Abstract
Highly fluorescent binary and ternary hybrid materials based on polyaniline, polyethylene glycol (PEG) and arsenic sulphide have been prepared via oxidative chemical polymerization and characterized by FT-IR and powder X-ray diffraction techniques. Thermogravimetric analysis showed that all the materials are thermally stable up to 250℃. The optical behaviour was investigated using UV-Vis. and fluorescence spectroscopy. Fluorescence spectra of polyaniline and its hybrids were found to be concentration dependent, and concentrations were optimized to achieve maximum intensity of emission. Aggregation caused quenching (ACQ) may be the possible reason for concentration dependent emission. Hybrids showed significantly enhanced fluorescence than polyaniline. The AC electrical conductivity was also measured and found to be better for hybrids than the polyaniline. In the PAni-PEG-As2S3 hybrid, the conductivity was found to be 9.57 × 10-1 S/cm at 100 KHz. This valuable improvement in luminescent property and conducting behaviour may be useful in various optoelectronic and electronic applications.
Highlights
Conjugated conducting polymers have recently received special attention in nanoscience and nanotechnologyThe structural photoelectrical properties of PAni/Bi2S3 composite thin film prepared by electrodeposition have been studied
To the best of our knowledge no reports have been found related to synthesis and optical properties of ternary hybrid of PAni with As2S3-polyethylene glycol (PEG)
Synthesis of Polyaniline-Polyethylene Glycol (PAni-PEG) Hybrid To the solution of aniline (3 g, 0.03 mol) dissolved in 60 mL 2N HCl, 1.0 g polyethylene glycol dissolved in 25 mL water solution was added, mixed thoroughly and cooled below 5 ̊C in an ice bath
Summary
The structural photoelectrical properties of PAni/Bi2S3 composite thin film prepared by electrodeposition have been studied. It was found that with the increase in concentration of PAni in PAni/Bi2S3 hybrid, conductivity increases [23]. The photoluminescence and Raman evidence for mechanic-chemical interaction of polyaniline-emeraldine base with ZnS in cubic and hexagonal phase have been reported [25]. Binary/ternary hybrids of polyaniline with PEG and As2S3 were synthesized by in situ polymerization of aniline in acidic medium. All the materials were characterized for their spectral, thermal, optical and electrical properties. Luminescence behaviour of polyaniline and its hybrids were investigated at different concentration in dimethylsulphoxide (DMSO). To the best of our knowledge no reports have been found related to synthesis and optical properties of ternary hybrid of PAni with As2S3-PEG
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