Al-Azhar University, Faculty of Science (Boys)Al-Azhar Bulletin of Science1110-2535302-A20191201EVALUATION OF CATALYTIC IMPLEMENTATION OF SPINEL CoFe2O4LOADED NaY IN DIRECT HYDROXYLATION OF BENZENE TO PHENOL1108675310.21608/absb.2019.86753ENAdhamEl-ZomrawyDepartment of Chemistry, Faculty of Science, Al-Azhar University, Nasr City 11884, Cairo, EgyptMohamed S.ThabetDepartment of Chemistry, Faculty of Science, Al-Azhar University, Nasr City 11884, Cairo, EgyptDepartment of Chemistry, Faculty of Science, Jazan University, Saudi ArabiaJournal Article20190820Spinel cobalt ferrite CoFe2O4 was synthesized and in situ incorporated onto the porous structure of NaY zeolite by the co-precipitation process. The structural design of CoFe2O4/NaY composite was advantageous in terms of activity and stability. Various techniques were utilized to characterize the catalysts like X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and pore structure analysis by N2 adsorption at 77 K. It has been found that spinal CoFe2O4 in CoFe2O4/NaY was sparse on the NaY surface, along with the relevant species inside the zeolite pores. The SEM surface morphology suggests that CoFe2O4 has an irregular structure of large aggregated crystals, whereas CoFe2O4/NaY exhibited predominantly a uniform spherical-like morphology of smaller particle sizes and small cavities on the external surface. The direct hydroxylation of benzene with H2O2 as a green oxidant was inspected. The effects of the amount of test dose of the CoFe2O4/NaY catalyst, concentration of H2O2, and the reaction temperature were studied. Higher yield of phenol was obtained with increasing the concentration of H2O2, catalyst dose and temperature. The kinetics of the hydroxylation of benzene to phenol has shown that the catalyst dose was highly affected reaction rate. The Arrhenius relationship was applied to determine the activation energy of the reaction to be 25.98 kJ/Mol.Al-Azhar University, Faculty of Science (Boys)Al-Azhar Bulletin of Science1110-2535302-A20191201AMPERO-PHOTOMETRIC METHOD (APM) FOR THE DETERMINATION OF COLORED SOLUTION CONCENTRATION USING A LIGHT DEPENDENT RESISTOR (LDR)11168675210.21608/absb.2019.86752ENAdhamEl-ZomrawyDepartment of Chemistry, Faculty of Science, Al-Azhar University, Nasr City 11884, Cairo, EgyptJournal Article20190806A simple, portable photometer depending on the intensity of the light that passes through a colored solution was designed. Through it, the measured light intensity parameter is converted to an electrical current density, which flow in a circuit of light dependent resistor (LDR). The suggested device is characterized by that it does not depend on the absorptivity at a specific wavelength, but depends on the intensity of the light passing through the sample only. The merits of this method are low power, high sensitivity, and very low cost. The proposed method is in excellent harmony with the determination of the concentration of colored solutions by spectrophotometr. Al-Azhar University, Faculty of Science (Boys)Al-Azhar Bulletin of Science1110-2535302-A20191201THE UTILITY OF MICHAEL CONDENSATION FOR THE SYNTHESIS OF MACROMOLECULE SURFACTANTS FROM AZO-NAPHTHOLS AS POSSIBLE ANTIMICROBIALS17268675110.21608/absb.2019.86751ENAhmedHammamchemistry department, faculty of science, azhar university (boys), cairoA. S.El-TabeiEgyptian Petroleum Research Institute (EPRI), Nasr City, Cairo, EgyptM. A.HegazyEgyptian Petroleum Research Institute (EPRI), Nasr City, Cairo, EgyptMahmoud B.MohamedFaculty of Science, Al-zhar University, Chemistry Dept., Nasr City, Cairo, EgyptM. A.SadeqFaculty of Science, Al-zhar University, Chemistry Dept., Nasr City, Cairo, EgyptJournal Article20190818 ((E)-4-(pyridin-3-yldiazenyl)naphthalen-1-ol) and (4-((E)–pyridin-3-yldiazenyl)– 8-((Z)-pyridin-3yldiazenyl)naphthalene-1,5-diol) (IIIa, b) were prepared. Condensation of (IIIa, b) with 2-(pyridin-4ylmethylene) malononitrile (V) under Michael reaction conditions gave the corresponding bezo[h]chromene and dihydrochromene[8,7-h] chromene derivatives (VIa, b). The cationic derivatives for (IIIa, b) and (VIa, b) were obtained by quaternization as (IVa,b) and (VIIa,b). The structures obtained were confirmed form IR, 1HNMR and mass spectra studies. The antimicrobial activities were also studied and have been found that; the cationic dyes (IVa,b) and (VIIa) exhibit promising results against Candida albicans.