Electrochemical properties of polythiophene depending on preparation conditions

Kabasakaloğlu, M.; Kiyak, Tülin; Toprak, Hüseyin; Aksu, Mehmet Levent

doi:10.1016/s0169-4332(99)00307-4

Cited by 21 publications

(14 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…15,16,20 The electrochemical properties of polythiophene films largely depend on the supporting electrolyte, especially on the type of anion. [22][23][24][25] According to Wu and Pawliszyn, 26 the use of different electrolytes enables manipulation of the functionality of the resulting polymers. Therefore, two electrolyte solutions (namely TBATFB and NaClO 4 ) in acetonitrile were evaluated for the electrodeposition of polythiophene in order to increase the selectivity and efficiency of the extraction phase.…”

Section: Electropolymerization Processmentioning

confidence: 99%

Evaluation of solid-phase microextraction using a polythiophene film and liquid chromatography with spectrophotometric detection for the determination of antidepressants in plasma samples

Caris¹,

Chaves²,

Queiroz³

2012

J. Braz. Chem. Soc.

View full text Add to dashboard Cite

A fase extratora de politiofeno (PTh), desenvolvida por eletropolimerização em haste de aço inox, foi avaliada para microextração em fase sólida (SPME) e análise por cromatografia líquida com detecção espectrofotométrica (LC-UV) de antidepressivos inibidores seletivos da recaptação de serotonina (citalopram, paroxetina, fluoxetina e sertralina) em amostras de plasma. A influência das variáveis da eletropolimerização (velocidade de varredura de potencial, potencial e ciclos de varredura) foi avaliada no desempenho SPME. As variáveis SPME (tempo de extração, temperatura, pH da matriz, força iônica e procedimento de dessorção), assim como a influência das proteínas do plasma no mecanismo de sorção, foram também avaliadas. O método SPME-PTh/LC-UV desenvolvido para a determinação de antidepressivos em amostras de plasma apresentou faixa linear de resposta do limite de quantificação (LOQ, 200-250 ng mL -1 ) a 4000 ng mL -1 e precisão interensaio com coeficiente de variação no intervalo de 11 a 15%. O método proposto poderá ser utilizado para a determinação de antidepressivos em amostras de plasma humano para análises toxicológicas de urgência, após a ingestão acidental ou suicida de doses altas de medicamentos.Polythiophene (PTh) phase electropolymerized on the stainless steel wire was evaluated as solidphase microextraction (SPME), and analysis by liquid chromatography with spectrophotometric detection (LC-UV) for determination of new-generation antidepressants, selective serotonin reuptake inhibitors (SSRIs) (citalopram, paroxetine, fluoxetine and sertraline), in plasma samples. The influence of electropolymerization variables (scan rate, potential range and scan cycles) was evaluated on SPME performance. The SPME variables (extraction time, temperature, matrix pH, ionic strength and desorption procedure), as well as the influence of plasma proteins on sorption mechanisms were also evaluated. The SPME/LC-UV method developed for determination of antidepressants in plasma sample presented a linear range between the limit of quantification (LOQ, 200-250 ng mL -1 ) to 4000 ng mL -1 , and interday precision with coefficient of variation (CV) ranged from 11 to 15%. The proposed method can be a useful tool for the determination of antidepressants in human plasma samples in urgent toxicological analysis after the accidental or suicidal intake of higher doses of medications.

show abstract

Section: Electropolymerization Processmentioning

confidence: 99%

Evaluation of solid-phase microextraction using a polythiophene film and liquid chromatography with spectrophotometric detection for the determination of antidepressants in plasma samples

Caris¹,

Chaves²,

Queiroz³

2012

J. Braz. Chem. Soc.

View full text Add to dashboard Cite

show abstract

“…3,5,79 Diferentes modificações químicas têm sido realizadas, nos últimos anos, com o intuito de melhorar as propriedades destes polímeros conjugados para satisfazer as diversas características necessárias para aplicações em dispositivos eletrônicos orgânicos. 80 Kabasakaloglu e colaboradores, 81 em seus estudos das propriedades eletroquímicas de politiofenos, observaram que filmes obtidos eletroquimicamente apresentavam propriedades eletroquímicas e valores de condutância diferentes, dependendo do tipo e concentração do eletrólito suporte em-…”

Section: Derivados De Tiofenos Como Polímeros Conjugados E Algumas Deunclassified

Oligômeros e polímeros derivados do tiofeno: síntese e aplicações

Alves¹,

Calado²,

Matencio³

et al. 2010

Quím. Nova

View full text Add to dashboard Cite

#Thanks a lot, Prof. Hans Viertler, for everything you taught me: a plenty of good chemistry, specially organic chemistry and electrochemistry… Thanks for the good examples to be followed and the mistakes and bad things to be avoided… and finally citing Carl Gustav Jung as followed, thank you for helping me to transform myself in the chemist I am now… " Recebido em 24/3/10; aceito em 27/8/10; publicado na web em 25/10/10 THIOPHENE-BASED OLIGOMERS AND POLYMERS: SYNTHESES AND APPLICATIONS. In this review we summarize recent synthetic investigations about the preparation of oligothiophenes and polythiophenes, the most important π-conjugated organic materials for applications in electrochromic and electroluminescent devices. It is showed that many interesting and novel functionalized oligothiophenes have been synthesized by convenient coupling strategies (Heck, Kumada, Negishi, Suzuki, Stille and Ullmann) and oxidative coupling methods. Synthesis of polythiophenes are also presented and described according to chemical and electrochemical polymerization methodologies. The description of these noteworthy synthetic methods illustrates how important and promising are the interdisciplinary approaches in the obtaining of oligothiophenes and polythiophenes.Keywords: oligomeric and polymeric thiophenes; syntheses; conjugated polymers. INTRODUÇÃOOs polímeros conjugados (PCs) são conhecidos como "metais sintéticos" devido a suas propriedades elétricas, magnéticas, eletrô-nicas e ópticas semelhantes aos dos metais; as propriedades de um polímero convencional (flexibilidade, processabilidade e formação de filmes finos, boa estabilidade térmica, etc.) e as propriedades de um semicondutor combinadas em um único material resultam em polímeros para aplicação no campo da eletrônica orgânica. A incontestável importância científica atual desta classe de materiais pode ser percebida pela concessão do Prêmio Nobel de Química de 2000 para Heeger, McDiarmid e Shirakawa por suas pesquisas com PCs. 1 É digno de nota que, quando estes materiais são estimulados eletricamente, podem ter sua cor variada de forma reversível ou mesmo emitir luz visível, o que possibilita a sua aplicação em diversos dispositivos eletrocrômicos 2 ou diodos emissores de luz orgânicos (OLEDs -Organic Light Emission Diodes). Dentre outras possibilidades de aplicação, pode-se citar o desenvolvimento de condutores elétricos, células fotovoltaicas poliméricas, transistores orgânicos, 3,4 anticorrosivos, 5,6 materiais eletrocrômicos, 7 baterias recarregáveis, 8 etc.Em meio aos diversos PCs pesquisados para o desenvolvimento dos dispositivos eletrônicos orgânicos, tais como politiofenos (1), polipirróis (2), polianilinas (3), 9,10 polifenilenovinilenos (4) 11 (Figura 1), destacam-se os politiofenos e seus derivados, que são os materiais mais estudados nesta área. 2 A possibilidade de aplicação dos politiofenos em dispositivos eletrocrômicos é conhecida desde 1983 12-15 e, em 1986, com a primeira síntese descrita de polialquiltiofenos com processabilidade e projeção a nível...

show abstract

“…[1][2][3] Polythiophene (PT) has been widely investigated as a potential conducting material in the field of molecular electronics. [4][5][6][7] Polythiophene is of great interest because of its redox and photochemical properties and its proposed use in textile products, [7] electrochemical materials, [9,10] and plastic electronics. [11] There is growing interest in thiophene, pyrrole, and aniline for the development of electrical and optical properties of organic and polymeric materials.…”

Section: Introductionmentioning

confidence: 99%

“…These chemicals, which have an extended π -conjugated structure, offer many advantages in terms of processability, and they show exceptional electrical conductivity properties. [2,5,9,[11][12][13][14][15] A significant portion of recent literature on plasma modification/deposition of substrates has focused on better controllability of film chemistry during depositions, with the goal of producing surface-active coatings. [16][17][18] Exant literature has explained clearly that pulsed plasma interactions on substrate surfaces, in general, result in higher retention of the monomer structure compared to continuous wave (CW) plasma polymerization.…”

Section: Introductionmentioning

confidence: 99%

Thiophene Deposition on Paper Surface by Pulsed RF-Plasma

Şahin

2015

Journal of Wood Chemistry and Technology

View full text Add to dashboard Cite

Journal of Wood Chemistry and TechnologyPublication details, including instructions for authors and subscription information:The plasma duty cycle, in addition to power and exposure time, affects the surface atomic composition of thiophene plasma-treated paper. The elemental carbon and sulfur concentration increased from 56.7% to 78.6% and 0% to 13.4%, respectively, while oxygen decreased from 43.3% to 8.0% with the plasma treatment. Relatively large variations in the deposited film-like layer composition could be realized by changing plasma external parameters. The high-resolution (HR) C1s spectra of the thiophene plasma-treated paper clearly exhibit plasmainduced rearrangements and new sulfur functionalities on the paper surface. After a five-hour ex situ doping of thiophene plasma-treated papers with iodine, conductivity ranging from δ = 4.2E-2 to 4.1 S/cm was obtained. The low relative F/C atomic ratio after TFAA derivatization indicates that no hydroxyl groups were present on the paper surface after the thiophene plasma treatment.

show abstract

Electrochemical properties of polythiophene depending on preparation conditions

Cited by 21 publications

References 17 publications

Evaluation of solid-phase microextraction using a polythiophene film and liquid chromatography with spectrophotometric detection for the determination of antidepressants in plasma samples

Evaluation of solid-phase microextraction using a polythiophene film and liquid chromatography with spectrophotometric detection for the determination of antidepressants in plasma samples

Oligômeros e polímeros derivados do tiofeno: síntese e aplicações

Thiophene Deposition on Paper Surface by Pulsed RF-Plasma

Contact Info

Product

Resources

About