Abstract
An optically active polyaniline nanomaterial (PANI-Nap), doped with (S)-naproxen, was developed and evaluated as a potent pH sensor. We synthesized the material in one pot by the addition of the dopant, (S)-naproxen, prior to polymerization, followed by the addition of the oxidizing agent (ammonium persulfate) that causes polymerization of the aniline. This green chemistry approach allowed us to take only 1 h to produce a water-soluble and stable nanomaterial. UV-visible spectroscopy, fluorescence spectroscopy, FT-IR spectroscopy, Raman spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) were used to characterize the designed nanomaterial. This nanomaterial exhibited excellent pH sensing properties and showed long term stability (up to one month) without loss of sensor performance.
Highlights
In the past few decades, there has been increased interest in synthesizing chiral-conducting polymers because of their potential applications as surface-modified electrodes [1] and separation materials [2]
We studied the morphology of PANI-Nap using scanning electron microscopy (SEM) and transmission electron microscopy (TEM), and we aimed to synthesize highly processable optically-active, nanomaterial, PANI-Nap
The material was redissolved in deionized water to perform the sensing application
Summary
In the past few decades, there has been increased interest in synthesizing chiral-conducting polymers because of their potential applications as surface-modified electrodes [1] and separation materials [2]. Active, conducting polymers are of considerable interest [7], because of their wide application in stereoselective analysis [1,8,9], chiral separations [10], and as chemical and biological sensors [11,12]. Occurring amino acids can act as a dopant, where the -COOH group provides doping to conducting polymers by hydrogen bonding, which in turn stabilizes the chiroptical properties of optically active PANI [25]. Discrete morphologies (i.e., flakes, flower, and fibers forms) of PANI have been prepared using naturally occurring chiral amino acids as a soft template [28,29] through the electrostatic interaction and hydrogen bonding between PANI and amino acids.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
