| dc.description.abstract | Polyaniline and their derivative are highly demanded conjugated polymers in
opto-electronic, biomedical, and physico-chemico-mechanical fields due to their
peculiar properties. In this work, poly-N-phenyl aniline derivatives were synthesized
and their optical properties and some of their applications were studied. Fluorescent
and colorimetric sensors based on poly-N-phenyl aniline derivatives working in water
media were also developed.
The main objectives of our work are as follows: - (1) synthesis,
characterization, and applications of poly-N-phenyl anthranilic acid, (2) synthesis,
characterization,
and
applications
of
poly-N-phenyl-o-phenylenediamine,
(3)
synthesis, characterization, and applications of poly-o-phenylenediamine, and (4)
synthesis, characterization, and applications of copolymers of N-phenyl anthranilic
acid and o-phenylenediamine. Synthesis of poly-N-phenyl anthranilic acid, poly-N-
phenyl-o-phenylenediamine, and poly-o-phenylenediamine was carried out with
chemical oxidative polymerizations using FeCl 3 as oxidizing agent in ethanol
medium. Copolymers of N-phenyl anthranilic acid and o-phenylenediamine was also
synthesized by chemical oxidative polymerization using FeCl 3 as oxidizing agent in
ethanol medium and their properties were compared with physical blends of
homopolymers. General characterizations of polymers with proton nuclear magnetic
resonance spectroscopy, Fourier transform infrared spectroscopy, powder x-ray
diffractometry, and MALDI-TOF analysis were carried out. Thermal stability studies
were done using thermogravimetry. Morphological studies of homopolymers,
copolymer, and physical blend were carried out using field emission scanning electron
microscopy. Fluorescence properties of poly-N-phenyl anthranilic acid and poly-o-
phenylenediamine were studied and the relationship between electrochemical redox
states in polymer and fluorescence behavior were established. Fluorescent sensors for
oxidizing analytes were developed using poly-N-phenyl anthranilic acid, poly-o-
phenylenediamine, and their copolymer. A colorimetric acid content sensor useful for
state of charge determination in lead-acid batteries was developed based on poly-N-
phenyl-o-phenylenediamine. The fluorescent turn-off in poly-N-phenyl anthranilic
acid and N-phenyl anthranilic acid with oxidizing agents were utilized for the
quantitative estimations using microscale redox titrations with fluorometricindication. The studies on invisible dye like characteristics and cell imaging promised
poly-N-phenyl anthranilic acid as an efficient material in anti-counterfeiting and
biological fields. | en_US |
