Electrochemical polymerization of 1-(4-nitrophenyl)-2,5-di(2-thienyl)-1 H-pyrrole as a novel immobilization platform for microbial sensing

Tuncagil, Sevinc
Varis, Serhat
Toppare, Levent Kamil
Two types of bacterial biosensor were constructed by immobilization of Gluconobacter oxydans and Pseudomonas fluorescens cells on graphite electrodes modified with the conducting polymer; poly(1-(4-nitrophenyl)-2,5-di(2-thienyl)-1 H-pyrrole) [SNS(NO2)]. The measurement was based on the respiratory activity of cells estimated by the oxygen consumption at -0.7 V due to the metabolic activity in the presence of substrate. As well as analytical characterization, the linear detection ranges, effects of electropolymerization time, pH and cell amount were examined by using glucose as the substrate. The linear relationships were observed in the range of 0.25-4.0 mM and 0.2-1.0 mM for G. oxydans and P. fluorescens based sensors, respectively.


Design of Carbon Nanotube Modified Conducting Polymer for Biosensing Applications
Ozdemir, Caglar; Tuncagil, Sevinc; ODACI DEMİRKOL, DİLEK; TİMUR, SUNA; Toppare, Levent Kamil (2011-01-01)
An electrochemical biosensor with improved performance was designed through the immobilization of glucose oxidase (GOx) onto conducting polymer of 4-(2,5-di(thiophen-2-yl)-1H-pyrrol-1-yl)benzenamine (SNS-NH2) modified with carbon nanotubes (CNTs). For the optimization and characterization of the biosensor, pH profile, enzyme loading, reproducibility, operational stability experiments were carried out. It was found that the use of CNTs in a biosensing system enhanced the biosensor response. The linear relati...
Electrochemical and spectroelectrochemical studies of poly(2,5-di-2,3-dihydrothieno[3,4-b][1,4]dioxin-5-ylthienyl) derivatives bearing azobenzene, coumarine and fluorescein dyes: Effect of chromophore groups on electrochromic properties
Yigit, Deniz; Udum, Yasemin Arslan; GÜLLÜ, Mustafa; Toppare, Levent Kamil (2014-11-20)
Three novel thiophene based monomers, 2,5-di-2,3-dihydrothieno[3,4-b][1,4]dioxin-5-ylthienyl derivatives, 1-{4-[(2,5-Di-2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl-3-thienyl) methoxy] phenyl}-2-phenyldiazene) (ETEAz), 4-[(2,5-Di-2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl-3-thienyl) methoxy]2H- chromen-2-one) (ETECo) and methyl 2-{6-[(2,5-Di-2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl-3-thienyl) methoxy]-3-oxo-3H-xanthen -9-yl} benzoate (ETEFlo), were synthesized and their conducting polymers were electrochemically ...
Electrochemical and optical properties of a conducting polymer and its use in a novel biosensor for the detection of cholesterol
SÖYLEMEZ, SANİYE; UDUM, YASEMİN; Kesik, Melis; HIZLIATEŞ, CEVHER GÜNDOĞDU; ERGÜN, Mustafa Yavuz; Toppare, Levent Kamil (2015-06-01)
A simple and robust cholesterol biosensor was designed by immobilizing cholesterol oxidase (ChOx) onto a conducting polymer modified graphite electrode. For this purpose, monomer, (Z)-4-(4-(9H-carbazol-9-yl) benzylidene) 2 (4 nitrophenyl) oxazol-5(4H)-one (CBNP), was synthesized and electrochemically polymerized on an electrode to achieve an effective immobilization platform for enzyme immobilization. After electropolymerization of the monomer (CBNP), electrochemical and spectroelectrochemical properties we...
Electrochromic properties of multicolored novel polymer synthesized via combination of benzotriazole and N-functionalized 2,5-di(2-thienyl)-1H-pyrrole units
Rende, Eda; Kilic, Cihan E.; Udum, Yasemin Arslan; Toffoli, Daniele; Toppare, Levent Kamil (2014-08-20)
Synthesis of new conducting polymers is desired since their electrochemical and optical properties enable them to be used as active layers in many device applications. Benzotriazole and N-functionalized 2,5-di(2-thienyl)-1H-pyrrole (SNS Series) containing polymers showed very promising results as electrochromic materials. In order to observe the effect of the combination of these two units, three new monomers; 2-(6-(2,5-bis(5-methylthiophen-2-yl)-1H-pyrrol-1-yl)hexyl)-4,7-di(thiophen-2-yl)-2H benzo[d][1,2,3...
Electrochemical sensing of glucose using conjugated polymer/chitosan/mwcnt architecture
Özel, Hande; Toppare, Levent Kamil; Söylemez, Saniye; Department of Polymer Science and Technology (2018)
In this thesis an amperometric biosensor consisting of a conjugated polymer, chitosan and multi-walled carbon nanotubes constructed for the detection of glucose. Conjugated polymers have opened a new era for the development of biosensing platforms with their unique electronic properties, high stabilities and processabilities. They serve both as immobilization matrices for biorecognition elements and as transducers in biosensing devices. As an additional modification material, chitosan was participated in th...
Citation Formats
S. Tuncagil, D. ODACI DEMİRKOL, S. Varis, S. TİMUR, and L. K. Toppare, “Electrochemical polymerization of 1-(4-nitrophenyl)-2,5-di(2-thienyl)-1 H-pyrrole as a novel immobilization platform for microbial sensing,” BIOELECTROCHEMISTRY, pp. 169–174, 2009, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/35434.