890704-00-4Relevant articles and documents
A novel functional conducting polymer: Synthesis and application to biomolecule immobilization
Kanik, Fulya Ekiz,Toppare, Levent,Rende, Eda,Timur, Suna
, p. 22517 - 22525,9 (2012)
A recently synthesized conducting polymer poly(TBT6-NH 2); poly(6-(4,7-di(thiophen-2-yl)-2H-benzo[d][1,2,3]triazol-2-yl) hexan-1-amine) was utilized as a matrix for biomolecule immobilization. After successful electrochemical deposition the polymer poly(TBT6-NH 2) on the graphite electrodes, immobilization of choline oxidase (ChO) was carried out. Due to the free amino functional groups of the polymeric structure, ChO molecules were successfully immobilized onto the polymer surface via covalent binding. For this, glutaraldehyde (GA) was used as crosslinker and bifunctional agent. Hence, a robust binding between the support and the protein molecules was achieved. Scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) were used to monitor the surface morphologies of both the polymer and the bioactive layer and to confirm the binding of the protein. Amperometric measurements were recorded by monitoring oxygen consumption in the presence of choline as the substrate at -0.7 V. The optimized biosensor showed a very good linearity between 0.1 and 10 mM with a 7 s response time and a detection limit (LOD) of 16.8 μM to choline. Also, kinetic parameters, operational and storage stabilities were determined. Finally, designed system was applied for pesticide detection.
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
, p. 454 - 463 (2014/08/18)
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]triazole (M1), 2-(6-(2,5-di(thiophen-2-yl)-1H-pyrrol-1-yl)hexyl)-4,7-di(thiophen-2-yl) -2H-benzo[d][1,2,3]triazole (M2) and 2-(6-(2,5-di(thiophen-2-yl)-1H-pyrrol-1-yl) hexyl)-4,7-bis(5-methylthiophen-2-yl)-2H-benzo[d][1,2,3]triazole (M3) were synthesized. To better characterize the electronic and spectroscopic properties of the monomers, density functional theory (DFT) and its time-dependent generalization (TD-DFT) were used to calculate their vertical ionization potentials, vertical electron affinity and to simulate and interpret their infrared and UV-vis spectra. The monomers were electrochemically polymerized and the resultant polymers were characterized with cyclic voltammetry and UV-vis-NIR spectroscopy techniques. An electrochromic device was constructed with electrochemical polymer of M2. The device switched between red and blue colors and showed exceptional optical memory.