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Öğe Benzyl {2-[(2-(1H-Benzo[d][1,2,3]triazol-1-yl)-2-oxoethyl)amino]-2-oxoethyl} carbamate(Mdpi, 2014) Kucukbay, Hasan; Bugday, NesrinN-(Protected alpha-aminoacyl) benzotriazoles are powerful acylating agents, and they are used frequently for preparing peptides and their mimetics and conjugates. The present paper describes the synthesis and characterization of a new benzyl {2-[(2-(1H-benzo[d][1,2,3]triazol-1-yl)-2-oxoethyl)amino]-2-oxoethyl} carbamate.Öğe Boron-doped porous carbon material derived from ZIF-11: Investigation of cotton fabric supercapacitor and Li-ion battery performances(Wiley, 2022) Bugday, Nesrin; Altin, Serdar; Bulut, Fatih; Altin, Emine; Yasar, SedatNitrogen-doped porous carbon (NPC@ZIF-11) and boron-NPC (BNPC@ZIF-11) materials were synthesized by pyrolysis methods, and structural characterization of the compounds was carried out by scanning electron microscopy, transmission electron microscopy, Fourier-transform infrared spectroscopy, X-ray diffraction, Brunauer-Elmet-Teller technique, Raman spectroscopy, and inductively coupled plasma-mass spectrometry techniques. The ZIF-11 was converted to the NPC@ZIF11 by pyrolysis. BNPC@ZIF-11 was fabricated from NPC@ZIF-11 by pyrolysis in the presence of phenylboronic acid. The fabric supercapacitor, sandwich-type supercapacitor, and Li-ion battery performances of NPC@ZIF-11 and BNPC@ZIF-11 were investigated. The capacity of the Li-ion cell was found as 720 mAh g(-1) for the first cycle, and it was decreased to 250 mAh g(-1) after 100 cycles. The capacitance values of the cylindrical devices were 92 F g(-1) and 115.6 F g(-1), for C1 and C4000 in KOH electrolytes. The BNPC@ZIF-11 was used as an electrode material on cotton fabric, and the highest obtained capacitance was 72.8 mF for 0.1 mA, which is a promising result for wearable energy storage materials.Öğe Bridged NHC-Pd(II) complexes: Synthesis, DFT calculations, molecular docking, and investigation of catalytic and biological activities(Elsevier Science Sa, 2024) Firat, Tuba; Bugday, Nesrin; Yasar, Seyma; Boulebd, Houssem; Mansour, Lamjed; Koko, Waleed S.; Hamdi, NaceurSix palladium(II) ( 3a -f ) complexes of the type [Pd 2 ( mu-Cl) 2 (NHC)] were prepared by transmetallation of the corresponding Ag-NHC and [PdCl 2 (CH 3 CN) 2 ] complexes, and their structures were successfully characterised by 1 H NMR, 13 C NMR, HRMS, FTIR and elemental analysis. Density functional theory (DFT) calculations were also realised for the complexes. The prepared complexes were assessed for their catalytic activity in the C -H arylation of 2-isobuthylthiazole as well as for their biological activities. As results, these complexes were found to be potent catalysts in the creation of C5-arylated 2-isobuthylthiazole derivatives via C -H bond activation reaction. Furthermore, biological activity analysis revealed that complex 3a exhibits high cytotoxicity towards both human colon carcinoma cell lines (HCT-116) and hepatocellular carcinoma cell lines (HepG-2) with IC 50 values of 4.2 and 9.3 mu MmL -1 , respectively. Complex 3b also showed antioxidant activity comparable to that of BHT through DPPH and ABTS assays. Both complexes 3d and 3f also showed significant inhibitory activity towards the AChE enzyme with IC 50 values of 5.06 and 2.52 mu MmL -1 , respectively. Finally, all complexes showed excellent antiparasitic activity, with 3b exhibiting strong antileishmanial activity against both L. major promastigotes and amastigotes. The interaction between the most cytotoxic complexes and DNA, envisaged as a potential mechanism of toxicity, was explored by means of docking studies. In summary, these prepared complexes have the potential to serve as potent catalysts for the synthesis of arylated 2-isobutylthiazole and biologically active agents, paving the way for numerous prospects in the fields of medicinal chemistry and organic synthesis.Öğe C-H Bond activation of 2-isobutylthiazole at C5 position catalysed by Pd-N-heterocyclic carbene complexes(Elsevier Science Sa, 2021) Bugday, Nesrin; Khan, Siraj; Yasar, Sedat; Ozdemir, IsmailA highly efficient and effective protocol has been developed for the synthesis of C5-(hetero)arylated 2-isobutylthiazole derivatives. Four different palladium N-heterocyclic carbene (Pd-NHCs) complexes [Pd(mu-Cl)Cl(SIMes)](2) (2), (LCl2 Pd-SIMes) (3: L = PPh3; 4: L = Py; 5: L = 3-CHO-Py) were synthesized and used for the first time as a catalysts in direct C-H arylation reaction of 2-isobutylthiazole at C5 position. Utilizations of these catalytic systems, the arylation of 2-isobutylthiazole with substituted (hetero)aryl bromides efficiently proceeded at low catalyst loading (1 mol%) and without any additives such as PivOH under argon or aerobic conditions at 120 degrees C in a short time. Different substituted (hetero)aryl bromides, even some deactivated or highly sterically hindered (hetero)arylbromides, with a wide range of functional groups were successfully utilized under the optimum reaction conditions. In all cases, the C5 arylated 2-isobutylthiazoles were obtained in moderate to excellent yields. (C) 2021 Elsevier B.V. All rights reserved.Öğe Evaluation of NMR Results of Newly Synthesized Platinum-Based N- Heterocyclic Carbene Complexes(Wiley, 2023) Aslan, Sumeyye; Yuce, Hande; Yasar, Sedat; Bugday, Nesrin; Turkmen, Nese Basak; Eke, Benay Can; Unuvar, Songul[Abstract Not Available]Öğe Fabrication of a Stable and Highly Effective Anode Material for Li-Ion/Na-Ion Batteries Utilizing ZIF-12(Wiley-V C H Verlag Gmbh, 2024) Bugday, Nesrin; Wang, Haoji; Hong, Ningyun; Zhang, Baichao; Deng, Wentao; Zou, Guoqiang; Hou, HongshuaiTransition metal selenides (TMSs) are receiving considerable interest as improved anode materials for sodium-ion batteries (SIBs) and lithium-ion batteries (LIBs) due to their considerable theoretical capacity and excellent redox reversibility. Herein, ZIF-12 (zeolitic imidazolate framework) structure is used for the synthesis of Cu2Se/Co3Se4@NPC anode material by pyrolysis of ZIF-12/Se mixture. When Cu2Se/Co3Se4@NPC composite is utilized as an anode electrode material in LIB and SIB half cells, the material demonstrates excellent electrochemical performance and remarkable cycle stability with retaining high capacities. In LIB and SIB half cells, the Cu2Se/Co3Se4@NPC anode material shows the ultralong lifespan at 2000 mAg-1, retaining a capacity of 543 mAhg-1 after 750 cycles, and retaining a capacity of 251 mAhg-1 after 200 cycles at 100 mAg-1, respectively. The porous structure of the Cu2Se/Co3Se4@NPC anode material can not only effectively tolerate the volume expansion of the electrode during discharging and charging, but also facilitate the penetration of electrolyte and efficiently prevents the clustering of active particles. In situ X-ray difraction (XRD) analysis results reveal the high potential of Cu2Se/Co3Se4@NPC composite in building efficient LIBs and SIBs due to reversible conversion reactions of Cu2Se/Co3Se4@NPC for lithium-ion and sodium-ion storage. The Cu2Se/Co3Se4@NPC material, which is synthesized from Cu@ZIF-12, utilizes the advantages of Cu and Co metal complexes to facilitate the storage of lithium and sodium ions. Defect-rich N-doped amorphous carbon (NPC) improves electrical conductivity, and the Cu2Se/Co3Se4@NPC composite material demonstrates remarkable cycle stability while retaining high capacities in LIB and SIB half cells. imageÖğe Facile construction of a robust and recyclable laccase/metal-organic framework-808 with boosted stability for biodegradation of Reactive Blue 171 and Reactive Blue 198 from aqueous media(Elsevier, 2024) Bakar, Busra; Bugday, Nesrin; Birhanli, Emre; Boran, Filiz; Ulu, Ahmet; Yasar, Sedat; Yesilada, OzferLaccase enzyme sees application demand in many industries such as textile, food processing, wood processing, pharmaceutical, and chemical. However, it becomes difficult to maintain the enzymatic activity of laccase under harsh reaction conditions and even after several biocatalytic cycles. Therefore, suitably prescribed supports are crucial to ensure that the catalytic activity and reusability of the immobilized laccase are maintained at high levels. The present study highlights the development and dye decolorization application of an enzyme carrier matrix employing a Zr-based metal-organic framework (MOF), MOF-808, with hierarchical porosity for the immobilization of laccase from Trametes trogii . The immobilization efficiency for Lac/MOF-808 was found to be 70.83 +/- 1.98 %. Lac/MOF-808 exhibited optimal catalytic temperature at 60 degrees C, while the optimal catalytic pH was 4.5. Due to recoverable properties from the carrier matrix the recycle test was satisfactory for the Lac/MOF808, being reused 7 times without losses greater than 50 % of residual activity. Stored at 25 degrees C, Lac/MOF-808 retained 30 % of its activity during 4-weeks period. A kinetic study was carried out for Lac/MOF-808 monitoring the oxidation reaction of ABTS. The K-m value was 0.070 mM and the V-max was 87.7 mu mol min(-1) g(-1). Kinetic investigations, on the other hand, demonstrated a decrease in K m following immobilization, signifying a higher affinity for substrate. The Lac/MOF-808 maintained its decolorization efficiency even after eight reaction cycles, exhibiting a remarkable activity of 56.7 % and 77.2 % against Reactive Blue 171 and Reactive Blue 198, respectively. Hence, the described Lac/MOF-808 might be an ideal candidate for efficient dye decolorization applications.Öğe High-performance electrodes for Li-ion cell: Heteroatom-doped porous carbon/CoS structure and investigation of their structural and electrochemical properties(Wiley, 2022) Bugday, Nesrin; Altin, Emine; Altin, Serdar; Yasar, SedatAs an essential class of anode materials, the synthesis and characterization of CoS@ZIF-12-C composite anode materials are reported. The two-step synthesis of CoS nanoparticles embedded in N-doped porous carbon by using a metal-organic framework (MOF) as the template. After structural characterization of CoS@ZIF-12-C composite materials, the main phase was found as CoS with symmetry of P63mmc. Benefiting from the CoS embedded in porous carbon structure, the half Li-ion battery cell tests of CoS@ZIF-12-C composite materials were performed by a 2-electrode method using CR2032 cells, and the capacities of the cells were measured for 200 cycles using 300 mAg(-1) and 500 cycles using 1000 mAg(-1). The first discharge capacities of the cells for 1000 mAg(-1) were found as 458, 1178, and 815 mAhg(-1) for CoS@ZIF-12-C-T, T = 700, 800, and 900 degrees C, respectively. An unexpected capacity increase was observed for the CoS@ZIF-12-C-700 and CoS@ZIF-12-C-900 half cells during the cycling. Ex-situ x-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), and cyclic voltammetry (CV) analysis were performed after cycling of the cells for explanations of the capacity increase. Ex-situ XRD analysis of these cells showed phase transitions from crystalline to amorphous type structure, and ex-situ FTIR proves the preservation of the CoS phase during the cycling. A redox reaction mechanism was suggested to explain the cells' battery performance by ex-situ XRD analysis.Öğe Highly Active Fe3O4@SBA-15@NHC-Pd Catalyst for Suzuki-Miyaura Cross-Coupling Reaction(Springer, 2022) Akkoc, Mitat; Bugday, Nesrin; Altin, Serdar; ozdemir, Ismail; Yasar, SedatA novel Pd-NHC functionalized magnetic Fe3O4@SBA-15@NHC-Pd was synthesized and used as an efficient heterogeneous catalyst in the Suzuki-Miyaura C-C bond formation reactions. The Fe3O4@SBA-15@NHC-Pd characterized by X-Ray Diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS), Fourier Transform Infrared (FTIR) spectroscopy, Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Energy Dispersive X-ray analysis (EDX), Thermogravimetric Analysis (TGA), Differential Thermal Analysis (DTA). The Inductively Coupled Plasma-Optical emission spectroscopy (ICP-OES) analysis was used to determine the exact amount of Pd (0.33 wt%) in Fe3O4@SBA-15@NHC-Pd. The TEM images of the catalyst showed the existence of palladium nanoparticles immobilized in the catalyst's structure, while no reducing agent was used. The NHC moieties in the catalyst structure could be stabilize Pd(0) nanoparticles prevents agglomeration. The magnetic catalyst was effectively used in the Suzuki-Miyaura cross-coupling reaction of substituted phenylboronic acid derivatives with (hetero)aryl bromides in the presence of a K2CO3 at room temperature in aqueous media and magnetic catalyst could be simply extracted from the reaction mixture by an external magnet. Different aryl bromides were converted to coupled-products in excellent yields with spectacular TOFs values (up to 1,960,339 h(-1)); in the presence of 1 mg of Fe3O4@SBA-15@NHC-Pd catalyst (contains 3.1 x 10(-6) mol% Pd) at room temperature in aqueous media. After reusability experiments, it is found that this catalyst was effectively used up to ten times in the reaction with almost consistent catalytic efficiency. A decrease in the activity of the 10th reused catalyst was found as 9%. Graphic AbstractÖğe Magnetic Cu/Co nanoparticles supported on nitrogen-doped porous carbon derived from Cu/Co@aZIF: Investigation of catalytic activity and structural properties(Wiley, 2023) Bugday, Nesrin; Yasar, Sedat; Altin, Serdar; Duygulu, Ozgur; Onal, YunusBy calcining copper-doped amorphous zeolitic imidazolate framework (Cu/Co@aZIF), a novel magnetic nanoporous carbon composite (Cu/Co@NPC) material was produced, characterized by different spectroscopic techniques, and used for the first time as an efficient catalyst for the azide-alkyne cycloaddition (AAC) reaction and the reduction reaction of nitrophenol (RRN) under air in water. With this catalyst, the AAC and RRN reactions were conducted in aqueous solutions, and good to excellent yields of related products were synthesized in a short reaction time. The potential of the magnetic Cu/Co@NPC nanocatalyst for targeting RRN and AAC reactions was uncovered by studying specific substrates for RRN and AAC reactions. The Cu/Co@NPC magnetic nanocatalyst is recyclable at least five times, with just a drop of 6% and 22% in catalytic efficiency in RRN and AAC, respectively.Öğe Magnetite@MCM-41 nanoparticles as support material for Pd-N-heterocyclic carbene complex: A magnetically separable catalyst for Suzuki-Miyaura reaction(Wiley, 2021) Akkoc, Mitat; Bugday, Nesrin; Altin, Serdar; Yasar, SedatThe Magnetite@MCM-41@NHC@Pd catalyst was obtained with Pd metal bound to the NHC ligand anchored to the surface of Fe3O4@MCM-41. It was characterized by Fourier transform infrared (FTIR) spectroscopy, transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), energy disperse X-ray analysis (EDX), thermogravimetric analysis (TGA), differential thermal analysis (DTA), and scanning electron microscopy (SEM). The amount of Pd in the Magnetite@MCM-41@NHC@Pd was measure by inductively coupled plasma-optical emission spectroscopy (ICP-OES) analysis. The catalytic activity of Magnetite@MCM-41@NHC@Pd heterogeneous catalyst done on Suzuki-Miyaura reactions of aryl halides with different substituted arylboronic acid derivatives. All coupling reactions afforded excellent yields and up to 408404 Turnover Frequency (TOF) h(-1) in the presence of 2 mg of Magnetite@MCM-41@NHC@Pd catalyst (0.0564 mmol g(-1), 0.01127 mmol% Pd) at room temperature in 2-propanol/H2O (1:2). Moreover, Magnetite@MCM-41@NHC@Pd catalyst was recover by applying the magnet and reused for another reaction. The catalyst showed excellent structural and chemical stability and reused ten times without a substantial loss in its catalytic performance.Öğe N-heterocyclic carbene Pd(II) complex supported on Fe3O4@SiO2: Highly active, reusable and magnetically separable catalyst for Suzuki-Miyaura cross-coupling reactions in aqueous media(Elsevier Science Sa, 2021) Akkoc, Mitat; Bugday, Nesrin; Altin, Serdar; Kiraz, Nadir; Yasar, Sedat; Ozdemir, IsmailA new type magnetic nano Fe3O4@SiO2@NHC@Pd-MNPs heterogeneous catalyst was fabricated and characterized by Fourier Transform Infrared (FTIR) spectroscopy, Transmission Electron Microscopy (TEM), X-Ray Diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS), Energy Disperse X-ray analysis (EDX), Thermogravimetric Analysis (TGA), Differential Thermal Analysis (DTA), and Scanning Electron Microscopy (SEM). The loading amount of Palladium (Pd) to magnetic nano Fe3O4@SiO2@NHC@Pd-MNPs was measured by Inductively Coupled Plasma-Optical Emission Spectroscopy (ICP-OES) analysis. The catalytic activity of magnetic nano Fe3O4@SiO2@NHC@Pd-MNPs heterogeneous catalyst was examined on Suzuki-Miyaura cross-coupling reactions of aryl halides with different substituted arylboronic acid derivatives. All coupling reactions yielded excellent results and high TOF (up to 76528 h(-1)) in the presence of 2 mg of Fe3O4@SiO2@NHC@Pd-MNPs catalyst (0.0197 mmolg(-1), 0.00394 mmol%Pd) at 80 degrees C in 2-propanol/H2O (1:2). In addition, the magnetic nano Fe3O4@SiO2@NHC@Pd-MNPs catalyst was easily recovered by using an external Nd-magnet and reused for the Suzuki cross-coupling reactions. The catalyst showed strong structural and chemical stability and was reused six times without losing its catalytic activity substantially. (C) 2021 Elsevier B.V. All rights reserved.Öğe Palladium nanoparticle supported on nitrogen-doped porous carbon: Investigation of structural properties and catalytic activity on Suzuki-Miyaura reactions(Wiley, 2021) Bugday, Nesrin; Altin, Serdar; Yasar, SedatNovel palladium-doped nanoporous carbon composite material obtained via thermolysis of amorphous zeolitic imidazolate framework (aZIF) was synthesized and used as an efficient catalyst on Suzuki-Miyaura cross-coupling reactions of aryl bromides. With this developed catalytic system, the Suzuki-Miyaura cross-coupling reaction was accomplished in aqueous solutions, and biaryls were obtained in good to excellent yields in a short reaction time. The APC-750@Pd catalyst was characterized by Fourier Transform Infrared spectroscopy (FTIR), X-ray Diffraction (XRD), Scanning Electron Eicroscopy (SEM), X-ray Photoelectron Spectroscopy (XPS), Transmission Electron Microscopy (TEM), Thermal Gravimetric Analysis (TGA), Differential Thermal Analysis (DTA), Inductively Coupled Plasma Mass Spectrometry (ICP-MS) and Brunauer-Emmett-Teller (BET) analysis tecniques. N-doped porous carbon material (NPC-1000) was synthesized by thermolysis from aZIF. Activated porous carbon material (APC-750) was fabricated via fused at 750 degrees C with KOH from NPC-1000. The APC-750@Pd was obtained as a result of the interaction of APC-750 and PdCl2 in deionized water. The cross-coupling reaction of different aryl bromides with phenylboronic acid was investigated to show the potential of the APC-750@Pd in the Suzuki-Miyaura cross-coupling reactions. The APC-750@Pd catalyst could be recycled at least five times with a 15% loss of catalytic efficiency in this catalytic system.Öğe Pd-N-heterocyclic carbene complex catalysed C-H bond activation of 2-isobutylthiazole at the C5 position with aryl bromides(Royal Soc Chemistry, 2021) Khan, Siraj; Bugday, Nesrin; Yasar, Sedat; Ullah, Naseem; Ozdemir, IsmailAn effective and efficient catalytic system has been reported for the synthesis of C5-arylated 2-isobutylthiazoles. Pd-N-heterocyclic carbene complexes like [Pd(mu-Cl)Cl(SIPr)](2) (2) and (LCl2Pd-SIPr) (3: L = PPh3, 4: L = Py; 5: L = 3-CHO-Py) were synthesized and characterized by H-1, C-13, P-31 NMR, LC-MS/MS, elemental analysis, and FTIR spectroscopy. These Pd-N-heterocyclic carbene complexes were assessed for the first time as catalysts for the C-H arylation reaction of 2-isobutylthiazole at the C5 position with different (hetero)aryl bromides. The catalytic system showed a low catalyst loading (1 mol%) and did not require the use of additional additives such as pivalic acid. The catalytic system developed with these catalysts enables the synthesis of fine chemicals in high yields under aerobic or anaerobic conditions. All complexes showed moderate to good yields in the C5 direct arylation of 2-isobutylthiazole, while complex 2 exhibited higher catalytic activity than the other complexes.Öğe Pd-NHC complex catalyzed C-H bond activation reactions of caffeine and 2-isobuthylthiazole(Elsevier, 2022) Bugday, Nesrin; Khan, Siraj; Yasar, Sedat; Bulut, Fatih; Boulebd, Houssem; Karabiyik, Hande; Karabiyik, HasanA series of new Pd-NHC complexes were synthesized, characterized, and utilized as catalysts on 8-(hetero)ary-lation of xanthines and C-5 (hetero)arylation of 2-isobuthylthiazole. All the synthesized derivatives were characterized by NMR, Q-TOF-LC/MS, FTIR, and X-ray (for 4a, 5a, and 5b) analysis. In addition, DFT calculations and computational NBO studies for Pd-NHC complexes were examined, and HOMO and LUMO energy levels and electron density of each Pd-NHC complex were defined. 4a-c and 5a-b complexes showed good catalytic activity in C-H bond activation reactions. DFT studies have also been conducted to examine the reaction mechanism following the CMD pathway. Complex 5a was chosen as a representative catalyst for the reaction of unsubstituted phenyl with caffeine and 2-isobuthylthiazole. Although the delta E values of the complexes are so close, slight difference in the catalytic activity were observed for 4a-c and 5a-b. Since this low delta E value facilitates the oxidative addition reaction of (hetero)aryl bromides, thanks to this catalytic system, new 8-(hetero)aryl xan-thines and 5-(hetero)aryl thiazole derivatives could be synthesized with high yields and low catalyst loading.Öğe Pioneering electrochemical detection unveils erdafitinib: a breakthrough in anticancer agent determination(Springer Wien, 2024) Yildir, Merve Hatun; Genc, Asena Ayse; Erk, Nevin; Bouali, Wiem; Bugday, Nesrin; Yasar, Sedat; Duygulu, OzgurThe successful fabrication is reported of highly crystalline Co nanoparticles interconnected with zeolitic imidazolate framework (ZIF-12) -based amorphous porous carbon using the molten-salt-assisted approach utilizing NaCl. Single crystal diffractometers (XRD), and X-ray photoelectron spectroscopy (XPS) analyses confirm the codoped amorphous carbon structure. Crystallite size was calculated by Scherrer (34 nm) and Williamson-Hall models (42 nm). The magnetic properties of NPCS (N-doped porous carbon sheet) were studied using a vibrating sample magnetometer (VSM). The NPCS has a magnetic saturation (Ms) value of 1.85 emu/g. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analyses show that Co/Co3O4 nanoparticles are homogeneously distributed in the carbon matrix. While a low melting point eutectic salt acts as an ionic liquid solvent, ZIF-12, at high temperature, leading cobalt nanoparticles with a trace amount of Co3O4 interconnected by conductive amorphous carbon. In addition, the surface area (89.04 m2/g) and pore architectures of amorphous carbon embedded with Co nanoparticles are created using the molten salt approach. Thanks to this inexpensive and effective method, the optimal composite porous carbon structures were obtained with the strategy using NaCl salt and showed distinct electrochemical performance on electrochemical methodology revealing the analytical profile of Erdatifinib (ERD) as a sensor modifier. The linear response spanned from 0.01 to 7.38 mu M, featuring a limit of detection (LOD) of 3.36 nM and a limit of quantification (LOQ) of 11.2 nM. The developed sensor was examined in terms of selectivity, repeatability, and reproducibility. The fabricated electrode was utilized for the quantification of Erdafitinib in urine samples and pharmaceutical dosage forms. This research provides a fresh outlook on the advancements in electrochemical sensor technology concerning the development and detection of anticancer drugs within the realms of medicine and pharmacology.Öğe Porous carbon prepared by zeolitic imidazolate framework (ZIF-7-III) as the precursor for supercapacitor applications in different electrolytes(Wiley, 2022) Bugday, Nesrin; Altin, Serdar; Yasar, SedatZIF-7-III and its nitrogen-doped porous carbon (NPC) structures were synthesized for the first time by direct carbonization and fused with KOH in an argon atmosphere. The morphology and structural characterization of NPC materials were performed by scanning electron microscopy (SEM), Raman, Fourier transform infrared (FT-IR), and X-ray diffraction (XRD) analysis, and their supercapacitive properties were examined as a device form for the first time. The characteristic peak at 2 theta = 9.1 degrees in the XRD pattern indicates pure ZIF-7-III phase obtained, and impurity was not observed in the phase of ZIF-7-III. Two broad peaks at nearly 25 degrees and 44 degrees might belong to graphite and its diffractions for the NPC structures. The FT-IR analysis of ZIF-7-III and NPC materials matches well with the reported literature. Raman spectra of the activated NPC material show two prominent peaks located around 1357 and 1592 cm(-1). A nonporous dense phase with a 2D stacked-layered structure was detected on the structure of ZIF-7-III. The morphology of activated NPC material turns into the 2D structure to the 3D dodecahedron morphology with an increase in the specific surface area. The cyclic voltammetry and galvanostatic cycling measurements of NPC structures were investigated on the device system in different electrolytes such as KOH, NaOH, LiOH, and Na2SO4. The electrochemical performance of NPC compounds was presented comparatively in a device, and the KOH-activated NPC material showed a higher specific surface area (709.7 m(2)/g) and higher capacitance value (104 Fg(-1) at 0.4 Ag-1 and 118 Fg(-1) for 5 mV/s) with low capacitive fade after 4000 charge/discharge cycles among others.Öğe Porous carbon-supported CoPd nanoparticles: High-performance reduction reaction of nitrophenol(Wiley, 2022) Bugday, Nesrin; Altin, Serdar; Yasar, SedatMagnetic porous carbon composite was synthesized from zeolitic imidazolate framework (ZIF-12) and used as a support material to fabricate CoPd nanoparticles decorated NPC@ZIF-12 nanocatalyst. The structure of CoPd@NPC@ZIF-12 has been characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman, Brunauer-Emmett-Teller (BET), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), and inductively coupled plasma mass spectrometry (ICP-MS) techniques. The catalytic reduction reaction of nitrophenols (NP) to aminophenols (AP) was successfully achieved by CoPd@NPC@ZIF-12 nanocatalyst. When the catalytic performance of the catalyst was compared with other reported catalysts, the performance of the catalyst and reusability was found much better. This better catalytic activity of the CoPd@NPC@ZIF-12 nanocatalyst may be attributed to facilitating the mass transfer of the nitro compound and the wettability of catalyst caused by the high nitrogen content of the carbon matrix and to the synergistic effect of Co and Pd nanoparticles. The CoPd@NPC@ZIF-12 nanocatalyst showed perfect catalytic activity in the reduction of 4-nitrophenol (4-NP), 3-nitrophenol (3-NP), and 2,4-nitrophenol (2,4-DNP) reactions with high turnover frequency (TOF) values of 1679, 2687, and 1014 h(-1), respectively. The reusability experiments of the CoPd@NPC@ZIF-12 nanocatalyst showed that the catalytic activity of the CoPd@NPC@ZIF-12 nanocatalyst was almost retained after 10 consecutive reaction runs. The SEM, XRD, and FTIR analyses of the 10 times used CoPd@NPC@ZIF-12 nanocatalyst showed that there were limited changes in the structure of the CoPd@NPC@ZIF-12 nanocatalyst. This highly active, magnetically separable, and recyclable CoPd@NPC@ZIF-12 catalyst exhibits better catalytic activity than commercial Pd/C catalysts.Öğe The production and electrochemical properties of N-doped porous carbon structure-based supercapacitor coin cells and flexible wristbands(Elsevier, 2022) Bugday, Nesrin; Altin, Serdar; Karadag, Teoman; Yasar, SedatAmorphous zeolitic imidazolate framework (aZIF) materials were used for N-doped porous carbon material (NPC-1000) by thermolysis process and the KOH activation process was used to obtain high surface area (APC750). Symmetric supercapacitor devices were assembled with NPC-1000 and APC-750 as electrodes. The capacitance of the devices exhibited good specific capacitance 30.3 and 63.3 F/g, 1 V, respectively, and very high cycling performance (4000 continuous charge-discharge) with 0.13 capacitive fade. Due to the need for portable and wearable electronics in daily life, flexible or wearable energy storage devices have become the focus of attention in recent years. To demonstrate the practical application of the symmetric supercapacitors, the electrochemical properties of APC-750 were investigated and it was used for the assembling of a flexible wristband. The angle dependence of the capacity of a flexible wristband was analyzed and it is found that the best capacity was obtained for the angel of 180. The results showed that activated porous carbon material (APC-750) synthesized from aZIF has a high potential for supercapacitor applications when compared the NPC-1000 in this study.Öğe Synthesis and carbonic anhydrase inhibitory properties of novel 4-(2-aminoethyl)benzenesulfonamide-dipeptide conjugates(Academic Press Inc Elsevier Science, 2019) Kucukbay, Hasan; Bugday, Nesrin; Kucukbay, F. Zehra; Berrino, Emanuela; Bartolucci, Gianluca; Del Prete, Sonia; Capasso, ClementeThirty novel sulfonamide derivatives incorporating dipeptide were synthesized by facile acylation through benzotriazole mediated reactions and their structures were identified by H-1 NMR, C-13 NMR, MS and FT-IR spectroscopic techniques and elemental analysis. The carbonic anhydrase (CA, EC 4.2.1.1) inhibitory activity of the new compounds was assessed against four human (h) isoforms, hCA I, hCA II, hCA IV and hCA XII. Most of the synthesized compounds showed excellent in vitro carbonic anhydrase inhibitory properties comparable to those of the clinically used drug acetazolamide (AAZ). The new unprotected dipeptide-sulfonamide conjugates showed very effective inhibitory activity, in the low nanomolar range against II and XII, being less effective as hCA I and IV inhibitors. Four of the thirty compounds also showed strong inhibitory activity against hCA XII compared to AAZ.