scholarly journals Statistical Physics Modeling of Sorption Isotherms of Aluminum, Iron, and Indium on Tetraphenylporphyrin (H2TPP) and Tetrakis(4-tolylphenyl)porphyrin (H2TTPP): Phenomenological Investigation of Metalloporphyrins at the Molecular Level

2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Zaineb Elqahtani ◽  
Mohamed Ben Yahia ◽  
Nada Alfryyan ◽  
Shatha Aldaghfaq ◽  
Fatma Aouaini
Keyword(s):  
Aluminum Chloride ◽  
Statistical Physics ◽  
Chloride Ions ◽  
Iron Chloride ◽  
Lateral Interaction ◽  
Layer By Layer ◽  
Adsorption Model ◽  
Indium Chloride ◽  
Adsorption Mechanisms ◽  
Physics Modeling

A quartz crystal adsorbent functionalized with two promising porphyrins (the 5,10,15,20-tetrakis(4-tolylphenyl)porphyrin and the 5,10,15,20-tetraphenylporphyrin) was applied for the investigation of the adsorption phenomenon of aluminum chloride, iron chloride, and indium chloride. The aim is to prove new insights about the appropriate adsorption materials for metalloporphyrin fabrication. The equilibrium isotherms were measured at five adsorption temperatures (from 290 to 330 K) through the microbalance (QCM) method. The discussion of the experimental observations indicated that the adsorption of the aluminum chloride and the iron chloride was performed via a monolayer process. On contrary, the participation of the chloride ions in the double-layer adsorption of the indium chloride was explained by the layer-by-layer process. Overall, the statistical physics modeling of the experimental curves indicated that the number of ions per adsorbent site n was found inferior to 1 for all the adsorption systems (multi-interaction process for the three ions). Interestingly, the physicochemical investigation of the three adopted models showed that the complexation mechanism of the tested porphyrins was an endothermic process since the two steric parameters ( n and P M ) increased with the rise of the temperature. The FeCl3 curves were discussed via a monolayer adsorption model which includes the parameters a and b (lateral interaction description), indicating the lowest stability of the formed iron-porphyrin complex. The energetic study showed that the adsorption energies ∣ − Δ E 1 / 2 ∣ of AlCl3 on H2TTPP and H2TPP are superior to 40 kJ/mol (chemical adsorption mechanism), whereas the adsorption mechanisms of FeCl3 and InCl3 took place via a physical process since they presented adsorption energy values lower than 40 kJ/mol.

scholarly journals New insights on microscopic properties of metal-porphyrin complexes attached to quartz crystal sensor

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Haifa Alyousef ◽  
Badriah M. Alotaibi ◽  
Mohamed Ben Yahia ◽  
Meznah M. Alanazi ◽  
Norah A. Alsaif
Keyword(s):  
Quartz Crystal ◽  
Single Layer ◽  
Ideal Gas ◽  
Chloride Ions ◽  
Double Layers ◽  
Layer By Layer ◽  
Metallic Ions ◽  
Adsorption Model ◽  
Metal Porphyrin ◽  
Layer Adsorption

AbstractA quartz crystal adsorbent coated with 5,10,15,20-tetrakis(4-methylphenyl) porphyrin was used to examine the complexation phenomenon of three metallic ions [aluminum(III), iron(III) and indium(III)]. The aim is to select the appropriate adsorbate for metalloporphyrin fabrication. The equilibrium adsorption isotherms of tetrakis(4-methylphenyl) porphyrin were performed at four temperatures (from 300 to 330 K) through the quartz crystal microbalance (QCM) method. Subsequently, the experimental data were analyzed in order to develop a thorough explanation of the complexation mechanisms. The experimental results indicated that the aluminum(III) chloride is the adequate material for metalloporphyrin application. Theoretical investigation was established through physics adsorption models in order to analyze the experimental isotherms. The AlCl3 isotherms were modeled via a single-layer adsorption model which is developed using the ideal gas law. Whereas, the FeCl3 isotherms were interpreted via a single-layer adsorption which includes the lateral interactions parameters (real gas law), indicating the lowest stability of the formed iron-porphyrin complex. The participation of the chloride ions in the double-layers adsorption of InCl3 was interpreted via layer by layer formulation. Interestingly, the physicochemical investigation of the three adopted models indicated that the tetrakis(4-methylphenyl) porphyrin adsorption was an endothermic process and that the aluminum(III) chloride can be recommended for an industrial application because it presents the highest adsorption energy (chemical bonds with porphyrins).

scholarly journals Suicide by intoxication with iron (III) chloride

2021 ◽  
Author(s):  
Sławomir Majdanik ◽  
Barbara Potocka-Banaś ◽  
Sebastian Glowinski ◽  
Krzysztof Borowiak
Keyword(s):  
Prussian Blue ◽  
Chloride Ions ◽  
Iron Chloride ◽  
Histopathological Analysis ◽  
Fatal Intoxication ◽  
Internal Organs ◽  
Specific Staining ◽  
Iron Supplements ◽  
Staining Protocol ◽  
Hematoxylin And Eosin

Abstract Purpose Cases of iron intoxication are not very often encountered in toxicology practice, and most of those reported concern accidental intoxications with iron supplements in young children. The paper presents a rare case of a suicide by intoxication in an adult woman who ingested a solution of iron (III) chloride. Methods A forensic was at the Department of Forensic Medicine, PMU in Szczecin. Toxicology tests of blood sampled from the deceased were performed using a 644 CIBA CORNING ion selective analyzer and proprietary reagent kits. Histopathological was with the use of the standard staining protocol (hematoxylin and eosin) and staining specific for iron (Prussian blue). Results Autopsy revealed a distinct yellow discolouration and thrombotic necrosis of the oral mucosa and almost the whole gastrointestinal tract, as well as similar changes in the adjacent internal organs. Considerably high levels of iron and chloride ions were detected in specimens of internal organs preserved during autopsy. Histopathological analysis performed with the use of staining specific for iron (Prussian blue) also confirmed the presence of iron in the examined tissues, especially in the intestines and liver. Conclusions Considering the above findings, it was concluded in the forensic report that the death of the woman was caused by the ingestion of iron chloride. The reported case of fatal intoxication is one of the few described in the literature, and its course implies that in the case of initially diagnosed intoxication with corrosive compounds, the possibility of using metal-containing poison should also be considered in the differential diagnosis. In addition to routine toxicological tests performed in fatal cases we also draw attention to the possibility of using specific staining protocols for microscopic specimens.

Adsorption of diclofenac and nimesulide on activated carbon: Statistical physics modeling and effect of adsorbate size

2017 ◽  
Vol 109 ◽  
pp. 117-123 ◽  
Author(s):  
Lotfi Sellaoui ◽  
Nesrine Mechi ◽  
Éder Cláudio Lima ◽  
Guilherme Luiz Dotto ◽  
Abdelmottaleb Ben Lamine
Keyword(s):  
Activated Carbon ◽  
Statistical Physics ◽  
Physics Modeling

scholarly journals Advanced statistical physics modeling of a chiral molecular tweezer of silver ion: Microscopic investigation of adsorption of silver(I) on hexahelicene and heptahelicene

AIP Advances ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 105229
Author(s):  
Entesar Sulaiman Almogait ◽  
Mohamed Ben Yahia ◽  
Hanan Al-Ghamdi ◽  
Aljawharah Hamad Almuqrin
Keyword(s):  
Statistical Physics ◽  
Microscopic Investigation ◽  
Silver Ion ◽  
Physics Modeling ◽  
Molecular Tweezer

scholarly journals Chitosan-Based Nanocomposites for Glyphosate Detection Using Surface Plasmon Resonance Sensor

Sensors ◽  
2020 ◽  
Vol 20 (20) ◽  
pp. 5942
Author(s):  
Minh Huy Do ◽  
Brigitte Dubreuil ◽  
Jérôme Peydecastaing ◽  
Guadalupe Vaca-Medina ◽  
Tran-Thi Nhu-Trang ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Optical Method ◽  
Outer Sphere ◽  
Steric Interaction ◽  
Adsorption Model ◽  
Surface Complexes ◽  
Adsorption Mechanisms ◽  
Resonance Sensor

This article describes an optical method based on the association of surface plasmon resonance (SPR) with chitosan (CS) film and its nanocomposites, including zinc oxide (ZnO) or graphene oxide (GO) for glyphosate detection. CS and CS/ZnO or CS/GO thin films were deposited on an Au chip using the spin coating technique. The characterization, morphology, and composition of these films were performed by Fourier-transform infrared spectroscopy (FTIR), atomic force microscopy (AFM), and contact angle technique. Sensor preparation conditions including the cross-linking and mobile phase (pH and salinity) were investigated and thoroughly optimized. Results showed that the CS/ZnO thin-film composite provides the highest sensitivity for glyphosate sensing with a low detection limit of 8 nM and with high reproducibility. From the Langmuir-type adsorption model and the effect of ionic strength, the adsorption mechanisms of glyphosate could be controlled by electrostatic and steric interaction with possible formation of 1:1 outer-sphere surface complexes. The selectivity of the optical method was investigated with respect to the sorption of glyphosate metabolite (aminomethylphosphonic acid) (AMPA), glufosinate, and one of the glufonisate metabolites (3-methyl-phosphinico-propionic acid) (MPPA). Results showed that the SPR sensor offers a very good selectivity for glyphosate, but the competition of other molecules could still occur in aqueous systems.

Statistical physics modeling and optimization of norfloxacin adsorption onto graphene oxide

2020 ◽  
Vol 606 ◽  
pp. 125534
Author(s):  
Yuri Abner Rocha Lebron ◽  
Victor Rezende Moreira ◽  
Guilherme Pinheiro Drumond ◽  
Guilherme Coutinho Ferreira Gomes ◽  
Marielle Mara da Silva ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Statistical Physics ◽  
Modeling And Optimization ◽  
Physics Modeling
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