Synthesis, physico-chemical characterization, and environmental applications of meso porous crosslinked poly (azomethine-sulfone)s

Abstract

To develop innovative mesoporous crosslinked poly(azomethine- sulfone)s with environmental applications, a simple Schiff base condensation technique based on barbituric acid BA or condensed terephthaldehyde barbituric acid TBA in their structures as monomeric units are applied. Different analysis methodologies and viscosity measurements identify them as having stronger heat stability and an amorphous structure. The photophysical features of the multi stimuli response MSR phenomenon are observable, with white light emission at higher concentrations and blue light emission at lower concentrations. Their emission characteristics make them an excellent metal ions sensor through diverse charge transfer methods. They can have a better inhibition efficiency and be employed as both mixed-type and active corrosion inhibitors according to their fluorescence emission with metals, demonstrating their capacity to bind with diverse metals. The adsorption of two distinct dye molecules, Methylene blue MB cationic and sunset yellow SY anionic, on the mesoporous structures of the polymers is investigated, revealing their selectivity for MB dye adsorption. Quantum studies support these amazing discoveries, demonstrating a crab-like monomeric unit structure for the one that is heavily crosslinked.

The enhanced photocatalytic performance of CPAA doping with different concentrations of Titanium oxide nanocomposite against MB dyes under simulated sunlight irradiations

“…Broad bands at 3425 cm −1 and 1630 cm −1 are assigned to the stretching vibration of (–OH) and Ti–OH deformative vibration, respectively, (the moisture on TiO 2 nanoparticles surface) 39 . The FT-IR spectra also reveal typical CPAA bond vibrations in the polymer's C=C and C=N bonds in the 1588–1596 cm –1 range and low-intensity peaks at 1413 cm –1 that correspond to =C–CH and –CH in- and out-of-plane deformation 36 . The C–N in-plane absorbance is 1043 cm −1 , whereas the out-of-plane deformations are 1290 and 1170 cm −1 , respectively.…”

“…1 a displays the observed absorption bands in the resulting polymer and their assignments. There is an alteration to lower wavelengths compared to the monomer and the absence of the aliphatic peak CH 3 group at 2889 cm −1 in the IR range of CPAA; the CH=N (imine) bond can be seen at 1609 cm −1 , and the carbonyl carbon is at 1658 cm −1 indicating the polymer formation 32 , 36 – 38 . In addition, the existence of repeated monomer units causes a reduction in the wave number and intensity of the conjugated bonds in the polymer, leading to a semi-broad combined peak in the CPAA spectrum.…”

Synthesis, characterization and protective efficiency of novel polybenzoxazine precursor as an anticorrosive coating for mild steel

“…The main strategies for preventing mild steel from unfavorable corrosion during industrial processes include organic coatings that resist corrosion. This keeping in contact with resistance inhibition and the creation of a barrier that prevents the passage of corrosive species and then were thought to be an affordable and practical solution 2 , 3 . The rates of ion transport and moisture through a coating's polymer network were frequently used to characterize a coating's protective barrier properties 3 .…”

Construction of novel polybenzoxazine coating precursor exhibiting excellent anti-corrosion performance through monomer design

“…The primary approach to prevent the mild steel from undergoing detrimental corrosion during industrial processes is through the use of organic coatings that offer resistance to corrosion. This strategy is both cost-effective and practical, as it involves creating a protective membrane that inhibits the passage of corrosive species, thereby preventing corrosion [ 15 , 16 ]. Recently, polybenzoxazine-based active oxides coatings have electrochemical reactions that have been applied to steel surfaces to prevent corrosion [ 17 , 18 ].…”