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Syntheses and characterization of poly(iminophenol)s derived from 4-bromobenzaldehyde: Thermal, optical, electrochemical and fluorescent properties

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Abstract

Schiff base monomers [2-(4-bromobenzylideneamino)phenol and 2-(4-bromobenzylideneamino)-5-methylphenol] were synthesized by the condensation reaction of 4-bromobenzaldehyde with aromatic aminophenols. Then, the monomers were converted to their polyphenol derivatives by oxidative polycondensation reactions (OP) in an aqueous alkaline medium. The structures of the synthesized compounds were characterized by solubility tests, FT-IR, NMR, TG-DTA, DSC and SEC techniques. The HOMO-LUMO energy levels and electrochemical (E g ′) and optical (E g ) band gaps were calculated from cyclic voltammetry (CV) and UV-Vis measurements, respectively. Cyclic voltammetry (CV) was used to determine the electrochemical oxidation-reduction characteristics. Optical properties were investigated by UV-Vis and fluorescence analyses. Solid state electrical conductivities were measured on polymer films by four point probe technique using a Keithley 2400 electrometer. The effects of electron-donating (−CH3) group at p-position of -NH2 group in aminophenol on electrochemical and thermal properties were also discussed. Photoluminescence (PL) properties of the synthesized materials were determined in solution forms using different solvents. Fluorescence measurements were carried out in various concentrated solutions to determine the optimum concentrations to obtain the maximal PL intensities.

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Authors and Affiliations

  1. Faculty of Sciences and Arts, Department of Chemistry, Çanakkale Onsekiz Mart University, 17020, Çanakkale, Turkey

    İsmet Kaya & Özlem Gültekin

  2. Faculty of Sciences and Arts, Department of Chemistry, Celal Bayar University, 45040, Manisa, Turkey

    Ali Avcı

Authors
  1. İsmet Kaya
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  2. Ali Avcı
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  3. Özlem Gültekin
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Correspondence to İsmet Kaya.

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Kaya, İ., Avcı, A. & Gültekin, Ö. Syntheses and characterization of poly(iminophenol)s derived from 4-bromobenzaldehyde: Thermal, optical, electrochemical and fluorescent properties. Chin J Polym Sci 30, 796–807 (2012). https://doi.org/10.1007/s10118-012-1176-5

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  • DOI: https://doi.org/10.1007/s10118-012-1176-5

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