Synthesis of Metalorganic Copolymers Containing Various Contorted Units and Iron(II) Clathrochelates with Lateral Butyl Chains: Conspicuous Adsorbents of Lithium Ions and Methylene Blue

Abstract

We report the synthesis of three highly soluble metalorganic copolymers, TCP1–3, that were made from a one-pot complexation of iron(II) clathrochelate units that are interconnected by various thioether-containing contorted groups. TCP1–3 were converted into their poly(vinyl sulfone) derivatives OTCP1–3 quantitatively via the selective oxidation of the thioether moieties into their respective sulfones. All of the copolymers, TCP1–3 and OTCP1–3, underwent structural analysis by various techniques; namely, 1H- and 13C-nuclear magnetic resonance (NMR), Fourier transform infrared (FTIR), X-ray photoelectron spectroscopy (XPS), and gel permeation chromatography (GPC). The copolymers were tested as potent lithium ions adsorbents revealing a maximum adsorption (qm) value of 2.31 mg g−1 for OTCP2. Furthermore, this same copolymer was found to be a promising adsorbent of methylene blue (MEB); an isothermal adsorption study divulged that OTCP2’s uptake of MEB from an aqueous solution (following the Langmuir model) was, at maximum adsorption capacity, (qm) of 480.77 mg g−1; whereas the kinetic study divulged that the adsorption follows pseudo second-order kinetics with an equilibrium adsorption capacity (qe,cal) of 45.40 mg g−1.

High Uptake of the Carcinogenic Pararosaniline Hydrochloride Dye from Water Using Carbazole-Containing Conjugated Copolymers Synthesized from a One-Pot Cyclopentannulation Reaction

“…On the other hand, the linear equation employed to express the Freundlich isotherm model was given as follows: normalLog .1em italicq normale = normalLog .1em italicK normalF + 1 / italicn normalLog .1em italicC normale Where q e (mg g –1 ) denotes the equilibrium uptake capacity, C e (mg L –1 ) represents the equilibrium concentration of the dye, and q m (mg g –1 ) indicates the maximum uptake capacity. K L depicts a Langmuir constant whereas the constants K F and n represent the Freundlich sorption capacity and sorption intensity, respectively …”

“…K L depicts a Langmuir constant whereas the constants K F and n represent the Freundlich sorption capacity and sorption intensity, respectively. 35 2.3.2. Adsorption Kinetics of BR9 on CAP1−3.…”

“…The Langmuir and Freundlich isotherm models were used to fit the adsorption isotherm data obtained for BR9. 35 Figure 5 illustrates the Langmuir parameters computed by plotting 1/q e versus 1/C e whereas the parameters for Freundlich were calculated from the graph of log q e against log C e . The two models were utilized to determine the equilibrium data determined for BR9 uptake by CAP3 (Table 2).…”

“…Furthermore, to investigate the maximum adsorption capacity ( q m ) of BR9 by CAP1–3 , the uptake isotherm tests were performed by making a variety of aqueous solutions of BR9 whose concentrations ranged between 50 and 600 mg L –1 . The Langmuir and Freundlich isotherm models were used to fit the adsorption isotherm data obtained for BR9 …”

Multistep synthesis and X-ray structures of carboxyl-terminated hybrid iron(ii) phthalocyaninatoclathrochelates and their postsynthetic transformation into polytopic carboranyl-containing derivatives

“…Moreover, mono- and dinuclear macrobicyclic complexes of this type with terminal donor group(s) were earlier reported to be suitable 3D-metalloligands and rigid cage monomers. They can undergo a coordination-driven assembly with appropriate metal ions or the “classical” organic coupling reactions, thus giving clathrochelate-based coordination and covalent polymers, 6 MOFs, 7 coordination capsules 8 and polynuclear complexes 9 as prospective (supra)molecular devices, and innovative porous and catalytic materials as well.…”