Research output: Contribution to journal › Article › peer-review
3D SWCNTs-coumarin hybrid material for ultra-sensitive determination of quercetin antioxidant capacity. / Şenocak, Ahmet; Köksoy, Baybars; Demirbaş, Erhan et al.
In: Sensors and Actuators, B: Chemical, Vol. 267, 15.08.2018, p. 165-173.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - 3D SWCNTs-coumarin hybrid material for ultra-sensitive determination of quercetin antioxidant capacity
AU - Şenocak, Ahmet
AU - Köksoy, Baybars
AU - Demirbaş, Erhan
AU - Basova, Tamara
AU - Durmuş, Mahmut
N1 - Publisher Copyright: © 2018 Elsevier B.V.
PY - 2018/8/15
Y1 - 2018/8/15
N2 - The novel 7-propinyloxy-3-(p-propinyloxyphenyl) coumarin having terminal ethynyl groups was synthesized for the first time. This coumarin has been successfully bounded covalently to single walled carbon nanotubes (SWCNTs) via the azide-alkyne Huisgen cycloaddition (Click) reaction for the preparation of a 3D hybrid material. Glassy carbon electrode was modified with the 3D SWCNTs-coumarin hybrid material for the determination of quercetin antioxidant. The proposed modified electrode is nearly 10-fold more sensitive than the bare electrode by applying the differential pulse stripping voltammetry (DPSV). In addition, the parameters of DPSV measurements such as accumulation time, accumulation potential and pH were optimized as 20 s, 200 mV and pH 2 Britton-Robinson buffer solutions in 1 μM quercetin, respectively. In the optimized conditions, the linear working range from 0.25 to 3 μM was determined. The detection and quantification limits of quercetin were found to be 20 nM and 66 nM by DPSV on the modified electrode, respectively. The DPSV procedure was also applied to test different brand tea real samples and quercetin was determined by a standard addition method with the recovery between 97.00 and 103.10.
AB - The novel 7-propinyloxy-3-(p-propinyloxyphenyl) coumarin having terminal ethynyl groups was synthesized for the first time. This coumarin has been successfully bounded covalently to single walled carbon nanotubes (SWCNTs) via the azide-alkyne Huisgen cycloaddition (Click) reaction for the preparation of a 3D hybrid material. Glassy carbon electrode was modified with the 3D SWCNTs-coumarin hybrid material for the determination of quercetin antioxidant. The proposed modified electrode is nearly 10-fold more sensitive than the bare electrode by applying the differential pulse stripping voltammetry (DPSV). In addition, the parameters of DPSV measurements such as accumulation time, accumulation potential and pH were optimized as 20 s, 200 mV and pH 2 Britton-Robinson buffer solutions in 1 μM quercetin, respectively. In the optimized conditions, the linear working range from 0.25 to 3 μM was determined. The detection and quantification limits of quercetin were found to be 20 nM and 66 nM by DPSV on the modified electrode, respectively. The DPSV procedure was also applied to test different brand tea real samples and quercetin was determined by a standard addition method with the recovery between 97.00 and 103.10.
KW - 3D hybrid material
KW - Click reaction
KW - Coumarin
KW - Quercetin antioxidant
KW - Single walled carbon nanotubes
KW - CARBON
KW - NONCOVALENT LINKING
KW - COVALENT
KW - ELECTRODES
KW - KAEMPFEROL
KW - NICOTINAMIDE ADENINE-DINUCLEOTIDE
KW - SENSOR RESPONSE
KW - NANOCOMPOSITE
KW - SELECTIVE DETECTION
KW - SOLID-PHASE EXTRACTION
UR - http://www.scopus.com/inward/record.url?scp=85045418960&partnerID=8YFLogxK
U2 - 10.1016/j.snb.2018.04.012
DO - 10.1016/j.snb.2018.04.012
M3 - Article
AN - SCOPUS:85045418960
VL - 267
SP - 165
EP - 173
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
SN - 0925-4005
ER -
ID: 12560686