Article
Materials Science, Multidisciplinary
Mona Alleshagh, Samahe Sadjadi, Hassan Arabi, Naeimeh Bahri-Laleh, Eric Monflier
Summary: A novel catalytic composite was designed using the synergism between chitosan and halloysite for promoting hydrogenation of PAO oils; by optimizing reaction conditions and investigating the effect of catalyst composition on performance, high yield of hydrogenated product was achieved; the high recyclability and heterogeneous nature of the catalyst were confirmed in the experiments, and the positive effect of hybridization of halloysite and chitosan on catalytic activity was also validated.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Inorganic & Nuclear
Zahra Asadi, Samahe Sadjadi, Mehdi Nekoomanesh-Haghighi, Naeimeh Bahri-Laleh
Summary: In this study, we investigated the effect of acid-treatment of halloysite on its performance as a support for immobilizing Pd nanoparticles. We found that long-time acid-treatment significantly increased the specific surface area and induced formation of fine particles within the lumen of halloysite, while short-time acid-treatment slightly increased the specific surface area and remarkably decreased Pd loading. The activity of the synthesized catalysts followed the order of Pd/Hal > Pd/Hal-A72 > Pd/Hal-A9, demonstrating the importance of Pd loading and accessibility of Pd nanoparticles in the catalysis of PAO hydrogenation containing structurally big molecules.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Alireza Bayat, Samahe Sadjadi, Hassan Arabi, Naeimeh Bahri-Laleh
Summary: A composite material composed of halloysite clay and ionic liquid is reported in this study, which can be used for both oligomerization and hydrogenation processes. The PAO obtained from this catalytic system exhibits a uniform microstructure and high performance. The palladated composite shows good catalytic activity and recyclability.
RESEARCH ON CHEMICAL INTERMEDIATES
(2022)
Article
Chemistry, Physical
Samahe Sadjadi, Fatemeh Koohestani, Gerard Pareras, Mehdi Nekoomanesh-Haghighi, Naeimeh Bahri-Laleh, Albert Poater
Summary: The study identified the optimum heterocyclic ligand for the decoration of halloysite support through computational methods, and investigated its performance in interaction with Pd nanoparticles. The catalyst prepared with ionic liquid exhibited superior activity in hydrogenation reactions, showing high recyclability and stability.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Inorganic & Nuclear
Samahe Sadjadi, Fatemeh Koohestani
Summary: Cl-functionalized halloysite nanoclay was modified to prepare a hybrid catalyst for the hydrogenation of nitro compounds. The catalyst showed high selectivity towards the hydrogenation of nitro group and could produce high yields of hydrogenated products at ambient temperature and low pressure. Recycling experiments demonstrated that the catalyst could maintain its activity with slight Pd leaching.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
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
Samahe Sadjadi, Fatemeh Koohestani
Summary: A novel composite of metal-organic framework and perlite was prepared and utilized as a support for Pd nanoparticles, showing excellent catalytic performance in the hydrogenation of nitroarenes. The catalyst efficiently promoted hydrogenation of various nitroarenes with high selectivity towards nitro groups, while also exhibiting good recyclability and low Pd leaching. Comparative study confirmed the superior activity of the composite compared to other materials.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Chemistry, Multidisciplinary
Fanxiang Meng, Lu Wang, Haijun Yan, Meng Zhang, Jide Wang, Ling Zhao, Chao Yang, Ronglan Wu
Summary: A new bismuth-based catalyst was prepared using halloysite nanotubes as a carrier and effectively used for acetylene hydrochlorination. The proposed Bi/HNT catalyst showed promising catalytic performance. Loss of active species (Bi species) and accumulation of carbon deposition on the surface are the main reasons for the deactivation of the Bi/HNT catalyst.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Applied
Cristian H. Campos, Krishnamoorthy Shanmugaraj, Tatiana M. Bustamante, Edgardo Leal-Villarroel, Victor Vinoth, Radhamanohar Aepuru, Ramalinga Viswanathan Mangalaraja, Cecilia C. Torres
Summary: Pt-nanoparticles supported on halloysite-nanotubes were selectively deposited onto the inner or outer surface to evaluate their stability and catalytic performance for hydrogenation reactions. Pt(IN)/HNT catalyst showed better performance and stability compared to Pt(OUT)/HNT, with the latter retaining catalytic activity after 15 cycles.
Article
Chemistry, Multidisciplinary
Min Sheng, Sho Yamaguchi, Ayako Nakata, Seiji Yamazoe, Kiyotaka Nakajima, Jun Yamasaki, Tomoo Mizugaki, Takato Mitsudome
Summary: An air-stable, active, and reusable non-noble-metal-based heterogeneous catalyst, hydrotalcite-supported cobalt phosphide nanorods (Co2P NR/HT), has been developed for the selective hydrogenation of nitriles to primary amines. The catalyst shows broad substrate generality and high activity under mild conditions, enabling nitrile hydrogenation with high yields without the need for ammonia.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Chemistry, Physical
Samahe Sadjadi, Neda Abedian-Dehaghani, Xuemin Zhong, Majid M. Heravi, Peng Yuan
Summary: Three different acidic ionic liquids were grafted onto halloysite to form heterogeneous catalysts. The catalysts exhibited higher acidity than halloysite, which varied depending on the type of ionic liquid. Among them, imidazolium-based ionic liquid showed the highest catalytic activity.
APPLIED CLAY SCIENCE
(2023)
Article
Polymer Science
Junjie Liu, Mingqi Jia, Fei Yuan, Zitong Hong, Weichao Tong, Chengzhuo Zheng, Chuanqi Wang, Hui Wang
Summary: Hydrogenated nitrile butadiene rubber (HNBR) is a high-performance elastomer widely used in the petrochemical and automotive industries. A ruthenium-based catalyst, M41, was investigated for the direct hydrogenation of NBR latex. The catalytic selectivity for the hydrogenation of -C=C bond instead of -C=N group was confirmed, and the reaction conditions were optimized to obtain high conversion of over 95 mol%. The results suggest that this catalyst could address the limitations in the hydrogenation of NBR latex.
POLYMER INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Sahar Karimi, Naeimeh Bahri-Laleh, Gerard Pareras, Samahe Sadjadi, Mehdi Nekoomanesh-Haghighi, Albert Poater
Summary: By combining computational and experimental studies, a novel nanocomposite was developed using natural materials for hydrofinishing of poly alpha-olefin oils. The resulting catalyst exhibited excellent performance under mild reaction conditions and good recyclability.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Chemistry, Analytical
Esma Yildiz, Beste Yurdacan, Yasemin Erac, Arzum Erdem
Summary: In this study, a pencil graphite electrode was modified with a halloysite nanoclay-ionic liquid nanocomposite for the sensitive and selective determination of miRNA-21 through differential pulse voltammetry and nucleic acid hybridization.
Article
Chemistry, Physical
Kainaubek Toshtay, Ali Auyezov, Yermek Aubakirov, Rachid Amrousse, Seitkhan Azat, Yerbolat Sailaukhanuly, Ulantay Nakan
Summary: Comparative testing was conducted to compare the activity of low-percentage palladium and palladium-nickel catalysts with a commercial nickel catalyst in the hydrogenation process of polyalphaolefins (PAO-4). The palladium catalysts showed higher activity, reduced process time, and a higher degree of hydrogenation compared to the nickel catalysts. The bimetallic catalysts had lower activity than the monometallic palladium catalysts. The physicochemical characteristics of the catalysts and polyalphaolefin oils were also determined.
CATALYSIS SURVEYS FROM ASIA
(2023)
Article
Polymer Science
Zahra Izadi, Mehdi Nekoomanesh-Haghighi, Samahe Sadjadi, Mostafa Ahmadi, Naeimeh Bahri-Laleh
Summary: This study assessed the replacement of AlCl3 with other Al-based compounds or an environmentally friendly deep eutectic solvent (DES) in alpha-olefin oligomerization. The results showed that using DES as the main component of the initiating system not only reduces the need for hazardous and corrosive Al compounds, but also favors the production of low viscosity PAO oils, which have a significant share in the PAO market.
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
Samahe Sadjadi, Neda Abedian-Dehaghani, Xuemin Zhong, Majid M. Heravi, Peng Yuan
Summary: Three different acidic ionic liquids were grafted onto halloysite to form heterogeneous catalysts. The catalysts exhibited higher acidity than halloysite, which varied depending on the type of ionic liquid. Among them, imidazolium-based ionic liquid showed the highest catalytic activity.
APPLIED CLAY SCIENCE
(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
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
Chemistry, Physical
Xuemin Zhong, Peng Yuan, Samahe Sadjadi, Dong Liu, Yanfu Wei
Summary: Palygorskite-supported ruthenium catalysts were developed for the efficient and selective oxidation of HMF to DFF. The catalyst exhibited excellent performance with 100% HMF conversion, 98% DFF yield, and 98% DFF selectivity under optimal reaction conditions. The synergistic effect of Ru nanoparticles and palygorskite enhanced the catalytic activity.
APPLIED CLAY SCIENCE
(2023)
Article
Chemistry, Applied
Masoume Malmir, Majid M. Heravi, Ghazaleh Jahani
Summary: Metal-organic frameworks (MOFs) are viable and environmentally friendly alternatives to traditional catalysts, and the magnetic Ox-CN-Cu-MOF catalyst has shown remarkable catalytic performance due to its unique structure and Lewis acidic properties. It also exhibits excellent recyclability.
APPLIED ORGANOMETALLIC CHEMISTRY
(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
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)