Article
Chemistry, Physical
Augusto L. P. de Meireles, Kelly A. da Silva Rocha, Elena F. Kozhevnikova, Ivan V. Kozhevnikov, Elena V. Gusevskaya
Summary: The H3PW12O40 heteropoly acid supported on SiO2 as a catalyst and its bulk acidic cesium salt Cs2.5H0.5PW12O40 have been demonstrated to be highly active and recyclable for the Prins cyclization reaction, leading to the efficient synthesis of the valuable floral odorant Florol? from isoprenol and isovaleraldehyde. The use of dimethylcarbonate or diethylcarbonate as green reaction media, along with low catalyst loadings and moderate conditions, contribute to the sustainability of the method.
MOLECULAR CATALYSIS
(2021)
Review
Chemistry, Medicinal
Ivan A. Yaremenko, Peter S. Radulov, Yulia Yu. Belyakova, Dmitriy I. Fomenkov, Svetlana B. Tsogoeva, Alexander O. Terent'ev
Summary: This article summarizes the main achievements in the synthesis of organic peroxides using Lewis acids and heteropoly acids for the first time. It is divided into three parts: (1) the application of metal-based Lewis acids in the synthesis of organic peroxides; (2) the synthesis of organic peroxides promoted by non-metal-based Lewis acids; and (3) the application of heteropoly acids in the synthesis of organic peroxides. The information covered in this review will be useful for specialists in organic synthesis, reactions and processes of oxygen-containing compounds, catalysis, pharmaceuticals, and materials engineering.
Article
Chemistry, Physical
Luke Forster, Zhipeng Qie, Min Hu, Aristarchos Mavridis, Cameron Price, Christopher M. A. Parlett, Xiaolei Fan, Carmine D'Agostino
Summary: This paper investigates the effect of different parameters on the structural properties and surface adsorption of supported solid acid catalysts. The results show that doping with STA can increase the adsorption properties of the catalyst, especially for gamma-/theta-Al2O3. Thermogravimetric analysis suggests that zirconia-grafted and non-grafted theta-Al2O3 and gamma-Al2O3 can improve the thermal stability of STA.
APPLIED SURFACE SCIENCE
(2022)
Review
Chemistry, Physical
Angelica M. Escobar, Guillermo Blustein, Rafael Luque, Gustavo P. Romanelli
Summary: POM, as solid catalysts, have strong acidity and efficient oxidizing properties, making them potential catalysts in organic synthesis.
Article
Energy & Fuels
Reem Ghubayra, Rana Yahya, Elena F. Kozhevnikova, Ivan Kozhevnikov
Summary: The Keggin-type heteropoly acids H3PMo12O40 and H3PW12O40 supported on activated carbon demonstrated high catalytic activity for oxidative desulfurization of model diesel fuel, influenced by the basicity of the carbon support. These catalysts, particularly the decomposed H3PW12O40, outperformed other heterogeneous catalysts for ODS by efficiently removing DBT from the fuel with high H2O2 efficiency and the ability to be recovered and reused without loss of activity. Additionally, DRIFTS studies provided insight into the mechanism of ODS reaction on carbon-supported HPAs.
Article
Chemistry, Organic
Dipak S. Aher, Kiran R. Khillare, Laxmikant D. Chavan, Vinod A. Shelke, Sunil G. Shankarwar
Summary: Vanadium substituted Molybdotungstophosphoric acid (H5PW6Mo4V2O40 center dot 14H(2)O) was found to be an effective solid catalyst for the one-pot synthesis of several quinoxaline derivatives from the condensation reaction between various substituted o-phenylenediamine and various aromatic benzil compounds in ethanol: water (1:1) solvent under reflux conditions. The synthetic route exhibited excellent yield, short reaction time, simple workup procedure, and reusability of the catalyst.
SYNTHETIC COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Tianyu Gao, Zhen Yan, Vitaly Ordomsky, Sebastien Paul
Summary: Covalent organic frameworks (COFs) are a rapidly developing field in material chemistry. In this work, a method for synthesizing crystalline composite based on phosphotungstic acid and 2D imine COF is demonstrated, which shows high activity and stability.
Review
Chemistry, Applied
Gabriel Aguirre-Cruz, Felipe Legorreta-Garcia, Gael Aguirre-Cruz, Lia Stanciu, Gabriel Aguirre-Alvarez
Summary: Novel pure-silica hierarchical zeolite molecular sieves have shown great potential for adsorption and heterogenous catalysis. They surpass conventional zeolites in terms of diffusion and reusability. This review discusses various synthesis routes and methods for these materials, as well as their applications in catalysis and mass transport. The study also addresses the synthesis principles and mechanisms related to the production of mesoporous pure silica zeolites. These materials exhibit high catalytic activity and structural stability, making them an eco-friendly alternative to traditional catalytic platforms.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Review
Chemistry, Physical
Shafaq Nisar, Muhammad Asif Hanif, Umer Rashid, Asma Hanif, Muhammad Nadeem Akhtar, Chawalit Ngamcharussrivichai
Summary: The production of fatty acid methyl esters requires the use of cost-effective, environmentally friendly, and effective catalysts. Currently, alkaline and acidic catalysts in both homogeneous and heterogeneous phases are widely used. Promising catalysts include heteropoly acids, polyoxometalate compounds, carbonaceous materials, and vanadium phosphate. Biocatalysts, especially lipase, are also gaining attention for large-scale FAME production. Future directions include exploring the possibilities of these catalysts in biodiesel production.
Review
Biochemistry & Molecular Biology
Thangapandi Chellapandi, Gunabalan Madhumitha
Summary: The use of montmorillonite clay as a solid catalyst for liquid phase organic synthesis has gained significant attention, particularly in the synthesis of heterogeneous nanoparticles. The robust and environmentally friendly nature of montmorillonite-based nanocatalysts makes them widely used in N-heterocyclic reactions. This review focuses on the synthesis of N-heterocycles using montmorillonite-based composite catalysts, highlighting their structural stability, metal leaching incidence, reusability, and recent developments in heterogeneous catalysis.
MOLECULAR DIVERSITY
(2022)
Review
Energy & Fuels
Marcio Jose da Silva, Neide Paloma Goncalves Lopes, Alana Alves Rodrigues
Summary: This article discusses the chemical transformation of glycerol to various compounds with high technological applications, especially in the fuel sector as bioadditives. The Keggin heteropolyacids (HPAs) are efficient catalysts in the syntheses of glycerol-derived bioadditives. However, their use as heterogeneous catalysts is hindered by their low surface area and solubility in polar solvents. Solid heteropoly salts, formed by converting HPAs to insoluble salts, have shown promise in reducing the cost and environmental impact of bioadditive synthesis processes.
Article
Materials Science, Ceramics
W. S. Abo El-Yazeed, O. R. Hayes, Awad I. Ahmed
Summary: Phosphotungestic acid supported on mesoporous MCM-41 coated NiFe2O4 magnetic nanoparticles were prepared as efficient and recyclable heterogeneous catalysts for synthesizing coumarin and xanthene derivatives. The catalysts show advantages in easy recovery, simple preparation, high stability, good catalytic performance, short reaction time, and environmentally friendly reaction conditions.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Ben Ma, Qi Xia, Deyang Wang, Ji-Kang Jin, Zekun Li, Qiu-Jiang Liang, Meng-Ying Sun, Dongyi Liu, Li-Juan Liu, Hui-Xing Shu, Jun Yang, Dan Li, Jian He
Summary: Visible-light copper photocatalysis has become a viable technology for sustainable synthetic processes. In this study, a metal-organic framework (MOF)-supported copper(I) photocatalyst was developed for iminyl radical-mediated reactions. The heterogenized copper photosensitizer exhibited higher catalytic activity than its homogeneous counterpart due to site isolation. The immobilization of copper species on MOF supports using a hydroxamic acid linker allowed for high recyclability of the heterogeneous catalysts and the preparation of previously unavailable monomeric copper species through post-synthetic modification on MOF surfaces. This study highlights the potential of MOF-based heterogeneous catalytic systems in addressing challenges in synthetic methodologies and mechanistic investigations of transition-metal photoredox catalysis.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Review
Materials Science, Paper & Wood
Samir Kamel, Tawfik A. Khattab
Summary: Organic reactions typically involve catalysts and solvents that can be harmful to the environment, but recent advancements in science and technology have led to a shift towards eco-friendly and sustainable resources, with nanocatalysis emerging as a promising field. Metal nanoparticles supported by cellulose offer high reactivity and productivity, enabling green and sustainable chemical transformations. Control over the characteristics of metal nanoparticles, such as structural morphology and particle size, is crucial for optimizing their catalytic activity.
Review
Chemistry, Multidisciplinary
Alberto Lopez-Magano, Saba Daliran, Ali Reza Oveisi, Ruben Mas-Balleste, Amarajothi Dhakshinamoorthy, Jose Aleman, Hermenegildo Garcia, Rafael Luque
Summary: Organic photochemistry developed significantly in the 1980s, providing insights into the excited electronic states and transfer processes. This knowledge has been applied to the design of COFs as visible-light photocatalysts. COFs are crystalline porous materials with excellent tunability, porosity, stability, and photoelectronic properties, making them potential candidates in various research areas.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Samahe Sadjadi, Sara Tarighi, Ali Afshar Ebrahimi
Summary: Two novel composites, composed of MIL-101 and ZSM-5 zeolites with different SiO2/Al2O3 ratios, were synthesized via surface functionalization of ZSM-5 zeolites and subsequent hydrothermal treatment with MIL-101 precursors. These composites demonstrated higher catalytic activity than their individual components in Knoevenagel condensation reaction, indicating the synergism between ZSM-5 and MIL-101. Additionally, the composites showed broad substrate scope, facile catalyst recovery, and high recyclability.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Review
Chemistry, Organic
Majid M. Heravi, Batoul Alipour, Vahideh Zadsirjan, Masoume Malmir
Summary: The Robinson annulation is a significant reaction for the synthesis of alpha,beta-unsaturated ketone ring that involves the generation of two C-C bonds. It has been frequently used in the total synthesis of biologically active natural products. These products and their derivatives play a major role in pharmacotherapy, especially for cancer and infectious diseases.
ASIAN JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Masoume Malmir, Majid M. Heravi, Zahra Yekke-Ghasemi, Satar Saberi, Masoud Mirzaei
Summary: A new heterogeneous catalyst, TBA8[Zr(W5O18)2]middot17H2O (Zr(W5)2), was synthesized and characterized. It was found that the catalyst had a sandwich-type structure consisting of zirconium ions and mono-lacunary Lindqvist [W5O18 ]4- anions, encapsulated by TBA+ cations. This catalyst exhibited hydrophobic properties and improved catalytic efficiency by trapping reactants on its surface. Using Zr(W5)2 as a catalyst, a series of 1,5-benzodiazepines were successfully synthesized via mild and solvent-free reactions.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Chemistry, Physical
Mahtab Shokri, Sara Tarighi, Mohammad Ali Faramarzi, Samahe Sadjadi, Soamyeh Mojtabavi
Summary: In this study, two ZSM-5 zeolites with different SiO2/Al2O3 ratios of 200 and 80 were synthesized and functionalized to prepare four biocatalysts for acid orange-7 dye degradation. The results showed that functionalization improved the performance and stability of the catalysts, and the SiO2/Al2O3 ratio had little effect on the stability of the catalysts.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Multidisciplinary Sciences
Samahe Sadjadi, Soheila Yaghoubi, Xuemin Zhong, Peng Yuan, Majid M. Heravi
Summary: In an attempt to prepare a low-cost and efficient acidic heterogeneous catalyst, the acidity of halloysite was improved by covalent grafting of an acidic polyionic liquid. The catalyst showed high efficiency in the conversion of fructose to 5-hydroxymethylfurfural, yielding a high percentage under optimal conditions. Additionally, the catalyst was highly reusable and capable of promoting the conversion of sucrose and maltose as well.
SCIENTIFIC REPORTS
(2023)
Article
Biochemistry & Molecular Biology
Abolfazl Heydari, Milad KhajeHassani, Haniyeh Daneshafruz, Sepideh Hamedi, Faeze Dorchei, Mario Kotlar, Fahimeh Kazeminava, Samahe Sadjadi, Farideh Doostan, Ivan Chodak, Hassan Sheibani
Summary: This study developed a nanocomposite material consisting of thermoplastic starch (TPS) reinforced with bentonite clay (BC) and encapsulated with vitamin B2 (VB). The study investigated the effects of VB on the physicochemical properties of TPS/BC films, including mechanical and thermal properties, water uptake, and weight loss in water. The addition of VB significantly increased the tensile strength and Young's modulus of TPS/BC films, with the highest values observed for nanocomposites containing 5 php of VB and 3 php of BC. The release of VB was controlled by the BC content, with higher BC content leading to lower VB release. These findings demonstrate the potential of TPS/BC/VB nanocomposites as environmentally friendly materials with improved mechanical properties and controlled release of VB, which can have significant applications in the biopolymer industry.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Biotechnology & Applied Microbiology
Masoumeh Bagheri Bisafar, Masoume Malmir, Majid M. Heravi
Summary: In this study, a novel magnetic MOFs-based catalyst was synthesized and showed good catalytic activity and stability for the reduction of nitroarenes and organic dyes. The catalyst can be easily separated and recovered by magnetic separation, and it can be reused for multiple cycles.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2023)
Article
Chemistry, Physical
Samahe Sadjadi, Neda Abedian-Dehaghani, Majid M. Heravi, Xuemin Zhong, Peng Yuan, Josep Duran, Albert Poater, Naeimeh Bahri-Laleh
Summary: Halloysite nanoclay was used as a natural support for an acidic ionic liquid immobilization. The resulting catalyst exhibited improved Bronsted acidity and high recyclability. It effectively promoted the conversion of various carbohydrates to a valuable product under mild reaction conditions.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Polymer Science
Samahe Sadjadi, Abolfazl Heydari
Summary: In this study, a novel composite material was developed by combining β-cyclodextrin nanosponge and sodium alginate to immobilize palladium nanoparticles. The composite beads demonstrated excellent encapsulation capabilities and stability, making them suitable for hydrophobic substrates. The incorporation of cyclodextrin nanosponge within alginate beads improved the performance of the catalyst, allowing selective reduction of the nitro group in substrates with competing functionalities.
Article
Chemistry, Physical
Zahra Izadi Kahkeshi, Naeimeh Bahri-Laleh, Samahe Sadjadi, Mehdi Nekoomanesh Haghighi
Summary: Four novel ionic liquid compounds supported on boehmite were synthesized and used with AlCl3 to polymerize Raffinate 1 to polybutene for viscosity improver applications. The supported ionic liquids were characterized using various analytical techniques. The introduction of the supported ionic liquids resulted in polybutenes with comparable Mn and D values to the blank AlCl3 system but with lower exo-olefins content, making the copolymer more suitable for the target application. The suggested AlCl3/ionic liquid initiating system enables greener polymerization by reducing the dosage of hazardous AlCl3 compared to the blank system.
MOLECULAR CATALYSIS
(2023)
Article
Chemistry, Physical
Miad Mashayekhi, Leila Moballegh, Naeimeh Bahri-Laleh, Samahe Sadjadi, Albert Poater
Summary: This study proposes the reevaluation of a trident cationic initiator system with ionic liquid (IL)/AlCl3/H2O in the cationic polymerization of 1-decene. Different ILs with different cationic moieties were synthesized and evaluated. The IL/AlCl3 system exhibited better performance than the AlCl3/H2O system, improving the molecular weight and viscosity index of the resulting polymer.
MOLECULAR CATALYSIS
(2023)
Article
Biochemistry & Molecular Biology
Alireza Mohammadi, Mohammad Kazemeini, Samahe Sadjadi
Summary: A triple photocatalytic composite was prepared and utilized for the photodegradation of Rhodamine-B (RhB) dye. The highest yield of 96.2% was achieved under specific conditions, and Methyl Orange (MO) dye was also successfully degraded. The kinetic and thermodynamic parameters were determined, and a chemical mechanism was proposed. The catalyst showed significant adsorption capacity and could be reused for multiple cycles with minimal activity loss.
PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES
(2023)
Article
Chemistry, Inorganic & Nuclear
Alireza Bayat, Zohreh Mehri Lighvan, Samahe Sadjadi, Naeimeh Bahri-Laleh, Ali Ghadimi
Summary: A star-like hybrid composite of metal-organic framework with amino-functionalized Fe-based MOF and ZIF components was embedded in chitosan beads and cross-linked with glutaraldehyde to stabilize Pd nanoparticles. The catalytic composite displayed excellent performance in hydrogenation reaction, yielding the product with high conversion and low bromine index under mild reaction conditions. Moreover, the catalyst showed recyclability and little Pd leaching, making it promising for large-scale applications.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Fardin Saghandali, Mohammad Kazemeini, Samahe Sadjadi
Summary: In this study, three Keggin-type heteropolyacids were impregnated on halloysite to produce heterogeneous acidic catalysts for synthesizing 5-HMF. The role of halloysite in the catalyst's acidic properties and performance was found to be important. The reaction parameters for the optimal catalyst were adjusted using Response Surface Methodology, resulting in a 99.5% yield of the target compound after 43 minutes at 125 degrees C in DMSO solvent. Immobilization of silicotungstic acid on halloysite significantly reduced leaching-out, with only a 12.5% loss of activity in five consecutive reaction cycles. The catalyst's activity was also tested on converting different carbohydrates to 5-HMF, with glucose showing the highest product yield of 64.24%. Furthermore, the kinetic and thermodynamic parameters of the conversion of fructose to 5-HMF were determined.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2024)
Article
Multidisciplinary Sciences
Samahe Sadjadi, Sara Tarighi, Motahareh Delangiz, Majid Heravi
Summary: Through a novel hierarchical zeolite catalyst, efficient conversion of glycerol to solketal with a yield of 98% was achieved. The experimental results indicate that the mesoporosity of zeolite and the functionality of ionic liquid play important roles in catalytic performance.
SCIENTIFIC REPORTS
(2023)
