WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

Permanent URI for this collectionhttps://hdl.handle.net/11147/7150

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2023 - 20252

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Author: search.filters.author.Emrullahoglu, MustafaDepartment: search.filters.department.İzmir Institute of Technology

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  • Article
    Design, Synthesis, and Biological Evaluation of Novel Water-Soluble Quinoline-Based Conjugates with Antioxidant, Antimicrobial, and DNA-Binding Activities
    (Society of Chemists and Technologists Madeconia, 2025) Emrullahoğlu, Mustafa; Okumus, Veysi; Emrullahoglu, Mustafa; Gumus, Selcuk; 04.04. Department of Photonics; 04. Faculty of Science; 01. Izmir Institute of Technology
    Considering the extremely valuable biological and pharmaceutical properties of quinolines, novel water-soluble quinoline-based conjugates were designed and synthesized. In vitro antioxidant activities, such as free radical scavenging, metal chelating, and reducing-power activities, of the newly synthesized compounds (WQ-1, WQ-2, WQ-3, WQ-4, and WQ-5) were determined. Although the highest scavenging activity (41.21 +/- 1.18%) and chelating activity (23.53 +/- 0.97%) at a concentration of 500.0 mu g/ml were observed in WQ-4, it was determined that WQ-5 had the highest reducing-power ability (0.417 +/- 0.0116). The synthesized compounds were also tested for their antimicrobial activities against two Grampositive and two Gram-negative bacteria, and it was determined that only WQ-3 showed low activity against Enterococcus hirae and Staphylococcus aureus. DNA-binding activities of the compounds were also studied using calf thymus DNA (CT-DNA). Additionally, the three-dimensional geometries and some electronic properties of the synthesized compounds were investigated with the density functional theory approach at B3LYP/6-31++G(d,p) level of theory.
  • Article
    Citation - Scopus: 3
    A Reaction-Based Scenario for Fluorescence Probing of Au(iii) Ions in Human Cells and Plants
    (Royal Soc Chemistry, 2023) Eren, Merve Cevik; Emrullahoğlu, Mustafa; Dartar, Suay; Varlıklı, Canan; Kaya, Beraat Umur; Varlikli, Canan; Emrullahoglu, Mustafa; 04.01. Department of Chemistry; 01. Izmir Institute of Technology; 04.04. Department of Photonics; 04. Faculty of Science
    A BODIPY-based fluorophore decorated with a gold specific reactive handle (e.g., 2-alkynylallyl alcohol) displayed a ratiometric fluorescence change in response to Au3+ ions with extraordinary selectivity over other competing metal species, including Hg2+, Cu2+, Zn2+ and Pd2+. By way of a gold-catalyzed intramolecular cyclisation-isomerisation reaction sequence, a BODIPY construct with an extended p-conjugation transformed into a new structure with a relatively short p-system. This unique chemical transformation was accompanied by, and resulted in, a dramatic shift in the emission and absorption wavelength, which could be monitored as distinct changes in the color of the solution's emission. Apart from its outstanding analytical performance in solution, including a quick response time (<10 s), unique specificity, a high-fold ratio-metric change (62-fold), and a remarkably low detection limit (358 nM), the probe also proved useful in monitoring Au3+ ions in human cells and plants (e.g., Nicotiana benthamiana).