Abstract
Equilibrium adsorbed amounts of manganese on porphyrins were determined at 288 K and 308 K using the quartz crystal microbalance strategy. The experimental measurements were achieved in order to compare the adsorption capacities of the tetratolylporphyrin and the tetraphenylporphyrin for ionophore investigation. The aim of this work is to examine these isotherms at the ionic scale in order to elucidate physical clarifications about the microscopic interactions between the manganese ions and the two complexing porphyrins (TTP and TPP). Indeed, statistical physics formalism is employed by the intermediate of the parameters contained in the expressions of the single-layer and the quadruple-layer models to evaluate the materials employed for ionophore fabrication. Results indicated that high attraction was shown between manganese ions and the sites of tetratolylporphyrins. Energetic investigation (through statistical physics approach and density functional theory method) revealed that the Mn–TTP complex was chemically bonded. The interpretation of the van der Waals parameters confirms the highest stability of the Mn(Cl)2–TTP among all complexes. This study contributes new tips on the theoretical and the experimental understanding of ionophore adsorption. The novel results of this research are the Mn(Cl)2 is the most useful adsorbate material because chlorine ions do not have any impact on the complexation mechanism and the tetratolylporphyrin is the finest complexing adsorbent in terms of stability.
Highlights
IntroductionConsistent with earlier reports, it was discovered that singlelayer or multi-layer films of adsorbed ion (Zn2+, Mg2+, Fe3+, K+, Na+, etc.) based functionalized porphyrin or other macrocycle molecules (e.g., helicenes) can be acquired on solid supports of quartz crystals. The quartz crystal microbalance (QCM) method involves the preparation of a thin-film of composite coated on the quartz crystal, which is proven to be very reproducible and permits outstanding control over the adsorbed film thickness. It should be noted that the quartz crystal microbalance was proven more efficient than other immobilization approaches (e.g., direct adsorption method). this strategy consists of the deposition of a substrate volume of porphyrin by spin coating on the larger gold electrode of the crystal to cover the overlapping electrode portion
Consistent with earlier reports, it was discovered that singlelayer or multi-layer films of adsorbed ion (Zn2+, Mg2+, Fe3+, K+, Na+, etc.) based functionalized porphyrin or other macrocycle molecules can be acquired on solid supports of quartz crystals.1–4 The quartz crystal microbalance (QCM) method involves the preparation of a thin-film of composite coated on the quartz crystal, which is proven to be very reproducible and permits outstanding control over the adsorbed film thickness.5–8 It should be noted that the quartz crystal microbalance was proven more efficient than other immobilization approaches.5,8 this strategy consists of the deposition of a substrate volume of porphyrin by spin coating on the larger gold electrode of the crystal to cover the overlapping electrode portion
Statistical physics formalism is employed by the intermediate of the parameters contained in the expressions of the singlelayer and the quadruple-layer models to evaluate the materials employed for ionophore fabrication
Summary
Consistent with earlier reports, it was discovered that singlelayer or multi-layer films of adsorbed ion (Zn2+, Mg2+, Fe3+, K+, Na+, etc.) based functionalized porphyrin or other macrocycle molecules (e.g., helicenes) can be acquired on solid supports of quartz crystals. The quartz crystal microbalance (QCM) method involves the preparation of a thin-film of composite coated on the quartz crystal, which is proven to be very reproducible and permits outstanding control over the adsorbed film thickness. It should be noted that the quartz crystal microbalance was proven more efficient than other immobilization approaches (e.g., direct adsorption method). this strategy consists of the deposition of a substrate volume of porphyrin by spin coating on the larger gold electrode of the crystal to cover the overlapping electrode portion. Consistent with earlier reports, it was discovered that singlelayer or multi-layer films of adsorbed ion (Zn2+, Mg2+, Fe3+, K+, Na+, etc.) based functionalized porphyrin or other macrocycle molecules (e.g., helicenes) can be acquired on solid supports of quartz crystals.. The quartz crystal microbalance (QCM) method involves the preparation of a thin-film of composite coated on the quartz crystal, which is proven to be very reproducible and permits outstanding control over the adsorbed film thickness.. It should be noted that the quartz crystal microbalance was proven more efficient than other immobilization approaches (e.g., direct adsorption method).. It should be noted that the quartz crystal microbalance was proven more efficient than other immobilization approaches (e.g., direct adsorption method).5,8 This strategy consists of the deposition of a substrate volume of porphyrin by spin coating on the larger gold electrode of the crystal to cover the overlapping electrode portion. The target was to acquire suitable films, which should be homogeneous over the entire area of the quartz crystal. It ought to be remembered that the QCM strategy was dedicated for the achievement of experimental adsorption isotherms by detecting the complexed masses of metallic ions for a wide concentration range under various temperatures
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