| 000 | 02585cam a2200349 a 4500 | ||
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| 003 | EG-GiCUC | ||
| 005 | 20250223032306.0 | ||
| 008 | 190523s2018 ua d f m 000 0 eng d | ||
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_aEG-GiCUC _beng _cEG-GiCUC |
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| 041 | 0 | _aeng | |
| 049 | _aDeposite | ||
| 097 | _aM.Sc | ||
| 099 | _aCai01.12.10.M.Sc.2018.Ne.E | ||
| 100 | 0 | _aNesma Emad Mahmoud Mohemed | |
| 245 | 1 | 0 |
_aEffect of including extra phenylazo moiety on the mesophase behavior of three-ring azo/ester molecules / _cNesma Emad Mahmoud Mohemed ; Supervised Abelgawad A. Fahmi , Magdi M. Naoum , Gamal R. Saad |
| 246 | 1 | 5 | _aتأثير ادخال مجموعه الفنيل أزو علي سلوك طور الوسط لمركبات الأزو/ أستر ثلاثيه الحلقة |
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_aCairo : _bNesma Emad Mahmoud Mohemed , _c2018 |
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| 300 |
_a104 P. : _bcharts ; _c25cm |
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| 502 | _aThesis (M.Sc.) - Cairo University - Faculty of Science - Department of Organic Chemistry | ||
| 520 | _aFive homologous series of the four-ring 4-substituted phenylazo phenyl 4'-(4"-alkoxy phenylazo) benzoates (Ina-e) were prepared and their mesophase behavior investigated by differential scanning calorimetry (DSC) and identified by polarized light microscopy (PLM). Compounds prepared were structurally characterized via infrared, 1H-NMR, mass spectroscopy, thermogravimetric and elemental analysis. Transition temperatures were first correlated with the alkoxy-chain length (n, that varies between 6, 8, 10, 14, and 16 carbons) within each homologous series, and again with the polarisability anisotropy (xÜX) of the Ar-X bond, where X changes between CH3O, CH3, H, Br, and CN groups .Comparative studies were made to investigate the effect of introducing the extra phenyl azo moiety into the previously investigated three-ring compounds, 4-substituted phenyl 4{u2032}-(4{u2033}-alkoxyphenylazo) benzoates (IIna-e), 4-substituted phenylazo 4{u2032}-(4{u2033}- alkoxy phenyl) benzoates (IIIna-e), and 4-(4{u2032}-alkoxy phenylazo) phenyl 4{u2033}-substituted benzoates (IVna-e), each bear the same polar group, X, and the alkoxy group with chain length, n | ||
| 530 | _aIssued also as CD | ||
| 653 | 4 | _a4-substituted phenylazo phenyl 4'-(4"-alkoxy phenylazo) benzoates | |
| 653 | 4 | _aMesophase stability | |
| 653 | 4 | _aThermal stability | |
| 700 | 0 |
_aAbelgawad A. Fahmi , _eSupervisor |
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| 700 | 0 |
_aGamal R. Saad , _eSupervisor |
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| 700 | 0 |
_aMagdi M. Naoum , _eSupervisor |
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| 856 | _uhttp://172.23.153.220/th.pdf | ||
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_aAsmaa _eCataloger |
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_aNazla _eRevisor |
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_2ddc _cTH |
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_c72147 _d72147 |
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