Surface selectivity competition of newly synthesized polyarylidene(keto amine) polymers toward different metal ions

Abstract

A new series of polyarylidene(keto amine)s (PAKAs) 3 a 23 e based on thiophene moieties in polymer main chains were synthesized with the solution polycondensation technique. The polymers were synthesized by the reaction of the new monomer 1,1 0 -(1E,1 0 E)-(2-oxocyclohexane-1,3-diylidene)bis(methanylylidene)bis(thiophene-5,2-diyl)bis(2-chloroethanone) (2) with different diamines. The new monomer was first synthesized under the normal conditions of the Friedel-Crafts reaction. The results obtained from both elemental and spectral analyses were consistent with the chemical structure of the new monomers and the polymers. Moreover, the identification of the polymers was carried out with different characterization techniques. The analytical competition of the newly synthesized PAKA polymers as selected examples (3 d and 3 e ) was also evaluated for a selective extraction of metal ions, including Cd(II), Co(II), Cu(II), Cr(III), Fe(III), Ni(II), and Zn(II), before their determination by inductively coupled plasma-optical emission spectrometry. The results of the selectivity study demonstrated that the 3 d and 3 e polymers was the most selective toward Co(II) and Fe(III), respectively. However, the adsorption capacity of 3 d for Co(II) was improved by 10.10% in comparison to that of 3 e for Fe(III) after only 1 h of contact time. Moreover, the adsorption isotherm data also showed that the adsorption process was mainly monolayer on the homogeneous adsorbent surfaces of both polymers.

Thermally stable hybrid polyarylidene(azomethine-ether)s polymers (PAAP): an ultrasensitive arsenic(III) sensor approach

“…TG thermographs of the synthesized polymers and copolymers are illustrated in (figures S8, S9 and S10) and Table 2 shows the temperatures for 10, 25 and 50% of weight losses. In most cases T 10 (temperatures for 10% weight loss) are found to be the polymers degradation temperatures (PDT); which means that no significant decomposition are examined before such temperatures [24]. For the polyarylidene(azomethine–ether)s 7 a,c the curves show a little weight loss within the range 2–5% (onset at 90°C to 140°C), which is due to loss of imbibed humidity and entrapped solvents.…”

“…These kind of polymers almost have enjoyable properties which can be applied in a variety of industrial fields. Adequate number of arylidene polymers are found in the literature holding conducting ability, liquid crystal properties, inhibitive corrosion protection, thermal stabilities, attractive morphology, biological screening in some cases and other properties [24–32]. …”

Erratum to “Novel Facial Conducting Polyamide-Based Dithiophenylidene Cyclyhexanone Moiety Utilized for Selective Cu2+ Sensing”

“…The title premonomer was prepared as reported in the literature [52] and as reported in our previous studies [53,54] as follows. In a 250-mL conical flask, 3 mL of freshly prepared alcoholic solution of potassium hydroxide was added in a dropwise manner to a mixture of cyclohexanone (1.037 mL, 10 mmol) and …”

“…This compound also was prepared as illustrated in our previous work [54] as follows. The title compound 2 was prepared as follows.…”

“…The new polymers are necessitating the synthesizing of new monomer and premonomer as well. The first premonomer, namely, 2,6-bis(thiophen-2-ylmethylene) cyclohexanone 1 is synthesized in considerable yield as reported in the literature [52][53][54] by the condensation of 10 mmol of cyclohexanone with 22 mmol of 2-thiophencarbaldehyde in absolute ethanol and in the presence of few drops of potassium hydroxide solution as a basic catalyst. This premonomer is easily converted to the second premonomer, namely, 2,5-bis[4-choloroacetyl(thiophen-2-ylmethylene)]cyclohexanone 2 according to the well-known Friedel-Crafts condensation procedure.…”