Browsing by Author "Erdemir, Serkan"

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Citation - WoS: 13
Citation - Scopus: 14
Calixarene-Tethered Textile Fabric for the Efficient Removal of Hexavalent Chromium From Polluted Water
(ELSEVIER, 2021) Özçelik, Egemen; Mercan Sevgili, Emine; Erdemir, Serkan; Karaman, Mustafa; Tabakcı, Mustafa
This study describes the tethering of dimethylamionomethyl bonded calixarene (DMAM-calixarene) onto cotton fabric surface functionalized with poly(glycidyl methacrylate) (PGMA) linker layer using initiated chemical vapor deposition (iCVD) technique and the efficient adsorption capability of DMAM-calixarene functional textiles for the toxic hexavalent chromium from polluted water. The characterization of DMAM-calixarene-tethered textile fabric was performed by FTIR and XPS spectroscopy. Cr(VI) solutions was passed over packed DMAMcalixarene-tethered textile fabric adsorbent and the highest adsorption was observed at pH 2 in dichromate anion form of COS. The regeneration and selectivity studies indicate that the DMAM-calixarene-tethered textile fabric has outstanding adsorbent features in used experimental conditions for hexavalent chromium. Moreover, it was observed that both H-bonding and electrostatic interactions were significant factors in the dichromate anion adsorption process. Thus, this study clearly revealed that any DMAM-calixarene-tethered textile fabric can be easily used as a selective hexavalent chromium capture filter in geographic regions lacking appropriate wastewater purification systems.
Citation - WoS: 8
Citation - Scopus: 7
Fluorescence Switchable Sensor Enabled by a Calix[4]arene-Cu(ii) Complex System for Selective Determination of Itraconazole in Human Serum and Aqueous Solution
(Elsevier, 2022) Akceylan, Ezgi; Erdemir, Serkan; Tabakçı, Mustafa; Sivrikaya, Abdullah; Tabakçı, Begüm
A switchable fluorescence sensor based on a calix (Monapathi et al., 2021) [4]arene:Cu2+ complex (FLCX/Cu) has been developed for the detection of itraconazole (ITZ) with high sensitivity and specificity. For the devel-opment of the sensor, the selective complexation of a fluorescent calix (Monapathi et al., 2021) [4]arene de-rivative (FL-CX) with the Cu2+ ion causing fluorescence quenching was utilized. In addition, the sensor properties of the FLCX/Cu prepared were investigated. For this purpose, various substances (selected anions, cations, and drugs) with which ITZ can be found together were studied in an aqueous solution. Limit of detection (LOD) and limit of quantification (LOQ) values were determined in the range of 1.00-60.0 mu g/L as 3.34 mu g/L and 11.1 mu g/L for ITZ, respectively. Moreover, the real sample analyses were performed in human serum and tablet form. Furthermore, the effect of some possible serum contents on sensor performance was also studied. All these studies confirmed the development of a simple, precise, accurate, reproducible, highly sensitive, and very stable fluorescence sensor.
Citation - WoS: 5
Citation - Scopus: 5
A Highly Sensitive Colorimetric and Fluorogenic Detection of Copper(ii) Ion Based on New Picolylamine-Armed Calix[4]arene
(Elsevier Sci Ltd, 2023) Tabakcı, Begüm; Özçelik, Egemen; Erdemir, Serkan; Tabakcı, Mustafa
In this study, two-and tetra-functionalized with bis(2-picolyl)amine calix[4]arene derivatives (2-PACX and 4-PACX) were synthesized, and their structures were confirmed by 1H NMR, 13C NMR, FT-IR and TOF-MS spec-troscopies. Cation sensing behaviors of them were investigated towards several cations such as Fe2+, Al3+, Cr3+, Hg2+, Mn2+, Cu2+, Co2+, Cd2+, Zn2+, Ni2+, Ag+, Mg2+, Ca2+, Li+, Na+, and K+. The results showed that 4-PACX was an effective colorimetric sensor against Cu2+ ions. The binding constant (K) value of the complexation between 4-PACX and Cu2+ ion was calculated as 4.62x108 M-2 and the detection limit value of the sensor as 5.1 mu M. Moreover, the fluorescence studies demonstrated that 4-PACX has great fluorogenic sensor potential with 0.16 mu M of detection limit. As a result, good yield, large coupling constant with Cu2+ ion (Ka = 13.972), applicability to aqueous samples, low detection limit, and high sensitivity were some of the advantages of the obtained sensor.
Citation - WoS: 16
Citation - Scopus: 17
Nano-Scale Selective and Sensitive Optical Sensor for Metronidazole Based on Fluorescence Quenching: 1h-Phenanthro[9,10 Fluorescent Probe
(ELSEVIER, 2021) Şimşir, Evin Ayşegül; Erdemir, Serkan; Tabakcı, Mustafa; Tabakcı, Begüm
It is crucial to determine and control the metronidazole (MET) ingredient in food and pharmaceuticals for human health and food safety. Even though many sensors have been previously reported to detect MET, there is still a need for a highly selective and sensitive, easy, fast, cost-effective sensor in this area. Herein, we report a fluorescent calix[4]arene derivative (PIMC) for highly selective and sensitive and facile and rapid MET detection based on fluorescence (FL) quenching. The highest FL quenching occurs when PIMC is exposed to MET solution at 400 nm (lambda(ex) = 340). Owing to the quenching efficacy of MET linearly up to 5.5 x 10(4) nM was obtained a detection limit of 2.44 nM. Besides, interferences of other pharmaceuticals and ions on probe performance were investigated. The FL probe was successful in MET detection without the assistance of any separation techniques in a pharmaceutical sample (tablet) with an acceptable recovery of 101.3%. The applicability of the current probe as a paper-based sensor to MET detection has been successfully tested. As a result, the proposed probe presents a fast and suitable strategy to sensitive and selective detect MET and proves a good potential for practical applications, especially pharmaceutical preparations. (C) 2021 Elsevier B.V. All rights reserved.
Citation - WoS: 16
Citation - Scopus: 15
Qcm Sensors Coated With Calix[4]arenes Bearing Sensitive Chiral Moieties for Chiral Discrimination of 1-Phenylethylamine Enantiomers
(SPRINGER, 2019) Özçelik, Egemen; Temel, Farabi; Erdemir, Serkan; Tabakcı, Begüm; Tabakcı, Mustafa
This article describes the enantiomeric discrimination properties of new chiral calix[4]arene derivatives bearing (S)-/(R)-1-phenylethylamine moieties (5a and 5b, respectively) towards the 1-phenylethylamine enantiomers on QCM surface. Initial experiments demonstrated that the 5b coated QCM sensor was the most effective sensing material for enantiomeric discrimination of (R)-/(S)-1-phenylethylamine by exhibiting much more sensing ability towards (R)-enantiomer than (S)-enantiomer. Sensitivity, detection limit and time constant of the 5b coated QCM sensor has been were calculated as 0.082 Hz/mu M, 2.7 mu M, and 319.2 s, respectively. Additionally, effects of calixarene content and different coating technique on enantiomeric discrimination, and Langmuir and Freundlich isotherms of the sensing results also were studied. As a result, it has been demonstrated that the coating of QCM sensor with a chiral calix[4]arene (5b) having (S)-1-phenylethylamine moieties provides substantially enantiomeric discrimination of 1-phenylethylamine enantiomers.
Citation - Scopus: 1
Qcm Sensors Coated With Calix[4]arenes Bearing Sensitive Chiral Moieties for Chiral Discrimination of 1-Phenylethylamine Enantiomers (vol 95, Pg 35, 2019) [correction]
(SPRINGER, 2019) Özçelik, Egemen; Temel, Farabi; Erdemir, Serkan; Tabakcı, Begüm; Tabakcı, Mustafa
[Abstract Not Available]
Citation - WoS: 22
Citation - Scopus: 24
Rapid and Real-Time Detection of Arginine Enantiomers by Qcm Sensor Having a Calix[4]arene Receptor Bearing Asymmetric Centers
(ELSEVIER, 2019) Temel, Farabi; Erdemir, Serkan; Özçelik, Egemen; Tabakcı, Begüm; Tabakcı, Mustafa
This paper describes the sensing studies of a chiral calix[4]arene receptor (5) having (R)-2-phenylglycinol moiety for arginine enantiomers (D-/L-arginine) by using Quartz Crystal Microbalance (QCM) technique. The initial experiments have revealed that the chiral calix[4]arene 5 coated QCM (CCC-QCM) sensor showed good sensing for arginine enantiomers, such that it has exhibited higher sensing towards D-arginine than that of L-arginine. It has been determined that the sensitivity, limit of detection values of CCC-QCM sensor for the D-/L-arginine solutions as 0.024/0.023 Hz/mu M and 0.38/1.29 mu M, respectively. On the other hand, the racemic mixture studies were optimized using the response surface methodology with central composite design. Consequently, it has been demonstrated that the QCM sensor modification with a calix[4]arene receptor bearing asymmetric centers provided rapid, real-time, sensitive and effective sensing of arginine enantiomers.
Removal of Some Phenolic Pollutions From Aqueous Solutions by Magnetic Nanoparticles Containing Imidazole-Derivatized Calix[4]arene
(Konya Technical University, 2021) Akceylan, Ezgi; Erdemir, Serkan; Özçelik, Egemen; Tabakci, Begüm
In this paper, it was aimed to synthesize imidazole-derived calix[4]arenes, immobilize these compounds to [3-(2,3-epoxypropoxy)-propyl]-trimetoxysilane (EPPTMS) modified Fe3O4 nanoparticles and to investigate adsorption properties of the obtained nanoparticles for some phenolic pollutants. For this purpose, firstly, a series of calix[4]arene derivatives (1, 2, 3, 4, 5, 6, 8) were synthesized according to the literature procedures and their structures were verified to synthesize the target compounds. Compound 6 among of these compounds was reacted with imidazole by the Mannich reaction to achieve target 7. On the other hand, calix[4]arene derivative bearing two distal bromo groups 8 was also reacted with imidazole to achive other target compound 9. The structure of both compounds was confirmed by 1H NMR spectroscopy. Thus, two different calix[4]arene derivatives were prepared from both the lower region and the upper region of the calix[4]arene with functional imidazole groups. These compounds were then immobilized to the EPPTMS modified Fe3O4 nanoparticle to obtain calix[4] arene-bonded new magnetic nanoparticles (C-7-BMN and C-9-BMN) bearing the imidazole group. These new nanoparticles were used as adsorbents in the adsorption of phenol (PHE), p-chlorophenol (pCF) and p-nitrophenol (pNP) from the aqueous solution. Concentrations of solution were determined by HPLC and adsorption results were calculated. The results revealed that C-9-BMN performed the highest adsorption for pCF at pH 6, while C-7-BMN showed no remarkable adsorption for any phenolic species. It has been understood that electrostatic interactions and hydrogen bond interactions are particularly important in the adsorption process and they are closely related to the structure of the adsorbent species depending on the ambient conditions. As a result, using the C-9-BMN adsorbent prepared in this study, the adsorption method, pCF, which is a toxic phenolic species, was removed from the aqueous solutions in a remarkable efficiency.
Citation - WoS: 29
Citation - Scopus: 28
Selective Chiral Recognition of Alanine Enantiomers by Chiral Calix[4]arene Coated Quartz Crystal Microbalance Sensors
(SPRINGER HEIDELBERG, 2019) Temel, Farabi; Erdemir, Serkan; Tabakcı, Begüm; Akpınar, Merve; Tabakcı, Mustafa
We describe the synthesis of new chiral calix[4]arene derivatives having (R)-1-phenylethylamine, (S)-1-phenylethylamine, (R)-2-phenylglycinol, and (S)-2-phenylglycinol moieties, and chiral recognition studies for enantiomers of some selected -amino acid derivatives such as alanine, phenylalanine, serine, and tryptophan using a quartz crystal microbalance (QCM). Initial experiments indicated that the highest selective chiral recognition factor was 1.42 for alanine enantiomers. The sensitivity, limit of detection, and time constant for l-alanine were calculated as 0.028 Hz/M, 60.9 M, and 36.2 s, respectively. The results indicated that real-time, sensitive, selective, and effective chiral recognition of alanine enantiomers was achieved with a QCM sensor coated with a chiral calix[4]arene derivative having (R)-2-phenylglycinol moieties.