Usama El‐Ayaan
About
Usama El‐Ayaan is a scholar working on Oncology, Organic Chemistry and Materials Chemistry.
According to data from OpenAlex, Usama El‐Ayaan has authored 45 papers receiving a total of 1.1k indexed citations (citations by other indexed papers that have themselves been cited), including 33 papers in Oncology, 29 papers in Organic Chemistry and 14 papers in Materials Chemistry. Recurrent topics in Usama El‐Ayaan's work include Metal complexes synthesis and properties (33 papers), Inorganic and Organometallic Chemistry (11 papers) and Thermal and Kinetic Analysis (10 papers). Usama El‐Ayaan is often cited by papers focused on Metal complexes synthesis and properties (33 papers), Inorganic and Organometallic Chemistry (11 papers) and Thermal and Kinetic Analysis (10 papers). Usama El‐Ayaan collaborates with scholars based in Egypt, Saudi Arabia and Japan. Usama El‐Ayaan's co-authors include Yutaka Fukuda, Alaa A.‐M. Abdel‐Aziz, Magdy M. Youssef, Shar S. Al‐Shihry, Wolfgang Linert, Tawfik H. Rakha, Tarek A. Yousef, I.M. Gabr, Gaber M. Abu El‐Reash and Reginald F. Jameson and has published in prestigious journals such as European Journal of Medicinal Chemistry, Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy and Journal of Inorganic Biochemistry.
In The Last Decade
Usama El‐Ayaan
43 papers receiving 1.1k citations
Peers — A (Enhanced Table)
Peers by citation overlap · career bar shows stage (early→late) cites · hero ref
| Name | h | Career | Trend | Papers | Cites | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| Usama El‐Ayaan Egypt | 21 | 737 | 670 | 304 | 289 | 191 | 45 | 1.1k | ||
| Mozaffar Asadi Iran | 20 | 714 1.0× | 670 1.0× | 312 1.0× | 350 1.2× | 163 0.9× | 68 | 1.4k | ||
| Ajaykumar D. Kulkarni India | 18 | 791 1.1× | 745 1.1× | 247 0.8× | 164 0.6× | 132 0.7× | 26 | 1.1k | ||
| Maurício Lanznaster Brazil | 21 | 415 0.6× | 733 1.1× | 513 1.7× | 281 1.0× | 317 1.7× | 47 | 1.3k | ||
| Chinnasamy Jayabalakrishnan India | 23 | 1.0k 1.4× | 1.1k 1.6× | 341 1.1× | 227 0.8× | 168 0.9× | 65 | 1.4k | ||
| Ahmad Amiri Iran | 21 | 406 0.6× | 471 0.7× | 312 1.0× | 390 1.3× | 249 1.3× | 65 | 1.1k | ||
| Ayman A. Abdel Aziz Egypt | 19 | 625 0.8× | 656 1.0× | 206 0.7× | 236 0.8× | 176 0.9× | 50 | 1.1k | ||
| Pranjit Barman India | 24 | 1.2k 1.6× | 538 0.8× | 198 0.7× | 209 0.7× | 135 0.7× | 96 | 1.5k | ||
| İbrahim Kani Türkiye | 21 | 617 0.8× | 235 0.4× | 422 1.4× | 454 1.6× | 250 1.3× | 64 | 1.1k | ||
| M.K. Bharty India | 20 | 650 0.9× | 654 1.0× | 408 1.3× | 159 0.6× | 305 1.6× | 112 | 1.1k | ||
| Hamid Golchoubian Iran | 18 | 573 0.8× | 544 0.8× | 293 1.0× | 352 1.2× | 250 1.3× | 99 | 1.1k |
Countries citing papers authored by Usama El‐Ayaan
Since
Specialization
Citations
This map shows the geographic impact of Usama El‐Ayaan's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Usama El‐Ayaan with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Usama El‐Ayaan more than expected).
Fields of papers citing papers by Usama El‐Ayaan
Since
Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences
This network shows the impact of papers produced by Usama El‐Ayaan. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Usama El‐Ayaan. The network helps show where Usama El‐Ayaan may publish in the future.
Co-authorship network of co-authors of Usama El‐Ayaan
This figure shows the co-authorship network connecting the top 25 collaborators of Usama El‐Ayaan. A scholar is included among the top collaborators of Usama El‐Ayaan based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Usama El‐Ayaan. Usama El‐Ayaan is excluded from the visualization to improve readability, since they are connected to all nodes in the network.
All Works
1.
El‐Ayaan, Usama, et al.. (2025). Structure elucidation, cyclic voltammetry, fluorescence, DFT, biological potency, and in silico profiling of new bivalent transition metal coordination compounds of 7-amino-4H-pyrazolo[3,4-b]pyridinone Ligand. Journal of Molecular Structure. 1348. 143427–143427.
2.
El‐Sherbeny, Magda A., Usama El‐Ayaan, Yasmeen G. Abou El‐Reash, & Gaber M. Abu El‐Reash. (2024). Characterization, DFT, DNA, Biological Applications, and In Silico Studies of Mn(II), VO(II), Pd(II), and Cd(II) Complexes Derived From Chromone Isonicotinic Hydrazone Ligand. Applied Organometallic Chemistry. 39(2).
3.
El‐Ayaan, Usama, et al.. (2024). Synthesis, Characterization, Biological Potency, and Molecular Docking of Co 2+ , Ni 2+ , and Pd 2+ Complexes Derived From Carbohydrazone Ligand and Its Application in Dye Removal. Applied Organometallic Chemistry. 39(2).
4.
Gouda, Mohamed, Usama El‐Ayaan, & Magdy M. Youssef. (2014). Synthesis and Biological Activity of Drug Delivery System Based on Chitosan Nanocapsules. 3(4). 148–158.
5.
El‐Metwaly, Nashwa M., Reem K. Arafa, & Usama El‐Ayaan. (2013). Molecular modeling, spectral, and biological studies of 4-formylpyridine-4 N-(2-pyridyl) thiosemicarbazone (HFPTS) and its Mn(II), Fe(III), Co(II), Ni(II), Cu(II), Cd(II), Hg(II), and UO2(II) complexes. Journal of Thermal Analysis and Calorimetry. 115(3). 2357–2367.
6.
Yousef, Tarek A., Gaber M. Abu El‐Reash, Tawfik H. Rakha, & Usama El‐Ayaan. (2011). First row transition metal complexes of (E)-2-(2-(2-hydroxybenzylidene) hydrazinyl)-2-oxo-N-phenylacetamide complexes. Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy. 83(1). 271–278.
7.
El‐Ayaan, Usama, et al.. (2010). Transition metal complexes of Vanillin-4N-(2-pyridyl) thiosemicarbazone (H2VPT); thermal, structural and spectroscopic studies. Journal of Molecular Structure. 969(1-3). 33–39.
8.
El‐Ayaan, Usama, Nashwa M. El‐Metwaly, Magdy M. Youssef, & Serry A. A. El Bialy. (2007). Perchlorate mixed–ligand copper(II) complexes of β-diketone and ethylene diamine derivatives: Thermal, spectroscopic and biochemical studies. Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy. 68(5). 1278–1286.
9.
El‐Ayaan, Usama, Alaa A.‐M. Abdel‐Aziz, & Shar S. Al‐Shihry. (2007). Solvatochromism, DNA binding, antitumor activity and molecular modeling study of mixed-ligand copper(II) complexes containing the bulky ligand: Bis[N-(p-tolyl)imino]acenaphthene. European Journal of Medicinal Chemistry. 42(11-12). 1325–1333.
10.
El‐Ayaan, Usama, et al.. (2007). Synthesis, thermal and spectral studies of first-row transition metal complexes with Girard-T reagent-based ligand. Journal of Molecular Structure. 871(1-3). 14–23.
11.
El‐Ayaan, Usama, et al.. (2006). Synthesis, thermal and spectral studies of first-row transition metal complexes with girard P reagent-based ligand. Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy. 68(2). 211–219.
12.
El‐Ayaan, Usama & I.M. Gabr. (2006). Thermal, spectroscopic, and solvent influence studies on mixed-ligand copper(II) complexes containing the bulky ligand: Bis[N-(p-tolyl)imino]acenaphthene. Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy. 67(1). 263–272.
13.
El‐Ayaan, Usama & Alaa A.‐M. Abdel‐Aziz. (2005). Synthesis, antimicrobial activity and molecular modeling of cobalt and nickel complexes containing the bulky ligand: bis[N-(2,6-diisopropylphenyl)imino] acenaphthene. European Journal of Medicinal Chemistry. 40(12). 1214–1221.
14.
El‐Ayaan, Usama. (2004). Synthesis and Structural Studies of Group 2B Transition Metal Complexes with the Bulky Nitrogen Ligand Bis[N-(2,6-diisopropylphenyl) imino]acenaphthene. Monatshefte für Chemie - Chemical Monthly. 135(8).
15.
El‐Ayaan, Usama, et al.. (2003). Structural studies of mixed-ligands copper(II) and copper(I) complexes with the rigid nitrogen ligand: bis[N-(2,6-diisopropylphenyl)imino]acenaphthene. Journal of Molecular Structure. 645(2-3). 205–212.
16.
El‐Ayaan, Usama, et al.. (1999). Kinetic Studies on the Formation and Decomposition of Bis(peroxo)oxochromium(VI) in Aqueous Solution. Journal of Chemical Research Synopses. 521–521.
17.
El‐Ayaan, Usama, et al.. (1999). Kinetic Studies on the Formation and Decomposition of Bis(peroxo)oxochromium(VI) in Aqueous Solution. Journal of Chemical Research. 23(9). 521–521.
18.
Renz, Franz, et al.. (1999). Anisotropic Effect after Stretching of the Spin-Crossover Compound [Fe(II)(2,6-bis-(benzimidazol-2′-yl)pyridine)2] (C1O4)2 in Polyvinylalcohol Polymer Matrix. Molecular crystals and liquid crystals science technology. Section A, Molecular crystals and liquid crystals. 335(1). 531–540.
19.
Boča, Roman, P. Baran, Ľubor Dlháň, et al.. (1997). Complete spin crossover in tris(pyridylbenzimidazole) iron(II). Polyhedron. 16(1). 47–55.
20.
El‐Reash, Gaber M. Abu, et al.. (1994). Synthesis and characterization of chromium(III), manganese(II), iron(III), cobalt(II), nickel(II), copper(II), cadmium(II) and dioxouranium(VI) complexes of 4(2-pyridyl)-1-(2,4-dihydroxybenzaldehyde)-3-thiosemicarbazone. OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information). 33.
Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.
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