Conducting polymers and composites of pyrrole and their uses as sensors

Selampınar, Fatma


Conducting polymers of terepthalic acid bis-(2-thiophen-3-yl-ethyl) ester and their electrochromic properties
Coskun, Y; Çırpan, Ali; Toppare, Levent Kamil (Elsevier BV, 2004-07-12)
Terepthalic acid bis-(2-thiophen-3-yl-ethyl)ester (TATE) was synthesized through the reaction of 2-thiophen-3-yl-ethanol and terepthaloyl chloride. Homopolymer of TATE was synthesized via potentiostatic and potentiodynamic methods by using tetrabutylammonium tetrafluoroborate (TBAFB) as the supporting electrolyte in dichloromethane/borontrifluoride ethylether solvent mixture(DM/BFEE) (8:2, v/v). Copolymerisation of TATE with thiophene was achieved in DM/BFEE solvent mixture (8:2, v/v) by using TBAFB as the ...
YURTSEVER, E; Toppare, Levent Kamil; HALLENSLEBEN, ML (1993-03-11)
The oligomerization mechanism of N-methacryloyl pyrrole was studied using semiempirical calculations. Starting with the monomer, a large number of dimer, trimer and tetramer structures were optimized. On comparison of alpha-alpha, alpha-beta and beta-beta type pyrrole-pyrrole linkages, it was found that beta-beta type bonding is the most stable form. On average, the introduction of one alpha-type linkage requires about 5 kcal mol-1 of energy.
Syntheses of new monomeric and polymeric units and electrochemical behaviors for the use in electrochromic applications
Zaifoğlu, Nazlı Buket; Toppare, Levent Kamil; Çırpan, Ali; Department of Chemistry (2013)
4'-(Tert-butyl)-4,7-di(thiophen-2-yl)spiro[benzo[d]imidazole-2,1'-cyclohexane], 4,7-di([2,2'-bithiophen]-5-yl)-4'-(tert-butyl)spiro[benzo[d]imidazole-2,1'-cyclohexane], 4'-(tert-butyl)-4,7-bis(thieno[3,2-b]thiophen-2-yl)spiro[benzo[d]imidazole-2,1'- cyclohexane] were synthesized, electrochemically polymerized and electrochromic properties of resultant polymers were investigated. The monomers were characterized by nuclear magnetic resonance spectroscopy (1H-NMR, 13C-NMR). Cyclic voltammetry (CV) and ultravio...
Bioactive surface design based on conducting polymers and applications to biosensors
Ekiz, Fulya; Toppare, Levent Kamil; Timur, Suna; Department of Biotechnology (2012)
An underlying idea of joining the recognition features of biological macromolecules to the sensitivity of electrochemical devices has brought the concept of biosensors as remarkable analytical tools for monitoring desired analytes in different technological areas. Over other methods, biosensors have some advantages including high selectivity, sensitivity, simplicity and this leads to solutions for some problems met in the measurement of some analytes. In this context, conducting polymers are excellent alter...
Electrochemical synthesis of crowned conducting polymers : nature of radical cations in polymerization and mechanism of conductivity
Cihaner, Atilla; Önal, Ahmet Muhtar; Department of Chemistry (2004)
Poly(dibenzo-18-crown-6) (Poly(DB18C6)) was synthesized by electrochemical oxidation of dibenzo-18-crown-6 (DB18C6) using a mixture of acetonitrile and dichloromethane as solvent and tetrabutylammonium tetrafluoroborate (TBABF4) or tetrabutylammonium hexafluorophosphate (TBAPF6) as supporting electrolyte. The anodic polymerization of DB18C6 was investigated using in-situ ESR and in-situ UV-VIS spectroscopic techniques. Spectroelectrochemical (SPEL) properties and thermal analysis of the resulting polymers h...
Citation Formats
F. Selampınar, “Conducting polymers and composites of pyrrole and their uses as sensors,” Ph.D. - Doctoral Program, Middle East Technical University, 1997.