| 000 | 02331cam a2200337 a 4500 | ||
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| 003 | EG-GiCUC | ||
| 005 | 20250223032550.0 | ||
| 008 | 200831s2020 ua dh 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 | _aPh.D | ||
| 099 | _aCai01.12.10.Ph.D.2020.Ah.S | ||
| 100 | 0 | _aAhmed Mohamed Abdelfatah Refaie Sultan | |
| 245 | 1 | 0 |
_aSynthesis and structure property relationship of some organic azo compounds / _cAhmed Mohamed Abdelfatah Refaie Sultan ; Supervised Abdelgawad Ali Fahmi , Magdi Naoum |
| 246 | 1 | 5 | _aتشييد وعلاقة التركيب بالخواص لبعض مركبات الآزو العضوية |
| 260 |
_aCairo : _bAhmed Mohamed Abdelfatah Refaie Sultan , _c2020 |
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| 300 |
_a200 , (30) P. : _bcharts , facsimiles ; _c25cm |
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| 502 | _aThesis (Ph.D.) - Cairo University - Faculty of Science - Department of Organic Chemistry | ||
| 520 | _aTwo homologous series of the three-ring azo/ester compounds 2-(or1-) naphthyl 4'-(4''-alkoxy phenylazo) benzoates (Ina and IIna) were synthesized and characterized for their thermal behavior in order to investigate the effect of orientation of the naphthyl group on the mesophase behavior. A lateral methyl group was introduced into different positions of the alkoxy phenyl moiety, in position-2 to give series Inb and IInb and in position-3 to give series Inc and IInc to study the effect of insertion of a lateral substituent on the mesomorphic behavior of the synthesized compounds. Molecular structures of all of the prepared compounds were characterized via elemental analyses, fourier-transform infrared spectroscopy and 1H-NMR sspectra.Their mesophase characteristics were investigated by differential scanning calorimetry (DSC) and their phases identified via polarized light microscopy (PLM).Transition temperatures were correlated with the alkoxychain length (n), that varies between 6, 8, 10, 12, 14, and 16 carbons | ||
| 530 | _aIssued also as CD | ||
| 653 | 4 | _aLateral methyl group | |
| 653 | 4 | _aNaphthyl azo/ester liquid crystals | |
| 653 | 4 | _aOrientation | |
| 700 | 0 |
_aAbdelgawad Ali Fahmi , _eSupervisor |
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| 700 | 0 |
_aMagdi Naoum , _eSupervisor |
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| 856 | _uhttp://172.23.153.220/th.pdf | ||
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_aNazla _eRevisor |
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| 905 |
_aShimaa _eCataloger |
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| 942 |
_2ddc _cTH |
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_c77471 _d77471 |
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