sameh rizk

@asu.edu.eg

Prof. Organic Chemistry, chemistry, faculty of science
Ain Shams University



                                               

https://researchid.co/samehrizk

RESEARCH, TEACHING, or OTHER INTERESTS

Organic Chemistry, Environmental Chemistry

94

Scopus Publications

1529

Scholar Citations

24

Scholar h-index

48

Scholar i10-index

Scopus Publications

  • Investigation of Newly Prepared Chitosan Derivatives as a Corrosion Inhibitor of Low-Carbon Steel During Sulfuric Acid Pickling
    Mohamed N. M. Ismail, Nehal A. Barghout, Sameh A. Rizk, and Ahmed El Nemr
    Springer Science and Business Media LLC

  • Synthesis, design, biological activity, DFT study and molecular docking of new 1,2,4-triazine and 1,2,4-triazol derivatives bearing the phthalazine moiety
    Mohammed A. Kadhim, Mohammed G. Mukhlif, Estabraq W. Gayadh, Emad K． M. Zangana, Majid A. Mohaisen, Muthanna M. Matar, and Sameh Ahmed Rizk
    Elsevier BV


  • <sup>99m</sup>Tc-radiolabeling study of 2-amino-3-(4-hydroxyphenyl)-1-hydroxypropyl-1,1-bisphosphonic acid as a potential bone imaging agent
    Walid Hamouda, Mohamed Abdel-Motaleb, Mahmoud El-Tawoosy, Mahmoud Sanad, Sameh Rizk, and Maher El-Hashash
    Springer Science and Business Media LLC
    Abstract2-Amino-3-(4-hydroxyphenyl)-1-hydroxypropyl-1,1-bisphosphonic acid (TyrBP), a nitrogenated bisphosphonate (NBP), has been synthesized in a one-pot two-step process involving the phosphonation of L-tyrosine with phosphorus reagents (PCl3 and H3PO3) followed by hydrolysis. TyrBP was characterized using IR, NMR, and mass spectroscopy, and underwent a 99mTc-radiolabeling study to produce a potential bone imaging agent using sodium borohydride as a reducing agent for 99mTc eluted from the 99Mo/99mTc generator. Optimization of the radiolabeling conditions was performed to achieve a high radiochemical yield.


  • Synthesis of polymer nanocomposites as optical materials for flexible electronic devices
    Badriah M. Alotaibi, Haifa A. Al-Yousef, Ali Atta, Sameh A. Rizk, and Abdelfattah T. Elgendy
    Emerald
    In this study, polyvinyl alcohol (PVA) and sodium iodide (NaI) were mixed to prepare flexible composite (PVA/NaI) films using the green solution casting synthesis method. Subsequently, these films were exposed to different times of nitrogen plasma (15, 30, 45, and 60 min) using cold plasma source. The X-ray diffraction and scanning electron microscope analysis were utilized to reveal effects of nitrogen beam on the structural and morphology of the treated samples, respectively. Furthermore, the UV–vis spectroscopic measurements were utilized to study the optical parameters of the pristine and exposed films. Other parameters were computed, such as refractive index and dielectric constant. The plasma resonance frequency (WP) modified from 0.3 × 1013 Hz for the PVA/NaI to 0.41 × 1013, 0.34 × 1013, 0.31 × 1013, and 0.23 × 1013 Hz after irradiation of 15, 30, 45, and 60 min of nitrogen plasma, respectively. The most important aspect of this research is the optimization of composite characteristics and plasma conditions to create materials with novel properties for usage in different optical devices. The results show that the irradiated films PVA/NaI are appropriate for use as optical materials for flexible optoelectronic devices.

  • Competent CuS QDs@Fe MIL101 heterojunction for Sunlight-driven degradation of pharmaceutical contaminants from wastewater
    M. Ahmed Mubarak, Reem Mohamed, Sameh Ahmed Rizk, Atef Samir Darwish, Osama Abuzalat, and Mohamed Eid M. Ali
    Elsevier BV

  • Microwave-ultrasonic assisted extraction of lignin to synthesize new nano micellar organometallic surfactants for refining oily wastewater
    M. H. Alhalafi, S. A. Rizk, E. S. Al-Malki, and A. M. Algohary
    Springer Science and Business Media LLC
    AbstractIn this work, a beneficial approach for efficient depolymerization of lignin and controllable product distribution is provided. Lignin, an abundant aromatic biopolymer, has the potential to produce various biofuels and chemical adsorption agents and is expected to benefit the future circular economy. Microwave-ultrasonic (MW/US) assisted efficient depolymerization of lignin affords some aromatic materials used in manufacturing the starting material to be investigated. Some nano organometallic surfactants (NOMS) based on Ni2+, Cu2+, Co2+, Fe3+, and Mn2+ besides 2-hydroxynaphth-sulphanilamide are synthesized to enhance oil recovery (EOR). In this work, the assessment of the NOMS’s efficiency was improving the heavy oil recovery via the study of the dynamic interfacial tension (IFT), contact angle, and chemical flooding scenarios. The NOMS-Ni2+ exhibited the maximum reduction of viscosity and yield values. Dropping the viscosity to 819.9, 659.89, and 499.9 Pa s from blank crude oil viscosity of 9978.8, 8005.6, and 5008.6 Pa s respectively at temperatures of 40, 60, and 80 °C was investigated. The reduction of τB values was obtained also by OMS-Ni2+. The minimum IFT was recorded against the Ni2+ derivatives (0.1 × 10–1 mN m−1). The complete wettability alteration was achieved with the NOMS-Ni2+ surfactant (ɵ $$\\cong 6.01).$$ ≅ 6.01 ) . The flooding test has been steered in 3 sets using the sand-packed model as a porous media at surfactant concentrations (1, 1.5, 2 and 2.5%) at 50 °C and 499 psi as injection pressure. The best value (ORs) formed for NOMS-Ni2+ were 62, 81, 85.2, and 89% respectively as compared with other NOMS-M2+ at the same concentrations. The mechanism of alternating wettability was described in the text. The rheology of the used heavy crude oil was investigated under temperatures of 40, 60, and 80 °C. Graphical Abstract




  • The enhanced visible-light-driven photocatalytic performance of nanocrystalline TiO<inf>2</inf> decorated by quinazolinone-photosensitizer toward photocatalytic treatment of simulated wastewater
    Mahmoud Adel Hamza, Shaimaa A. Abd El-Rahman, Sayed K. Ramadan, Ezz-Elregal M. Ezz-Elregal, Sameh A. Rizk, and Zeinab M. Abou-Gamra
    Elsevier BV

  • Influence of TiO<inf>2</inf> Nanoparticles on Enhancing the Properties Activity of Organic Polymeric Materials for Industrial Applications
    B. M. Alotaibi, Haifa A. Alyousef, A. Atta, S. A. Rizk, and Abdelfattah T. Elgendy
    The Electrochemical Society
    Novel composite (MC/TiO2) films consisting of titanium dioxide nanoparticles (TiO2NPs) and organic polymer methylcellulose (MC), were synthesized for applied in photocatalysis and industrial sectors. The preparation of the nanocomposites MC/TiO2 films were verified successfully by EDX technique, which demonstrated the uniform distribution of TiO2 in the MC. Moreover, in frequency of 20 Hz to 5.5 MHz, the dielectric properties of MC as a function of TiO2 concentration were determined. The conductivity improved from 5.8 × 10−8 S.cm−1 for MC to 3.8 × 10−6 S.cm−1 for the composite MC/TiO2, and the dielectric constant ε ′ has risen from 87 for MC to 179 for the composite MC/TiO2. In addition, the energy density increases from 3.86 × 10−4 J m−3 for MC to 7.94 × 10−4 J m−3 for MC/TiO2, and the relaxation time τ r dropped from 11.5 × 10−5 sec to 2.58 × 10−5. In summary, the data investigated that the dielectric characteristics of MC/TiO2 were modified for usage in different applications as wastewater treatment and energy storage devices.

  • Novel pyrazole and imidazolone compounds: synthesis, X-ray crystal structure with theoretical investigation of new pyrazole and imidazolone compounds anticipated insecticide’s activities against targeting Plodia interpunctella and nilaparvata lugens
    Mona A. Shalaby, Mohammad H. BinSabt, Sameh A. Rizk, and Asmaa M. Fahim
    Royal Society of Chemistry (RSC)
    In this study, (2-propoxyphenyl)(3-(p-tolyl)oxiran-2-yl)methanone was synthesised by oxidizing the double bond of the respective chalcone via the Weitz–Scheffer epoxidation reaction. The insecticidal activities of the newly synthesized compounds were tested with computional investigation.

  • Synthesis, structural characterization and optical studies of Fe<inf>2</inf>O<inf>3</inf> nanoparticles based polymeric materials for flexible electronic devices
    B. M. Alotaibi, , H. A. Al-Yousef, A. Atta, S. A. Rizk, A. T. Elgendy, , , , and
    Virtual Company of Physics
    In this work, a thin film containing a flexible polymer nanocomposite of iron oxide (Fe2O3) and poly(4-chloroaniline) P(4-ClAni) was successfully synthesized using the green polymerization fabrication method. To confirm the effective synthesis of the P(4- ClAni)/Fe2O3 nanocomposite, the XRD, SEM, and FTIR analyses were used. The SEM pictures revealed that the nanocomposite contain Fe2O3 nanoparticles distributed throughout the polymer matrix. The optical absorbance of the P(4-ClAni) and P(4-ClAni)/Fe2O3 films was measured at room temperature using a UV-vis spectrophotometer from 190 to 1150 nm. The optical properties of P(4-ClAni)/Fe2O3 films were calculated using Tauc's relation. The Urbach energy of the P(4-ClAni) increases from 0.96 eV to 1.65 eV, 1.73 eV, and 1.86 eV, respectively, when mixed with 2%, 4%, and 6% of Fe2O3. On the other hand, the band gap energy of P(4-ClAni) decreases from 3.57 eV to 3.39 eV, 3.07 eV, and 2.84 eV, respectively, with the addition of 2%, 4%, and 6% Fe2O3. Based on the results of this study, the composite P(4-ClAni)/Fe2O3 sheets can be used for flexible electronic devices.


  • Synthesis and Biological Applications of Coumarinyl-Chalcones
    Sayed K. Ramadan, Sameh A. Rizk, and Eman A.E. El-Helw
    Bentham Science Publishers Ltd.
    Abstract: This survey provides information on the synthesis and biological applications of coumarinyl-chalcones. Chalcones are unsaturated ketones involving the reactive ketoethylenic group (CO-CH=CH). Chalcones are naturally abundant in many medical plants, including vegetables, fruits, and foods. Natural and synthetic chalcone compounds exhibit a broad spectrum of biological properties like anticancer, anti-inflammatory, anti-HIV, antioxidant, antimalarial, and antimicrobial. Some conventional, microwave, and grinding techniques have been utilized for the synthesis of chalcones. Noteworthy, the Claisen- Schmidt condensation reaction remains the most popular and effective method for synthesis. It summarizes information about its synthetic methods as building blocks in some reactions like cyclization reactions and medical applications. This review article presents an overview of approaches and biological data for chalcones bearing a coumarin scaffold.

  • Toxicological Evaluation of Pomegranate Fruit Extract in Male and Female Rats
    Abd El-Azeem El-Sheikh, Ahmed Barakat, Omar Rabiee, Sameh Rizk, Ahmed Kandeil, and Ahmed El Taweel
    Egypts Presidential Specialized Council for Education and Scientific Research
    .

  • Green synthesis of aryl-(4-oxo-1,2-dihydroquinazolin-4-yl-methylene) pyrazole-TiO<inf>2</inf> nanoparticles as dyes removable for waste water treatment
    Badriah Alotaibi, Sameh A. Rizk, Haifa A. Alyousef, Ali Atta, and Abdelfattah T. Elgendy
    Wiley
    Facile synthesis for true intermediate (E)‐ and Z‐2‐(((5‐bromo‐1‐(3‐chloropyridin‐2‐yl)‐1H‐pyrazol‐3‐yl)methylene)amino)‐5‐chloro‐3‐methylbenzoic acid precursors and 2‐(5‐bromo‐1‐(3‐chloropyridin‐2‐yl)‐1H‐pyrazol‐3‐yl)‐6‐chloro‐3,8‐dimethylquinazolin‐4(3H)‐one (QPP) as electron donor/electron acceptor to be working as efficient dye sensitizers. These new derivatives have a wide‐band gap photo‐catalysts semiconductor and are performing to spread to the visible‐light region to give more stability and efficiency towards biomedicine for different diseases. In the present work, the authors are suggesting the design and synthesis of new structures of QPP molecule with extended visible light absorptivity due to the extended π‐π/n‐π conjugations, to stimulate TiO2 nanoparticles in visible‐light region. The physicochemical characterizations confirmed the successful synthesis of QPP, TiO2, and QPP II/TiO2 samples with the proposed structures. Fixing of QPP on the TiO2 surface is refining the optical properties of TiO2 with enhancing the charge separation and generating the efficient antenna in the visible region. Furthermore, the QPP II/TiO2 sample achieved a threefold enhancement in the observed rate constant of the photo‐degradation of rhodamine B dye when compared to the bare TiO2. Finally, the effect of the scavengers was investigated by to be the most reactive species, and the mechanism of the enhancement was suggested for investigation of the proposed structures in various photo‐catalytic and biomedical applications.


  • Synthesis, Insecticidal Activity and DFT Study of 1,2,4-Triazolidinthione, 1,3,5-Oxadiazine and Thiourea Derivatives
    Amira A. El-Sayed, Galal A. Elsayed, Sameh A. Rizk, and Mahmoud F. Ismail
    Informa UK Limited

  • UPLC-QTOF/MS-assisted chemical profiling of Daucus carota leaf extractand evaluation of its antioxidant, antimicrobial and antibiofilm activities: Evidence from in vitro and in silico studies
    Maha Elshazly, Hayam Mahmoud, Amal Saad, Laila Refahy, Mosad Ghareeb, and SAMEH RIZK
    Egypts Presidential Specialized Council for Education and Scientific Research

  • Photosensitization of TiO<inf>2</inf> microspheres by novel Quinazoline-derivative as visible-light-harvesting antenna for enhanced Rhodamine B photodegradation
    Mahmoud Adel Hamza, Sameh A. Rizk, Ezz-Elregal M. Ezz-Elregal, Shaimaa A. Abd El-Rahman, Sayed K. Ramadan, and Zeinab M. Abou‑Gamra
    Springer Science and Business Media LLC
    AbstractWater pollution is one of the global threats severely affecting our planet and human health. Organic textile dyes are one of the common organic water pollutants that are presentient to degradation by traditional physical methods. Semiconductor-assisted photocatalysis is considered a green, efficient, and sustainable technology for wastewater treatment. To maximize the efficient utilization of solar radiation, it is of pivotal significance to explore novel organic molecules to be employed as efficient dye sensitizers for wide-bandgap semiconductors to extend their performance to the Visible-light region. Hence, in this work, we are proposing the design and synthesis of novel structures of QAD molecule as a dye photosensitizer with extended visible light absorptivity due to the extended π–π/n–π conjugations, to promote the performance of TiO2 nanoparticles to the visible-light region and enhance the charge separation. The physicochemical characterizations confirmed the successful synthesis of QAD, TiO2, and QAD/TiO2 samples with the proposed structures. The anchoring of QAD molecules on the surface of TiO2 caused a substantial improvement in the optical characteristics of TiO2 as well as overcoming its common drawbacks by decreasing its bandgap energy to 2.6 eV, a remarkable reduction of PL intensity indicating reducing the e–h recombination and enhancing the charge separation, and creation of efficient visible light-harvesting antenna in the range of 400–600 nm. Besides, the QAD/TiO2 sample achieved a 3-fold enhancement in the observed rate constant of the photodegradation of Rhodamine B dye compared to the bare TiO2. The parameters affecting the photodegradation process were optimized and the sample displayed outstanding stability after 4 consecutive cycles. Finally, the effect of the scavengers was investigated and $${\\mathrm{O}}_{2}^{\\cdot -}$$ O 2 · - was proposed to be the most reactive species and the mechanism of the enhancement was suggested based on the electron injection from the QAD’s HOMO level to the TiO2’s CB. Finally, this work opens the door for various studies for the investigation of the proposed structures or similar structures in various photocatalytic/biomedical applications.

  • Microwave-assisted synthesis, antioxidant activity, docking simulation, and DFT analysis of different heterocyclic compounds
    Mona A. Shalaby, Asmaa M. Fahim, and Sameh A. Rizk
    Springer Science and Business Media LLC
    AbstractIn this investigation, pressure microwave irradiation was used to clarify the activity of 1-(2-hydroxyphenyl)-3-(4-methylphenyl)prop-2-en-1-one (3) towards several active methylene derivatives utilized the pressurized microwave irradiation as green energy resource . Chalcone 3 was allowed to react with ethyl cyanoacetate, acetylacetone, and thioglycolic acid; respectively, at 70 °C with pressure under microwave reaction condition to afford the corresponding 2-hydroxyphenylcyanopyridone, 2-hydroxyphenyl acetylcyclohexanone, and thieno[2,3-c]chromen-4-one derivatives respectively. Moreover, the reaction of chalcone 3 with hydrogen peroxide with stirring affords the corresponding chromen-4-one derivative. All the synthesized compounds were confirmed through spectral tools such as FT-IR, 1HNMR, 13CNMR, and mass spectrum. Furthermore, the synthesized heterocycles were exhibited excellent antioxidant activity and comparable with vitamin C, where the presence of the OH group increases the scavenger radical inhibition. Furthermore, the biological activity of compound 12 was demonstrated through molecular docking stimulation using two proteins, PDBID: 1DH2 and PDBID: 3RP8, which showed that compound 12 possesses greater binding energy and a shorter bond length comparable with ascorbic acid. Also, the compounds were optimized through DFT/B3LYP/6-31G (d,p) basis set and identification of their physical descriptors, whereas the compound 12 was confirmed through X-Ray single structure with Hirsh field analysis of the compound to know the hydrogen electrostatic bond interaction, and correlated with the optimized structure by comparing their bond length, bond angle, FT-IR, and NMR, which gave excellent correlation.

  • Novel Azo Dye Based on 1,3,4-Thiadiazole: Synthesis, Characterization Linked to Application as Dye-Sensitized Solar Cells and Antioxidant
    Ashraf Ashmawy, amr Alahl, Ali A.Ali, Ammar Mahmoud, and sameh rizk
    Egypts Presidential Specialized Council for Education and Scientific Research

RECENT SCHOLAR PUBLICATIONS

  • Investigation of Newly Prepared Chitosan Derivatives as a Corrosion Inhibitor of Low-Carbon Steel During Sulfuric Acid Pickling
    MNM Ismail, NA Barghout, SA Rizk, A El Nemr
    Journal of Bio-and Tribo-Corrosion 11 (1), 13 2025

  • Synthesis, design, biological activity, DFT study and molecular docking of new 1, 2, 4-triazine and 1, 2, 4-triazol derivatives bearing the phthalazine moiety
    MA Kadhim, MG Mukhlif, EW Gayadh, EKM Zangana, MA Mohaisen, ...
    Journal of Molecular Structure 1322, 140384 2025

  • Synthesis, X-ray, Hirshfeld surface analysis, computational investigations, electrochemical analysis, ADME investigations, and insecticidal activities utilized docking
    MA Shalaby, MH BinSabt, HM Al-Matar, SA Rizk, AM Fahim
    Journal of Molecular Structure 1322, 140189 2025

  • 99mTc-radiolabeling study of 2-amino-3-(4-hydroxyphenyl)-1-hydroxypropyl-1, 1-bisphosphonic acid as a potential bone imaging agent
    W Hamouda, M Abdel-Motaleb, M El-Tawoosy, M Sanad, S Rizk, ...
    Journal of Radioanalytical and Nuclear Chemistry, 1-8 2025

  • Microwave/ultrasonic powered in-liquid plasma-assisted synthesis of 3D-hierarchical nanoporous network wheat-straw lignin/thiadiazole amide-modified cellulose sponge composite
    BM Kanaan, AM Algohary, ZH Alhalafi, SA Rizk, AS Darwish
    International Journal of Biological Macromolecules 284, 138127 2025

  • Biochemical Effect of Nanoemulsion of Pimpinella anisum L. Essential Oil On Larvae of Culex pipiens L., 1758 (Diptera: Culicidae)
    E Abdel-Nasser, JA Hafez, RM Badawy, SA Rizk, HH Hefny, RM Azmy
    Egyptian Academic Journal of Biological Sciences, E. Medical Entomology 2024

  • Synthesis of polymer nanocomposites as optical materials for flexible electronic devices
    BM Alotaibi, HA Al-Yousef, A Atta, SA Rizk, AT Elgendy
    Surface Innovations 13 (1), 44-53 2024

  • Synthesis, characterization, antimicrobial activity and DFT studies of novel phthalazine-5, 10-dione derivatives
    MYA Abuderbala, MG El-Banna, SA RIZK, AM El-Naggar, AMA Hassan
    Egyptian Journal of Chemistry 2024

  • Competent CuS QDs@ Fe MIL101 heterojunction for Sunlight-driven degradation of pharmaceutical contaminants from wastewater
    MA Mubarak, R Mohamed, SA Rizk, AS Darwish, O Abuzalat, MEM Ali
    Environmental Nanotechnology, Monitoring & Management 22, 101013 2024

  • Nitrogen activator stabilizer for reducing and protecting nitrogen fertilizer
    HEDS El-Beltagi, KMA Ramadan, HSS Saudy, SA Rizk
    US Patent 12,134,585 2024

  • Synthesis, anticancer properties, and molecular modeling of novel thiazolyl-pyrazolone derivatives conjugated with tetrahydronaphthalene as anticancer agents with potential
    EK Hamza, ES Zarie, IMI Fakhr, HM Awad, SA Rizk, NA Hamdy
    Egyptian Journal of Chemistry 67 (11), 411-423 2024

  • In vitro Anticancer studies of new synthetic Hybrid Quinolines
    AK Abdallah, SA Rizk, MR Aly
    Alfarama Journal of Basic & Applied Sciences 5 (4), 538-548 2024

  • One Pot Synthesis of Thiopyrimidine Derivatives from Lignin Reproductions by Microwave-Assisted Ultrasonic Microscopy with DFT Description for Clarifying the Mass Spectrum
    AM Algohary, YO Al-Ghamdi, MA Babaker, SA Rizk
    Polycyclic Aromatic Compounds, 1-20 2024

  • Novel Furan-2 (3H)-one derivatives as promising anticancer agents against liver and breast cancers cell lines: Green Synthesis, Spectroscopic analysis, in Vitro
    EM Azmy, EA Mohamed, AA Altalhi, IF Nassar, SA Rizk, HM Awad, ...
     2024

  • Scanning Electron Microscopy of Cuticular Deformations in Culex pipiens Linnaeus, 1758 (Diptera: Culicidae) Larvae Associated with Larvicidal Effect of Nanoemulsion of
    E Abdel-Nasser, JA Hafez, RM Badawy, SA Rizk, HH Hefni, RM Azmy
    Egyptian Journal of Aquatic Biology & Fisheries 28 (5) 2024

  • Histopathological Alterations in the Larvae of Culex pipiens L.(Diptera: Culicidae) Induced by Nanoemulsion of Pimpinella anisum L. Essential Oil.
    E Abdel-Nasser, JA Hafez, RM Badawy, SA Rizk, HH Hefni, RM Azmy
    Egyptian Journal of Aquatic Biology & Fisheries 28 (5) 2024

  • Superb bio-effectiveness of Cobalt (II) phthalocyanine and Ag NPs adorned Sm-doped ZnO nanorods/cuttlefish bone to annihilate Trichinella spiralis muscle larvae and adult worms
    FEA Bayaumy, SA Rizk, AS Darwish
    Parasitology International 101, 102899 2024

  • The enhanced visible-light-driven photocatalytic performance of nanocrystalline TiO2 decorated by quinazolinone-photosensitizer toward photocatalytic treatment of simulated
    MA Hamza, SA Abd El-Rahman, SK Ramadan, EEM Ezz-Elregal, SA Rizk, ...
    Journal of Photochemistry and Photobiology A: Chemistry 452, 115599 2024

  • A Sustainable Synthesis, Eco-Safe Approach Efficiency and DFT Study of Novel 5, 6, 7, 8-Tetrahyroquinazolin-2 (1H)-one Derivatives as Antioxidant Reagents
    M Abed, AFM Fahmy, EKM Zangana, AI Hassaballah, SA Rizk
    Eco-Safe Approach Efficiency and DFT Study of Novel 5 (6), 7 2024

  • Nitrogen activator stabilizer for reducing and protecting nitrogen fertilizer
    HEDS El-Beltagi, KMA Ramadan, HSS Saudy, SA Rizk
    US Patent 12,006,272 2024

MOST CITED SCHOLAR PUBLICATIONS

  • Synthesis, characterization and computational chemical study of novel pyrazole derivatives as anticorrosion and antiscalant agents
    FET Heakal, SK Attia, SA Rizk, MA Abou Essa, AE Elkholy
    Journal of Molecular Structure 1147, 714-724 2017
    Citations: 55

  • Synthesis, reactions and application of chalcones: A systematic review
    MA Shalaby, SA Rizk, AM Fahim
    Organic & Biomolecular Chemistry 21 (26), 5317-5346 2023
    Citations: 51

  • Synthesis of some novel heterocyclic and schiff base derivatives as antimicrobial agents
    ME Azab, SA Rizk, AEGE Amr
    Molecules 20 (10), 18201-18218 2015
    Citations: 49

  • Enhancing lubricating oil properties using novel quinazolinone derivatives: DFT study and molecular dynamics simulation
    AE Elkholy, SA Rizk, AM Rashad
    Journal of Molecular Structure 1175, 788-796 2019
    Citations: 48

  • Synthesis and regioselective reaction of some unsymmetrical heterocyclic chalcone derivatives and spiro heterocyclic compounds as antibacterial agents
    MA El-Hashash, SA Rizk, SR Atta-Allah
    Molecules 20 (12), 22069-22083 2015
    Citations: 48

  • Characterization of newly synthesized pyrimidine derivatives for corrosion inhibition as inferred from computational chemical analysis
    FET Heakal, SA Rizk, AE Elkholy
    Journal of Molecular Structure 1152, 328-336 2018
    Citations: 47

  • Microwave-assisted synthesis, antioxidant activity, docking simulation, and DFT analysis of different heterocyclic compounds
    MA Shalaby, AM Fahim, SA Rizk
    Scientific Reports 13 (1), 4999 2023
    Citations: 41

  • Synthesis, spectroscopic characterization and computational chemical study of 5-cyano-2-thiouracil derivatives as potential antimicrobial agents
    SA Rizk, AM El-Naggar, AA El-Badawy
    Journal of Molecular Structure 1155, 720-733 2018
    Citations: 39

  • Facile Synthesis, Characterization, and Antimicrobial Evaluation of Novel Heterocycles, Schiff Bases, and N-Nucleosides Bearing Phthalazine Moiety
    NFM Mohamed Emad Azab, Sameh Ahmed Rizk
    Chem. Pharm. Bull. 64 (5), 439-450 2016
    Citations: 39

  • One‐pot Synthesis of Novel Spirooxindoles as Antibacterial and Antioxidant Agents
    MA El‐Hashash, SA Rizk
    Journal of Heterocyclic Chemistry 54 (3), 1776-1784 2017
    Citations: 38

  • 42 Utility of β-aroyl acrylic acid in heterocyclic synthesis
    SA Rizk, MA El-Hashash, KK Mostafa
    Egyptian Journal of Chemistry 51 (5), 611 2008
    Citations: 38

  • Straightforward synthesis, antiproliferative screening, and density functional theory study of some pyrazolylpyrimidine derivatives
    KNM Halim, SA Rizk, MA El‐Hashash, SK Ramadan
    Journal of Heterocyclic Chemistry 58 (2), 636-645 2021
    Citations: 34

  • Synthesis, DFT study, molecular docking and insecticidal evaluation of some pyrazole-based tetrahydropyrimidine derivatives
    KNM Halim, SK Ramadan, SA Rizk, MA El-Hashash
    Synthetic Communications 50 (8), 1159-1175 2020
    Citations: 34

  • Facile synthesis and structural characterization of some phthalazin-1 (2H)-one derivatives as antimicrobial nucleosides and reactive dye
    M EL-Hashash, S Rizk, F El-Bassiouny, D Guirguis, S Khairy, L Guirguis
    Egyptian Journal of Chemistry 60 (3), 407-420 2017
    Citations: 33

  • Cytotoxic activity and density functional theory studies of some 1, 3-diphenylpyrazolyltetrahydropyrimidine derivatives
    SK Ramadan, KNM Halim, SA Rizk, MA El-Hashash
    Journal of the Iranian Chemical Society 17 (7), 1575-1589 2020
    Citations: 32

  • Efficient Green Synthesis and Computational Chemical Study of Some Interesting Heterocyclic Derivatives as Insecticidal Agents
    AFM Fahmy, SA Rizk, MM Hemdan, AA El‐Sayed, AI Hassaballah
    Journal of Heterocyclic Chemistry 2019
    Citations: 31

  • Synthesis and biological activity on IBD virus of diverse heterocyclic systems derived from 2-cyano-N'-((2-oxo-1,2-dihydroquinolin-3-yl)methylene)acetohydrazide
    MM Kaddah, ARI Morsy, AA Fahmi, MM Kamel, MM Elsafty, SA Rizk, ...
    Synthetic Communications 51 (22), 3366-3378 2021
    Citations: 30

  • One-pot synthesis, spectroscopic characterization and DFT study of novel 8-azacoumarin derivatives as eco-friendly insecticidal agents
    SA Rizk, GA Elsayed, MA El-Hashash
    Journal of the Iranian Chemical Society 15, 2093-2105 2018
    Citations: 30

  • The uses of 2-ethoxy-(4H)-3, 1-benzoxazin-4-one in the synthesis of some quinazolinone derivatives of antimicrobial activity
    MA El-Hashash, KM Darwish, SA Rizk, FA El-Bassiouny
    Pharmaceuticals 4 (7), 1032-1051 2011
    Citations: 30

  • Antioxidant activity of novel nitrogen scaffold with docking investigation and correlation of DFT stimulation
    MA Shalaby, AM Fahim, SA Rizk
    RSC advances 13 (21), 14580-14593 2023
    Citations: 29