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Synthesis and characterization of new conducting polymer- nanoparticle composites
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Date
2013
Author
Eroğlu, Esra
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In this study, conjugated monomers containing fluorene units; 2-(9,9-dihexyl-2-(thiophen-2-yl)-9H-fluoren-7-yl)thiophene (TFT) and 5-(9,9-dihexyl-2-(2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl)-9H-fluoren-7-yl)-2,3dihydrothieno[3,4b ][1,4] dioxine (EFE) were synthesized on the basis of donor-acceptor-donor approach and their electrochemical polymerization were achieved via potential cycling. Optical and electrochemical properties of their corresponding polymers, poly(2-(9,9-dihexyl-2-(thiophen-2-yl)-9H-fluoren-7-yl)thiophene) PTFT, and poly(5-(9,9-dihexyl-2-(2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl)-9H-fluoren-7-yl)-2,3dihydrothieno[3,4b ][1,4] dioxine) PEFE, were investigated and it was found that polymer films exhibited quasi-reversible redox behavior (Epox= 1.10 V for PTFT, Epox = 0.70 V and 1.00 V for PEFE) accompanied with a reversible electrochromic behavior, yellow to dark green for PTFT, yellow to parliament blue for PEFE. Their band gap values (Eg) were found to be 2.36 eV and 2.26 eV for PTFT and PEFE, respectively. Furthermore, gold nanoparticles (AuNP) were prepared and their interaction with polymer films, PTFT and PEFE, were investigated using spectroscopic techniques. The fluorescence properties of the polymers and their composites, prepared by the interaction of AuNP with polymers, were also investigated.
Subject Keywords
Conjugated polymers.
,
Fluorene.
,
Heterocyclic compounds.
,
Gold.
,
Nanoparticles.
URI
http://etd.lib.metu.edu.tr/upload/12615631/index.pdf
https://hdl.handle.net/11511/22432
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Graduate School of Natural and Applied Sciences, Thesis
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E. Eroğlu, “Synthesis and characterization of new conducting polymer- nanoparticle composites,” M.S. - Master of Science, Middle East Technical University, 2013.
