/1996-1944/14/13/3718 |
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