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Conductive and photoactive nature of conjugated polymer based on thiophene functionalized thiazole or benzothiadiazole.

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Title: Conductive and photoactive nature of conjugated polymer based on thiophene functionalized thiazole or benzothiadiazole.
Authors: Mahesh, K.1, Karpagam, S.1 skarpagam80@yahoo.com, Goubard, F.2
Source: Express Polymer Letters. 2018, Vol. 12 Issue 3, p238-255. 18p. 1 Color Photograph, 1 Black and White Photograph, 1 Diagram, 4 Charts, 13 Graphs.
Subjects: Conducting polymers testing, Thiophenes, Chemical synthesis, Thiazoles, Photoluminescence measurement, Cyclic voltammetry
Abstract: New poly (thiophene vinyl thiazole) (PTVT) and poly (thiophene vinyl benzothiadiazole) (PTVBT) was synthesized by Wittig condensation route. The absorption maximum of PTVT and PTVBT appeared at 376 and 410 nm in a solution state, and it was red-shifted to 417 and 510 nm in a thin film state. The optical band gaps were 1.7 and 1.5 eV calculated from thin film absorption edges of the polymer. The photoluminescence spectra of PTVT and PTVBT have an emission peak at 457 nm with bluish green and 487 nm with greenish-yellow fluorescence in THF solution. Both polymers showed a short fluorescence decay time (t1) of 2.31 and 0.73 ns respectively. Furthermore, the aggregation-caused quenching (ACQ) phenomenon observed in both polymers in decreased fluorescence intensity with different water fractions. The lower electrochemical band gaps were achieved for both polymers (1.4, and 1.3 eV) from cyclic voltammetry. Both polymers have a granular shaped morphology with good surface roughness was observed using AFM. High thermal stability was observed with 8% weight loss at 400 °C for PTVT and 6% weight loss at 460°C for PTVBT. The highest electrical conductivity was observed from electrochemical impedance measurement which was 7.68·10-6 Ω-1·cm-1 for PTVBT. [ABSTRACT FROM AUTHOR]
Copyright of Express Polymer Letters is the property of Budapest University of Technology & Economics and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Conductive and photoactive nature of conjugated polymer based on thiophene functionalized thiazole or benzothiadiazole.
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  Data: <searchLink fieldCode="AR" term="%22Mahesh%2C+K%2E%22">Mahesh, K.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Karpagam%2C+S%2E%22">Karpagam, S.</searchLink><relatesTo>1</relatesTo><i> skarpagam80@yahoo.com</i><br /><searchLink fieldCode="AR" term="%22Goubard%2C+F%2E%22">Goubard, F.</searchLink><relatesTo>2</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Express+Polymer+Letters%22">Express Polymer Letters</searchLink>. 2018, Vol. 12 Issue 3, p238-255. 18p. 1 Color Photograph, 1 Black and White Photograph, 1 Diagram, 4 Charts, 13 Graphs.
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  Data: <searchLink fieldCode="DE" term="%22Conducting+polymers+testing%22">Conducting polymers testing</searchLink><br /><searchLink fieldCode="DE" term="%22Thiophenes%22">Thiophenes</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical+synthesis%22">Chemical synthesis</searchLink><br /><searchLink fieldCode="DE" term="%22Thiazoles%22">Thiazoles</searchLink><br /><searchLink fieldCode="DE" term="%22Photoluminescence+measurement%22">Photoluminescence measurement</searchLink><br /><searchLink fieldCode="DE" term="%22Cyclic+voltammetry%22">Cyclic voltammetry</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: New poly (thiophene vinyl thiazole) (PTVT) and poly (thiophene vinyl benzothiadiazole) (PTVBT) was synthesized by Wittig condensation route. The absorption maximum of PTVT and PTVBT appeared at 376 and 410 nm in a solution state, and it was red-shifted to 417 and 510 nm in a thin film state. The optical band gaps were 1.7 and 1.5 eV calculated from thin film absorption edges of the polymer. The photoluminescence spectra of PTVT and PTVBT have an emission peak at 457 nm with bluish green and 487 nm with greenish-yellow fluorescence in THF solution. Both polymers showed a short fluorescence decay time (t1) of 2.31 and 0.73 ns respectively. Furthermore, the aggregation-caused quenching (ACQ) phenomenon observed in both polymers in decreased fluorescence intensity with different water fractions. The lower electrochemical band gaps were achieved for both polymers (1.4, and 1.3 eV) from cyclic voltammetry. Both polymers have a granular shaped morphology with good surface roughness was observed using AFM. High thermal stability was observed with 8% weight loss at 400 °C for PTVT and 6% weight loss at 460°C for PTVBT. The highest electrical conductivity was observed from electrochemical impedance measurement which was 7.68·10-6 Ω-1·cm-1 for PTVBT. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Express Polymer Letters is the property of Budapest University of Technology & Economics and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.3144/expresspolymlett.2018.22
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        Text: English
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      – SubjectFull: Conducting polymers testing
        Type: general
      – SubjectFull: Thiophenes
        Type: general
      – SubjectFull: Chemical synthesis
        Type: general
      – SubjectFull: Thiazoles
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      – SubjectFull: Photoluminescence measurement
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      – SubjectFull: Cyclic voltammetry
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      – TitleFull: Conductive and photoactive nature of conjugated polymer based on thiophene functionalized thiazole or benzothiadiazole.
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              Text: 2018
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