Article
Energy & Fuels
Bishwajit Changmai, Andrew E. H. Wheatley, Ruma Rano, Gopinath Halder, Manickam Selvaraj, Umer Rashid, Samuel Lalthazuala Rokhum
Summary: A robust and magnetically recoverable Fe3O4@SiO2-SO3H core@shell nanoparticulate acid catalyst was successfully synthesized for the transesterification and esterification of triglycerides and free fatty acids. The catalyst showed high conversion rate, low activation energy, excellent chemical and thermal stability, and reusability. The study demonstrated the potential of the catalyst for biodiesel production.
Article
Biochemistry & Molecular Biology
Iman Sedighimehr, Bahador Karami, Mahnaz Farahi, Mosadegh Keshavarz
Summary: This research reports the synthesis of novel indeno[1,2-b]pyrano[2,3-f]chromene-2,12(13H)-dione derivatives in the presence of a newly introduced magnetically recoverable nanosolid acid catalyst. The prepared Fe3O4@SiO2-(CH2)(3)OPO3H2 nanocatalyst exhibited good catalytic activity for the synthesis of the derivatives. The nanocatalyst also showed great catalytic stability up to five consecutive runs.
MOLECULAR DIVERSITY
(2022)
Article
Chemistry, Multidisciplinary
Jinghan Wang, Jaehyun Kim, Jeewon Bu, Dokyoon Kim, Soo Young Kim, Ki Tae Nam, Rajender S. Varma, Ho Won Jang, Rafael Luque, Mohammadreza Shokouhimehr
Summary: Nickel Prussian blue nanoparticles were used to form NiFe2O4 nanocatalysts supported on 2D molybdenum disulfide through heat treatment. The resulting nanocomposite catalyst exhibited excellent catalytic activity and high yields in the reduction of nitrobenzene in water, and showed long-term cycle stability due to multiple electron transfer pathways and strong magnetic characteristics.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Mintu Maan Dutta, Prodeep Phukan
Summary: A magnetically recoverable gold nanocatalyst was synthesized, supported on cobalt ferrite nanoparticles, showing excellent catalytic activity for the hydration of alkynes. The nanocomposite, with Au nanoparticles loaded on thiol-functionalized magnetic core, could generate corresponding ketones from alkyl and aryl alkynes under microwave irradiation with 2 wt% material. The catalyst could be easily recovered using an external magnet and reused without significant activity loss.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Md. Lutfor Rahman, Mohd Sani Sarjadi, Mohammed Salim Akhter, J. John Hannan, M. Shaheen Sarkar
Summary: A silica-coated magnetically separable Schiff-base palladium nanocatalyst was developed and successfully applied in the Suzuki-Miyaura reaction with excellent recyclability.
ARABIAN JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Applied
Fereshte Hassanzadeh-Afruzi, Haniyeh Dogari, Farhad Esmailzadeh, Ali Maleki
Summary: An efficient magnetic polymer-based nanomaterial was successfully prepared and utilized as a heterogeneous catalyst for the synthesis of biologically active compounds in two multicomponent reactions (MCRs), achieving high yields and recyclable usage.
APPLIED ORGANOMETALLIC CHEMISTRY
(2021)
Article
Chemistry, Organic
Neha Choudhary, Shaikh M. Mobin
Summary: A bimetallic CuNi-12 nanocatalyst was synthesized and used for the efficient and selective hydrogenation of biomass-derived aldehydes and ketones. The synergistic effect between copper and nickel enhanced the catalytic activity and selectivity. The CuNi-12 nanocatalyst showed high conversion and selectivity for various aldehydes and ketones, and it was also reusable, magnetically separable, and recyclable.
ASIAN JOURNAL OF ORGANIC CHEMISTRY
(2023)
Letter
Chemistry, Multidisciplinary
Ali Maleki, Zoleikha Hajizadeh, Kobra Valadi
Summary: The synthesis and characterization of mica/Fe3O4 nanocomposite have been successfully achieved, showing environmentally friendly, low cost, and non-toxic properties. This nanocomposite serves as an efficient heterogeneous nanocatalyst in the synthesis of organic pharmaceutical compounds, with the advantage of easy separation with an external magnet and multiple reuse cycles.
GREEN CHEMISTRY LETTERS AND REVIEWS
(2021)
Article
Chemistry, Multidisciplinary
Manavi Yadav, Anju Srivastava, Rashmi Gaur, Radhika Gupta, Gunjan Arora, Rakesh Kumar Sharma
Summary: A highly efficient magnetically separable copper nanocatalyst has been developed for decarboxylative cross-coupling reaction. It is the first successful copper based heterogeneous system for this type of coupling, providing a low-cost, stable, and environmentally friendly solution that can be re-used for seven consecutive runs without significant loss in catalytic performance.
FRONTIERS IN CHEMISTRY
(2022)
Article
Chemistry, Analytical
Fuxing Zhu, Zhanshan Ma, Kehui Qiu, Weixing Peng
Summary: The separation of ilmenite from VTM ore was studied using magnetic separation and flotation technologies. A concentrate with a TiO2 grade of 9.90% was obtained through weak magnetic separation and coarse particle tailing dumping. The grade was then increased to 14.32% through strong magnetic separation and floating separation of sulfur minerals. Finally, a TiO2 grade of 46.34% was achieved through closed-circuit flotation using mixed MOH/PG-1 collectors.
Article
Chemistry, Multidisciplinary
Xiaoyu Zhang, Xiaoyan He, Sanhu Zhao
Summary: Magnetic nano catalysts modified by DBU showed excellent catalytic performance in the Knoevenagel reaction, improving reaction rate and yield. Notably, the catalyst can be easily separated from the reaction mixture through external magnetic force and recycled for 10 cycles without loss of catalytic activity.
GREEN CHEMISTRY LETTERS AND REVIEWS
(2021)
Article
Chemistry, Physical
Yafei Xu, Jun Wang, Rui Xu, Wuke Li
Summary: The smart catalyst shows temperature-controlled catalytic activity in releasing hydrogen from ammonia borane, with high catalytic activity at room temperature and significantly suppressed hydrogen generation at high temperature. The switchable red luminescence of the composite hydrogel in solution at high/low temperatures offers the possibility to track the catalyst and understand the catalytic mechanism. This thermo-controllable system of hydrogen generation has great potential applications in the safe hydrolysis from chemical hydride fuel.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Multidisciplinary
James P. Horwath, Peter W. Voorhees, Eric A. Stach
Summary: Supported metal nanoparticles play a crucial role in determining the activity and lifetime of heterogeneous catalysts. By combining in situ transmission electron microscopy with unsupervised machine learning, researchers can quantitatively analyze the destabilization process of these nanoparticles in real-time and develop predictive models for their evolution in reactive environments.
Article
Multidisciplinary Sciences
Dina Mallah, Bi Bi Fatemeh Mirjalili, Abdolhamid Bamoniri
Summary: The study focuses on the preparation of magnetite biopolymer-based BrOnsted base nano-catalyst using a nano-almond shell. The prepared nano-catalyst showed excellent efficiency in the synthesis of dihydropyrano[3,2-c]chromene and tetrahydrobenzo[b]pyran. Various characterization techniques were employed to analyze the structure and morphology of the nano-catalyst.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Physical
Manish Rawat, Toshiaki Taniike, Diwan S. Rawat
Summary: A facile method for preparing a magnetically separable nanocatalyst and its high catalytic efficiency in a specific synthesis reaction is reported. The nanocatalyst can be easily recovered using an external magnet and can be reused multiple times without significant loss in its catalytic activity and structural integrity. This method offers advantages such as high yield, short reaction time, and absence of additives or bases, and exhibits favorable green chemistry metrics.
Article
Chemistry, Organic
Dilek Isik Tasgin, Irem Bayraktar
Summary: We present a synthetic method for pyrrolizine-3-one derivatives and investigate their photophysical properties. These compounds are prepared through a series of reactions involving substituted pyrroles in one-pot, two-step oxidation, and intramolecular cyclization processes. The photophysical properties of the synthesized compounds are studied using UV-Vis and fluorescence spectroscopy in various solvents. The introduction of pyrrolyl substituents has a significant impact on Stokes shifts and quantum yield values.
SYNTHETIC COMMUNICATIONS
(2024)
Article
Chemistry, Organic
Satish Kumar Burra, Vaikunta Rao Lakinani, Raghunadh Akula, Chiranjeevi Yankkanti
Summary: A novel and green strategy for the construction of biologically relevant substituted indolyl-4H-chromenes scaffolds is reported, using L-proline as a catalyst and water as a promoter solvent. This catalytic system offers wider applicability, shorter reaction times, and high yields, making it an ideal condition for green chemistry.
SYNTHETIC COMMUNICATIONS
(2024)
Review
Chemistry, Organic
Abouelhaoul El Alami, Amine El Maraghi, Fatima Youssoufi, Assiya Atif, Hamid Sdassi
Summary: Nitrobenzimidazoles have become increasingly important in the design of new compounds in medicinal, therapeutic and chemical fields. This review provides an overview of the synthesis strategies and biological activities of nitrobenzimidazole derivatives.
SYNTHETIC COMMUNICATIONS
(2024)
Article
Chemistry, Organic
Nilesh Raghunath Khedkar, Alex Joseph, Milind Sindkhedkar
Summary: In this study, a new library of 3-(2-(pyrimidin-5-yl)thiazol-4-yl)-1,2,4-oxadiazole compounds was designed and synthesized as potential anticancer agents using in silico fragment-based drug design. The compounds were tested for their anticancer activity in vitro, and one compound exhibited excellent activity against multiple cancer cell lines.
SYNTHETIC COMMUNICATIONS
(2024)
Article
Chemistry, Organic
Terungwa H. Iorkula, Bryce A. Tolman, Scott R. Burt, Matt A. Peterson
Summary: A new method for synthesizing C-6 substituted products has been discovered in this study, which utilizes lower doses of fluoride and CsF as a catalyst, with high reaction yields and cost-effectiveness under suitable conditions.
SYNTHETIC COMMUNICATIONS
(2024)
Review
Chemistry, Organic
Ranjana Aggarwal, Swati Sharma
Summary: This review article mainly focuses on the synthesis of 3(5)-trifluoromethylpyrazoles via condensation reaction of trifluoromethyl-beta-diketones with hydrazines. It emphasizes the importance of fluorine-containing compounds and pyrazoles in the field of biology. The literature reported condensation reactions of trifluoromethyl-beta-diketones with hydrazines are covered.
SYNTHETIC COMMUNICATIONS
(2024)
Article
Chemistry, Organic
F. M. Alshareef, Sami A. Al-Harbi, Esam S. Allehyani, Omeima Abdullah, Magdy A. Ibrahim
Summary: This study aimed to construct a novel category of linear annulated chromeno[3',2':5,6]pyrido[2,3-d][1,3]thiazolo[3,2-a]pyrimidines. The chemical reactivity of the synthesized compounds was investigated, and they showed significant antimicrobial activity against various strains.
SYNTHETIC COMMUNICATIONS
(2024)
Article
Chemistry, Organic
Preethi Dhanapal, S. L. Manju
Summary: Thiazole based Schiff base scaffolds have become an integral part of drug development in recent years, playing a versatile role as building blocks for lead drug molecules. This study presents a facile one pot synthetic method for producing novel 4-aryl thiazoles with high yield, shorter reaction time, and milder conditions, without the need for catalysts or purification techniques.
SYNTHETIC COMMUNICATIONS
(2024)