TY  - BOOK
AU  - Ahmed Mohamed Abdelfattah Refaie Sultan
AU  - Abdelgawad Ali Fahmi , 
AU  - Magdi M. Naoum , 
AU  - Mohamed Ahmed Alaasar , 
TI  - Synthesis and structure property relationship of some azo-ester organic compounds and their hydrogen-bonded complexes / 
PY  - 2015///
CY  - Cairo : 
PB  - Ahmed Mohamed Abdelfattah Refaie Sultan , 
KW  - 4-(3{u2032}-pyridylazophenyl)-4{u2032}{u2032}-alkoxy benzoates
KW  - 4-substituted benzoic acids
KW  - Angular 1:1 hydrogen-bonded supramolecular liquid crystalline complexes
N1  - Thesis (M.Sc.) - Cairo University - Faculty of Science - Department of Organic Chemistry; Issued also as CD
N2  - Two series of new pyridine-based azo dyes were prepared. The first, namely 4-(3{u2032}-pyridylazophenyl)-4{u2032}{u2032}-alkoxy benzoates (In), is a homologous series that bears terminal alkoxy group with a number of carbon atoms varies between 8, 10, 12, 14, and 16 carbons, respectively. The terminal substituent, X, in the second series, Ia-e, is a compact group with certain polarity that, alternatively, changes between electron donating (CH3₃O, CH₃) and electron withdrawing (Br, NO₂), together with the unsubstituted one ( i.e., X= H). The structures of the prepared compounds were confirmed via infrared spectroscopy (IR), nuclear magnetic resonance (NMR), mass spectrometry and elemental analysis. Their mesophase behavior was investigated via differential scanning calorimetry (DSC) and polarized light microscopy (PLM). All homologues of the first series, (In), were found to be mesomorphic, while all derivatives of the latter, Ia-e, were nonmesomorphic
ER  -