New Valley University, Faculty of Science, Chemistry Department, Egypt. New Valley University, Faculty of Science, Chemistry Department, El-Kharaja, Egypt.
Design and thermal imidization of new 1,3-thiazine-based polyimides and copolyimides for high-performance corrosion inhibition Marwa M. Sayed, Shimaa M. Ahmed, Mohamed Abdel-Hakim, El-Refaie Kenawy, Kamal I. Aly Scientific Reports, 2025 A new polyimide, poly(1,3-thiazine imide) (PTzI), together with two co-polyimides (CoPTz-DsI and CoPTz-HaI), were synthesized from the monomer named 4,4’-(1,4-phenylene)bis(6-(benzene-2-yl)-6 H-1,3-thiazine-2-amine) (PTA), which has a di-1,3-thiazine heterocyclic structure. The structure of PTA was confirmed with FT-IR, along with NMR spectra and mass spectroscopy. A thermal imidization process was used to prepare PTzI from the corresponding polyamic acid (PAA), which was obtained by polycondensation of PTA with 3,3′,4,4′-benzophenone tetracarboxylic dianhydride (BTDA). Similarly, the copolymers were synthesized via thermal imidization of PAAs derived from the polycondensation of PTA with 4,4′-diaminodiphenyl sulfone (DDS) or 1,6-hexane diamine (HAD), in addition to BTDA. The structure and imidization of each polymer were verified at various curing temperatures using Fourier transform infrared FT-IR spectroscopy. X-ray diffraction verified their amorphous nature, while scanning electron microscopy (SEM) morphological investigation indicated different levels of homogeneity and compactness. The rigid aromatic backbones and imide linkages provide exceptional thermal stability and chemical resistance, demonstrating their high performance. Thermogravimetric study (TGA and derivative TGA) showed that the materials had outstanding thermal stability, with high degradation initiation and initial decomposition temperatures (Td 5% ) in the range of 294–418 °C, and char yields of 52–63% at 800 °C. In acidic environments, the synthesized polymers have shown exceptional corrosion prevention performance for mild steel MS, according to electrochemical evaluations. Due to its structural composition rich in 1,3-thiazine structure, PTzI exhibited the highest inhibition efficiency (99.4%). Additionally, CoPTz-HaI and CoPTz-DsI demonstrated excellent efficiencies of 95.2% and 96.4%, respectively. The inhibitory performance was shown to be improved as the PTA concentration increased, suggesting that it may be used to create more sophisticated coatings that resist corrosion.
Synthesis, characterization, and photophysical properties of innovative polyketone luminophores: exhibiting clustering-triggered emission and metal ion sensing Marwa M. Sayed, Islam S. Marae, Mohamed F. Mostafa, Kamal I. Aly, Etify A. Bakhite Polymer Bulletin, 2025 Clustering-triggered emission (CTE) luminophores are novel luminescence compounds lacking extensive conjugation and receiving considerable interest. Two novel fluorescent polyketones (PKs) with a styrene unit as a pendant group in their backbone have been successfully synthesized. They are distinguished by the groups that separate the attached repeating monomeric units diacetyl cyclohexanone styrene (DAcSt), polyketone ether styrene (PKESt) with two benzene rings separated by an aliphatic ether or polyketone styrene (PKSt) with a single benzene ring. Using different techniques to investigate the structural, thermal stabilities, and morphological analyses of the polymers (PKSt, PKESt), their photophysical luminescence behavior is examined, and it appears that they are novel CTE compounds as a result of numerous n-π*, π-π* transitions and hydrogen-bonding interaction, displaying aggregation-induced emission (AIE) phenomena. PKESt has excitation-independent emission and generates blue light at different excitation wavelengths even at a short wavelength of 256 nm, while PKSt emits white light at 256 nm and blue emission at 325 nm, showing excitation-dependent wavelength. These unique luminous phenomena will bring light to the mechanism of clusteroluminescence (CL) and provide new approaches to the rational design of innovative luminescent materials. This study not only discloses new properties of PKs clustering emission but also gives novel perspectives on how to use PKs clustering emission to build novel types of luminescence systems. This system’s potential is metal ion sensors for transition metals (Zn2+, Ni2+, Co2+, Cu2+, Fe3+) with outstanding selective fluorescence response to Fe3+ ions. These polymers may be useful photocatalytic materials with ferric ions since Fe3+ ions quench these Pks.
Unveiling the potential of a functionalized pyrrole-based polymer for efficient cadmium ion removal from wastewater: synthesis, characterization, and performance evaluation Marwa M. Sayed, Islam S. Abd El-Hamid, Haitham M. El-Bery, Mostafa Farrag, Kamal I. Aly Environmental Sciences Europe, 2024 Cadmium ion Cd2+ contamination is a major environmental issue caused by industry. Polyarylidene N-hexane pyrrole (PAPh) and crosslinked polyarylidene N-phenyl pyrrole (PAPD) were prepared from the previously synthesized polymer (polyarylidene ketone (PAK)) by using the advantage of repeating carbonyl groups at the 1,4 position and reacting it with hexylamine and P-phenylenediamine via the Paal–Knorr reaction. Various methods were used to characterize polymers, such as FT-IR spectroscopy, X-ray diffraction (XRD), thermogravimetry analysis (TGA), UV–visible spectroscopy, scanning electron microscope (SEM), zeta potential, and surface area measurements (BET), revealing successful fabrication, good thermostability, and well-defined microporous structures useful for Cd2+ adsorption. Optimal adsorption capacities of 55.8 mg g−1 for PAPh and 86.95 mg g−1 for PAPD indicate a significant enhancement in Cd2+ adsorption via their microporous structures, Cd2+ adsorption was also investigated in terms of contact time, initial concentration, and pH. A total input concentration of 30 ppm Cd ions, may yield an 84.3% removal rate for PAPh and an 89.2% removal rate for PAPD. The experimental results were well-fit by many models, including pseudo-second-order kinetics (PSO), Freundlich isotherms, intraparticle diffusion, and Langmuir. The varying adsorption performances of the two polymers studied, (PAPh) and (PAPD), were found to be derived from their respective chemical structures, which include various functional groups, according to studies conducted on Cd2+ in an aqueous solution. Cd2+ adsorption on polymers was considered physisorption; π–cation interactions and surface complexation played significant roles in adsorption. The PAP polymers may be considered promising substitutes and innovative adsorbents to remove Cd2+ ions from a water solution.
Polymerization-Induced Modulation of Optical, Dielectric, and Electrical Properties in an Azomethine–Triphenylpyridine Conjugated Organic Semiconductor MM Sayed, KI Aly, YA Kasem, MR Belal, MS Kamel, EK Shokr Macromolecules , 2026 2026
Molecular engineering of polyhydrazides: a unified framework for tunable white-light emission, thermal robustness, and high-performance dye adsorption MS Tolba, A Harby, AMK El-Dean, MM Sayed, O Younis European Polymer Journal 246, 114571 , 2026 2026 Citations: 2
A Model Compound Approach to Elucidate Structure–Property Relationships in a White-Light Emitting Polyamide MS Tolba, A Harby, AM Kamal El-Dean, MM Sayed, O Younis New Valley University Journal of Basic and Applied Sciences , 2026 2026
Naphthoxazine outperforms benzoxazine: carbazole-based polymers with enhanced blue luminescence and high thermal stability O Younis, FM Taher, MM Sayed, M Sayed, M Ahmed European Polymer Journal, 114471 , 2025 2025 Citations: 1
Multifunctional polyamides: Designing rigid and flexible architectures for flame retardant, dye adsorbent, single-material white-light emitting, and color-tunable … O Younis, A Harby, EA Orabi, AMK El-Dean, MM Sayed, MS Tolba Reactive and Functional Polymers, 106597 , 2025 2025 Citations: 6
Design and thermal imidization of new 1, 3-thiazine-based polyimides and copolyimides for high-performance corrosion inhibition MM Sayed, SM Ahmed, M Abdel-Hakim, ER Kenawy, KI Aly Scientific Reports 15 (1), 37354 , 2025 2025 Citations: 3
Azobenzene-Based Poly (ether-ketone) s with tunable alkylene spacers: synthesis, morphological, thermal characterization, and efficient dye adsorption KI Aly, AI Ouf, MM Sayed, O Younis Journal of Polymer Research 32 (10), 334 , 2025 2025 Citations: 3
Synthesis, characterization, and photophysical properties of innovative polyketone luminophores: exhibiting clustering-triggered emission and metal ion sensing MM Sayed, IS Marae, MF Mostafa, KI Aly, EA Bakhite Polymer Bulletin 82 (12), 7077-7099 , 2025 2025
Synthesis, electrochemical and quantum chemical studies of new pyrido[2,3- d ]pyrimidine derivatives incorporating sulfonamide moiety HA AlGhamdi, EA Ishak, HMD Nasr, IMM Othman, M Abdel-Hakim, ... Journal of the Iranian Chemical Society 22 (3), 615-630 , 2025 2025
Enhancing corrosion protection and luminescence in bio-based polyurethanes with fluorescent Azine segments MM Sayed, MS Abd Elrahman, M Abdel-Hakim, KI Aly Progress in Organic Coatings 200, 109051 , 2025 2025 Citations: 4
Author Correction: The enhanced photocatalytic performance of CPAA doping with different concentrations of Titanium oxide nanocomposite against MB dyes under simulated sunlight … MM Sayed, AM Aboraia, YA Kasem, NN Elewa, YAM Ismail, KI Aly Scientific Reports 14, 16113 , 2024 2024 Citations: 1
The enhanced photocatalytic performance of CPAA doping with different concentrations of titanium oxide nanocomposite against MB dyes under simulated sunlight irradiations MM Sayed, AM Aboraia, YA Kasem, NN Elewa, YAM Ismail, KI Aly Scientific Reports 14 (1), 12768 , 2024 2024 Citations: 8
Unveiling the potential of a functionalized pyrrole-based polymer for efficient cadmium ion removal from wastewater: synthesis, characterization, and performance evaluation. MFKIA Marwa M. Sayed, Islam S. Abd El-Hamid, Haitham M. El-Bery Environmental Sciences Europe 36, 1-18 , 2024 2024 Citations: 6
Synthesis, structure, and optical studies of nanocomposites based on copoly (arylidene cyclohexanone) and CdS nanoparticles for photocatalytic and white LED applications KIA Marwa M. Sayed a, Mohamed A. Osman b, Ali A. Osman b, Essam R. Shaaban c ... Optical Materials 143, 114252 , 2023 2023 Citations: 4
Modification of conducting arylidene copolymers by formation of inclusion complexes: synthesis, characterization, and applications as highly corrosion inhibitors for mild steel HM Dardeer, M Abdel-Hakim, KI Aly, MM Sayed BMC chemistry 17 (1), 77 , 2023 2023 Citations: 8
Synthesis and structure design of novel unsaturated Copolyesters based on indazole moiety in the main chain with good thermal stability for catalytic activity and anti … HM Abd El-Lateef, MAAA El-Remaily, A Khodairy, MM Sayed, N Yehia, ... Journal of Molecular Structure 1273, 134345 , 2023 2023 Citations: 14
Exploration of Dihydrothieno[2,3- c ] Isoquinolines As Luminescent Materials and Corrosion Inhibitors IS Marae, MH Mahross, BS Al-Farhan, M Abdel-Hakim, EA Bakhite, ... ACS omega 7 (43), 38389-38399 , 2022 2022 Citations: 5
Synthesis, characterization and application of high adsorption performance of novel 1, 4-polyketone MM Sayed, IS Abd El-Hamid, H M. El-Bery, M Farrag, AK Abdelhakiem, ... Scientific Reports 12 (1), 16317 , 2022 2022 Citations: 12
Synthesis, physico-chemical characterization, and environmental applications of meso porous crosslinked poly (azomethine-sulfone) s MM Sayed, M Abdel-Hakim, MH Mahross, KI Aly Scientific Reports 12 (1), 12878 , 2022 2022 Citations: 17
MOST CITED SCHOLAR PUBLICATIONS
Salicylaldehyde azine-functionalized polybenzoxazine: Synthesis, characterization, and its nanocomposites as coatings for inhibiting the mild steel corrosion KI Aly, MG Mohamed, O Younis, MH Mahross, M Abdel-Hakim, MM Sayed Progress in Organic Coatings 138, 105385 , 2020 2020 Citations: 99
A facile synthetic route and dual function of network luminescent porous polyester and copolyester containing porphyrin moiety for metal ions sensor and dyes adsorption KI Aly, MM Sayed, MG Mohamed, SW Kuo, O Younis Microporous and Mesoporous Materials 298, 110063 , 2020 2020 Citations: 80
Novel conducting polymeric nanocomposites embedded with nanoclay: synthesis, photoluminescence, and corrosion protection performance KI Aly, O Younis, MH Mahross, O Tsutsumi, MG Mohamed, MM Sayed Polymer Journal 51 (1), 77-90 , 2019 2019 Citations: 69
Conducting copolymers nanocomposite coatings with aggregation-controlled luminescence and efficient corrosion inhibition properties KI Aly, O Younis, MH Mahross, EA Orabi, M Abdel-Hakim, O Tsutsumi, ... Progress in Organic Coatings 135, 525-535 , 2019 2019 Citations: 58
Liquid crystal polymers as luminescent coatings: Single-component white-light photoluminescence and corrosion inhibition O Younis, M Abdel-Hakim, MM Sayed, O Tsutsumi, KI Aly Journal of Luminescence 239, 118361 , 2021 2021 Citations: 32
Synthesis, physico-chemical characterization, and environmental applications of meso porous crosslinked poly (azomethine-sulfone) s MM Sayed, M Abdel-Hakim, MH Mahross, KI Aly Scientific Reports 12 (1), 12878 , 2022 2022 Citations: 17
Liquid crystalline polymers XII. Main chain thermotropic poly (arylidene-ether) s containing 4-tertiary-butyl-cyclohexanone moiety linked with polymethylene spacers KI Aly, MA Hussein, MM Sayed Liquid Crystals 40 (11), 1570-1580 , 2013 2013 Citations: 16
Liquid crystalline polymers XI. Main chain thermotropic poly (arylidene–ether) s containing 4-methyl-cyclohexanone moiety linked with polymethylene spacers KI Aly, AM Elkhawaga, MA Hussein, MM Sayed Liquid Crystals 40 (6), 711-725 , 2013 2013 Citations: 15
Synthesis and structure design of novel unsaturated Copolyesters based on indazole moiety in the main chain with good thermal stability for catalytic activity and anti … HM Abd El-Lateef, MAAA El-Remaily, A Khodairy, MM Sayed, N Yehia, ... Journal of Molecular Structure 1273, 134345 , 2023 2023 Citations: 14
Liquid crystalline polymers XIV. Main chain thermotropic copoly (arylidene-ether) s based on 4-methyl-cyclohexanone and 4-tertiary-butyl-cyclohexanone moieties linked with … KI Aly, MM Sayed Liquid Crystals 41 (1), 67-81 , 2014 2014 Citations: 13
Synthesis, characterization and application of high adsorption performance of novel 1, 4-polyketone MM Sayed, IS Abd El-Hamid, H M. El-Bery, M Farrag, AK Abdelhakiem, ... Scientific Reports 12 (1), 16317 , 2022 2022 Citations: 12
Novel polyesters based on indazole moiety: Synthesis, characterization and applicability as efficient inhibitors for acidic X-65-steel corrosion KI Aly, HM Abd El-Lateef, N Yehia, A Khodairy, MM Sayed, MAEAA Ali Reactive and Functional Polymers 166, 105001 , 2021 2021 Citations: 12
The enhanced photocatalytic performance of CPAA doping with different concentrations of titanium oxide nanocomposite against MB dyes under simulated sunlight irradiations MM Sayed, AM Aboraia, YA Kasem, NN Elewa, YAM Ismail, KI Aly Scientific Reports 14 (1), 12768 , 2024 2024 Citations: 8
Modification of conducting arylidene copolymers by formation of inclusion complexes: synthesis, characterization, and applications as highly corrosion inhibitors for mild steel HM Dardeer, M Abdel-Hakim, KI Aly, MM Sayed BMC chemistry 17 (1), 77 , 2023 2023 Citations: 8
Multifunctional polyamides: Designing rigid and flexible architectures for flame retardant, dye adsorbent, single-material white-light emitting, and color-tunable … O Younis, A Harby, EA Orabi, AMK El-Dean, MM Sayed, MS Tolba Reactive and Functional Polymers, 106597 , 2025 2025 Citations: 6
Unveiling the potential of a functionalized pyrrole-based polymer for efficient cadmium ion removal from wastewater: synthesis, characterization, and performance evaluation. MFKIA Marwa M. Sayed, Islam S. Abd El-Hamid, Haitham M. El-Bery Environmental Sciences Europe 36, 1-18 , 2024 2024 Citations: 6
Influential role of CdS film thickness in improving CdS/CdTe junction performance for solar cells: Structural, optical, and electrical characterizations ER Shaaban, MA Osman, AA Osman, MM Sayed, KI Aly Journal of Materials Science: Materials in Electronics 33 (7), 4051-4063 , 2022 2022 Citations: 6
Exploration of Dihydrothieno[2,3- c ] Isoquinolines As Luminescent Materials and Corrosion Inhibitors IS Marae, MH Mahross, BS Al-Farhan, M Abdel-Hakim, EA Bakhite, ... ACS omega 7 (43), 38389-38399 , 2022 2022 Citations: 5
Enhancing corrosion protection and luminescence in bio-based polyurethanes with fluorescent Azine segments MM Sayed, MS Abd Elrahman, M Abdel-Hakim, KI Aly Progress in Organic Coatings 200, 109051 , 2025 2025 Citations: 4
Synthesis, structure, and optical studies of nanocomposites based on copoly (arylidene cyclohexanone) and CdS nanoparticles for photocatalytic and white LED applications KIA Marwa M. Sayed a, Mohamed A. Osman b, Ali A. Osman b, Essam R. Shaaban c ... Optical Materials 143, 114252 , 2023 2023 Citations: 4