Article
Chemistry, Multidisciplinary
Danlei Xiang, Sheng-Chih Lin, Jiao Deng, Hao Ming Chen, Chong Liu
Summary: The redox-active metal-bound bisulfate ligand introduced by H2SO4 solvent plays a crucial role in vanadium-based electrocatalytic CH4 activation. This finding could potentially lead to environmentally benign catalysis with minimal use of H2SO4.
CHEMICAL COMMUNICATIONS
(2022)
Article
Horticulture
Guy Tamir, Gadi Afik, Shmuel Zilkah, Nir Dai, Asher Bar-Tal
Summary: This study aimed to evaluate the impact of different RNH4+ levels on the acidification of growth medium and nutrient status of blueberry plants. The findings suggest that high levels of RNH4+ can lower pH levels, increase certain mineral concentrations, and improve plant performance. This indicates that increased RNH4+ levels can provide a more environmentally friendly alternative to using sulfuric acid for blueberry production.
SCIENTIA HORTICULTURAE
(2021)
Article
Chemistry, Applied
Rui Sun, Pengchao Qiao, Zhe Wang, Wei Wang
Summary: This study demonstrates the preparation of monodispersed large-pore mesoporous silica nanoparticles using a sulfuric acid assisted hydrothermal process, enabling precise control over drug loading and release performance with high surface area and large mesopore structures.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Engineering, Chemical
Jinling Zhang, Xin Jin, Chaohe Yang
Summary: This study focuses on the effective utilization of waste sulfuric acid to produce poly aluminium sulfate and the deep degradation of organic pollutants through the advanced oxidation process. The results show that the activation of coconut shell-derived biochar with H3PO4 steam introduces acidic groups and metal ions on the surface, promoting efficient organic pollutant degradation. The treated solution is then used to prepare the certified poly aluminium sulfate product. This study is of great significance in the valorization of waste sulfuric acid and the application of recycled agricultural residues in the advanced oxidation process.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Jing Yang, Luzheng Chen, Dandan Wu, Jing Cao, Jinfu Guo
Summary: Ozone was used to oxidize cuprite in a sulfuric acid solution, resulting in a significant improvement in its leaching rate. Various characterizations were conducted to verify the oxidation leaching mechanism and observe the surface morphology of cuprite. The findings suggest that ozone effectively oxidized cuprite and enhanced its leaching process.
ARABIAN JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Yanbin Shi, Yuqin Zhou, Rongzong Shen, Fengzhen Liu, Yurong Zhou
Summary: H2SO4 post-treatment is an effective way to enhance the electrical conductivity of PEDOT:PSS films, with the removal of PSS and redox reaction being the keys to enhancing conductivity. Significantly high conductivity of 6323.9 +/- 364.5 S/cm has been achieved using a two-step H2SO4 post-treatment method for PEDOT:PSS films.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Andreas Roesch, Fabian Seifert, Valentin Vass, Helmar Goerls, Robert Kretschmer
Summary: Eight dinuclear methyl aluminium complexes were synthesized, characterized, and converted successfully. X-ray diffraction analysis provided the solid-state structures of eleven complexes. The catalytic activity of two complexes in ring-opening polymerization was influenced by metal-metal separation and ligand backbone.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Organic
Babak Kaboudin, Masoumeh Sohrabi, Foad Kazemi
Summary: Julolidines were synthesized via a one-pot cascade reaction using silica sulfuric acid as an efficient catalyst under aerobic conditions. The reaction proceeded through imine formation followed by an Aza-Diels-Alder cycloaddition with styrene, providing various julolidine derivatives in good yields under mild and transition metal-free conditions. The catalyst could be recycled and reused multiple times for catalyzing the reaction.
JOURNAL OF HETEROCYCLIC CHEMISTRY
(2021)
Article
Chemistry, Physical
Jing Yang, Yunfeng Shi, Luzheng Chen, Dandan Wu
Summary: In this study, cuprite was oxidized using a novel environmentally-friendly oxidant, chlorine dioxide (ClO2), to enhance the leaching effect in sulfuric acid solution. Experimental results showed that under specific reaction conditions, the addition of ClO2 resulted in a cuprite leaching rate of 90.18%. Surface characterization revealed that the addition of ClO2 oxidized monovalent copper on the cuprite surface to divalent copper, promoting the acidic leaching process of cuprite.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Organic
Kazem Mohammadiannejad, Reza Ranjbar-Karimi, Farzaneh Haghighat
Summary: A series of new formylated-triarylmethanes (FTRAMs) were successfully synthesized via the Friedel-Crafts reaction of arenes with terephthalaldehyde or isophthalaldehyde in the presence of silica sulfuric acid (SSA) under solvent-free conditions. Subsequently, a series of new azines and hydrazones derivatives of formylated-triarylmethanes were obtained in good yields. The structures of all compounds were confirmed by elemental analysis, IR, H-1 NMR and C-13 NMR spectroscopy.
POLYCYCLIC AROMATIC COMPOUNDS
(2021)
Article
Chemistry, Organic
Divya Sree Uppalapati, Rama Sekhara Reddy Dachuru, Satya Veni Sunkara
Summary: The synthesis of naphtho[2,1-b]furan derivatives and functionalized pyrazole derivatives under solvent-free conditions using silica sulfuric acid as a catalyst has been developed, with significant advantages such as simple operation, shorter reaction times, and high yields of products.
JOURNAL OF HETEROCYCLIC CHEMISTRY
(2021)
Article
Materials Science, Paper & Wood
Yuan Zhong, Xueyi Gao, Wanqi Zhang, Xue Wang, Kebing Wang
Summary: In this study, cellulose nanocrystals were prepared from Salix psammophila and carboxyl functional groups were introduced by oxidation. Microscopy observation revealed that the nanocrystals exhibited short rod-like fibers. XPS analysis confirmed the presence of carboxyl groups in the nanocrystals.
Article
Chemistry, Physical
Yanping Ma, Wei li, Huimin Wang, Jianjun Chen, Junjie Wen, Siyuan Xu, Xiaoyan Tian, Lianyun Gao, Zhichao Hou, Qiulin Zhang, Hao Yang
Summary: CeO2-based catalysts have garnered attention in the selective catalytic reduction of NO with NH3, but their poor T-90 operation window hinders industrial application. A study introducing sulfuric acid treatment to FeOx-CeO2 mixed oxides for NH3-SCR showed significantly improved high temperature activity and broadened operation window, attributed to increased redox capacity and surface acidity. This enhancement in performance was associated with the synergistic effect of these two parameters, favoring the formation of active intermediate species for N2 generation and inhibiting the formation of N2O and NOx, resulting in high catalytic activity and N2 selectivity.
APPLIED CATALYSIS A-GENERAL
(2021)
Article
Chemistry, Multidisciplinary
Gang-Biao Li, Shao-Hong Cai, Bo Long
Summary: This study investigated a new route for the formation of organic nitrates in the reaction of formaldehyde (HCHO) with nitric acid (HNO3) catalyzed by different species. The results showed that dimethylamine has a stronger catalytic ability in reducing the energy barrier compared to water and ammonia. Additionally, the reaction of HCHO + HNO3 + (CH3)2NH was found to compete well with the naked HCHO + HNO3 reaction under certain atmospheric conditions.
Article
Chemistry, Analytical
Shinya Kishioka
Summary: The reactivity of electro-oxidation products of N-hydroxyphthalimide (NHPI) with 4-methoxybenzyl alcohol (MBA) was investigated in a sulfuric acid-acetonitrile mixed solution. Phthalimide N-oxyl radical (PINO.) formed by one-electron oxidation of NHPI reacted with MBA in both mixed solution and aprotic solvent. Complex-shaped voltamograms were observed for further oxidation products of PINO. reacting with MBA.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Masoud Mohammadi, Arash Ghorbani-Choghamarani
Summary: In this study, a novel amino acid-based Ni complex was immobilized on SiO2-modified Hercynite magnetic nanoparticles to prepare a highly active catalytic system for various reactions. The heterogenized catalyst showed excellent thermal stability and could be easily separated and reused due to its magnetic and heterogeneous nature.
RESEARCH ON CHEMICAL INTERMEDIATES
(2022)
Article
Chemistry, Organic
Arash Ghorbani-Choghamarani, Zahra Taherinia
Summary: This article discusses the application of greener methods in the synthesis of sulfoxides and the study on sulfinylation reaction methods. Various compounds have been synthesized through different pathways, providing new insights into the preparation of sulfoxides.
Article
Chemistry, Applied
Farhad Khanmohammadi-Sarabi, Arash Ghorbani-Choghamarani, Hamid Aghavandi, Mohammad Ali Zolfigol
Summary: In this research project, silica-modified ZnFe2O4 magnetic nanoparticles were prepared and immobilized with ascorbic acid to produce an efficient catalyst. The physical and chemical properties of the catalyst were analyzed, and its catalytic activity was tested for the synthesis of specific derivatives. The catalyst showed good recyclability.
APPLIED ORGANOMETALLIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Abbas Rezaei, Arash Ghorbani-Choghamarani, Bahman Tahmasbi
Summary: In this study, a novel nickel metal-organic framework (Ni-DAMP-MOF) was prepared using 4,6-diamino-2-mercaptopyrimidine as a chelating agent. The MOF showed high catalytic activity and selectivity in the synthesis of pyranopyrazoles and oxidation of sulfides.
Article
Energy & Fuels
Ali Naghipour, Arash Ghorbani-Choghamarani, Zahra Taherinia
Summary: In this study, a mesoporous heterogeneous nanocatalyst was successfully synthesized and applied in the esterification process for biodiesel production. The catalyst showed high activity and stability, making it suitable for rapid production of high-quality biodiesel.
Article
Chemistry, Multidisciplinary
Farhad Khanmohammadi-Sarabi, Arash Ghorbani-Choghamarani, Hamid Aghavandi, Mohammad Ali Zolfigol
Summary: In this study, a novel nanomagnetic solid catalyst, ZnFe2O4@SiO2@l-methionine-Zr, was synthesized, which contains zirconium catalytic sites on the surface of ZnFe2O4 MNPs. A new and efficient magnetic material was designed and prepared by immobilizing the l-methionine complex of zirconium on ZnFe2O4@SiO2 nanoparticles. The proposed catalyst was characterized and successfully applied in the synthesis of tetrazoles and polyhydroquinoline derivatives. The use of this heterogeneous nanocatalyst in the mentioned organic reactions offers good results, such as the use of commercially available chemicals, inexpensive starting materials, high reaction efficiencies, easy recovery, and reusability of the catalyst for at least five continuous cycles.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Organic
Hamid Aghavandi, Arash Ghorbani-Choghamarani, Masoud Mohammadi
Summary: In this work, a novel Praseodymium complex immobilized onto the SBA-15 channels was synthesized by a simple procedure. The designed catalyst showed excellent performance in the synthesis of bis(pyrazolyl)methane derivatives.
POLYCYCLIC AROMATIC COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Hamid Aghavandi, Arash Ghorbani-Choghamarani
Summary: In this work, a novel and green nanomagnetic solid acid catalyst, ZnFe2O4@SiO2-SO3H, was synthesized and identified. The catalyst contains sulfuric acid catalytic sites on the surface of ZnFe2O4 magnetic nanoparticles. The synthesized catalyst was accurately characterized by various physicochemical methods. It was found to have excellent catalytic activity for the synthesis of tetrahydrobenzo[b]pyran and DHQZ in ethanol solvent, with yields of 86-97%. The heterogeneous nature of the catalyst was confirmed and its recyclability was demonstrated with negligible loss of activity (97-92%). The amount of sulfamic acid in ZnFe2O4@SiO2-SO3H was determined through back titration.
RESEARCH ON CHEMICAL INTERMEDIATES
(2023)
Article
Chemistry, Multidisciplinary
Zahra Moradi, Arash Ghorbani-Choghamarani
Summary: This research project introduces the preparation of a new mesoporous silica compound (AGC-ZM-2022) using a fatty acid as a template. Palmitic acid, a commonly found saturated fatty acid in animals, plants, and microorganisms, was used as the template to design the mesoporous silica compound. AGC-ZM-2022 was synthesized through the sol-gel method, using tetraethylorthosilicate as the silica source and palmitic acid as the template instead of traditional templates. The physical properties and structure of AGC-ZM-2022 were characterized using various techniques such as FT-IR, SEM, XRD, TEM, and BET.
Article
Chemistry, Physical
Arash Ghorbani-Choghamarani, Zahra Taherinia
Summary: Metal sulfide is a compound semiconductor material that can exist in different forms of metallic ions. Layered transition metal sulfide, such as VS2 and VS4, has attracted significant interest due to its similarity to graphene and its diverse applications in fields including photoelectric devices, electro-catalysis, batteries, and energy storage. This study presents a practical synthetic method to form mesoporous vanadium sulfides with controlled morphologies by adjusting the molar ratio of vanadium acetylacetonate and L-cysteine using a one-step solvothermal method. The catalytic activity of these vanadium sulfides was investigated in several reactions, and their structural properties were characterized using various techniques.
MOLECULAR CATALYSIS
(2023)
Article
Chemistry, Multidisciplinary
Masoud Mohammadi, Arash Ghorbani-Choghamarani, Noorullah Hussain-Khil
Summary: In this study, a novel chelan complex - L-aspartic acid with copper (II) - is developed on the surface of silica-modified nanomagnetic zirconium ferrite as a new catalytic support. The resulting complex exhibits significant catalytic activity in the synthesis of Pyrano[2,3-c]pyrazoles and 2-amino-3-cyanopyridine derivatives. Mechanistic studies revealed a similar reaction sequence for both reactions, with an additional oxidation step for the synthesis of 2-amino-3-cyanopyridines to pyridines. Various aryl and hetero-aryl aldehydes were employed for the synthesis of six-membered heterocycles.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Multidisciplinary Sciences
Zahra Moradi, Arash Ghorbani-Choghamarani
Summary: In this study, a new type of magnetic mesoporous material (Fe3O4@SiO2@KIT-6@2-ATP@Cu-I) was designed and synthesized, and its application in the synthesis of amides and anilines was investigated. The structure of Fe3O4@SiO2@KIT-6@2-ATP@Cu-I was characterized and identified using various techniques. The synthesized catalyst can be easily removed from the reaction medium using an external magnet and can be reused multiple times.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Organic
Ali Reza Ataee-Najari, Mahmoud Zarei, Hossein Ahmadi, Mohammad Ali Zolfigol, Arash Ghorbani-Choghamarani, Mojtaba Hosseinifard
Summary: In this research, [Zr-UiO-66-CO2H]Br was introduced as a versatile heterogeneous acid catalyst for the ring-opening of epoxides. The study also discusses the appropriate method for designing an active and efficient Bronsted acid site in metal-organic frameworks. [Zr-UiO-66-CO2H]Br was successfully used for the preparation of a-aryloxy alcohols under mild and green conditions.
POLYCYCLIC AROMATIC COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Zeinab Shirvandi, Arash Ghorbani-Choghamarani, Amin Rostami
Summary: In this study, a new palladium nanocatalyst supported on l-threonine functionalized magnetic mesocellular silica foams was synthesized and characterized. The catalyst showed excellent catalytic activity for Stille, Suzuki, and Heck coupling reactions, and could be recovered and reused for at least five consecutive runs without losing activity by applying an external magnetic field.
Article
Chemistry, Multidisciplinary
Mitra Darabi, Mohsen Nikoorazm, Bahman Tahmasbi, Arash Ghorbani-Choghamarani
Summary: In this study, a novel and green heterogeneous catalyst KIT-6@SMTU@Ni was successfully synthesized via a new method of Ni(ii) complex stabilization on modified mesoporous KIT-6. The synthesized catalyst was characterized using various techniques. It was found to be efficient in the synthesis of 5-substituted 1H-tetrazoles and pyranopyrazoles, with high yields and reasonable reaction times. The catalyst also exhibited excellent reusability and had other advantages such as using green solvents and commercially available materials.
