Article
Chemistry, Inorganic & Nuclear
Saurabh Sharma, Udai P. P. Singh
Summary: A new hybrid catalyst has been synthesized by immobilizing copper(II) alpha-diimine complex on mesoporous silica. The catalyst shows high reactivity and stability in converting alkenes into epoxides, with trans stilbene achieving a maximum yield of 100%. It can be recycled and reused multiple times without significant loss of activity.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Beibei Gao, Jie Zhang, Min Zhang, Haisong Li, Jing-He Yang
Summary: In this study, PdCu supported on MCM-41 catalysts were used for the catalytic transfer hydrogenation of biomass-derived furfural to furfuryl alcohol. The PdCu/MCM-41 catalysts showed high catalytic performance with a furfural conversion of 97.4% and a furfuryl alcohol selectivity of 98.3%.
APPLIED SURFACE SCIENCE
(2023)
Review
Chemistry, Inorganic & Nuclear
Manfredi Caruso, Sergio Navalon, Massimo Cametti, Amarajothi Dhakshinamoorthy, Carlo Punta, Hermenegildo Garcia
Summary: This review summarizes the strategies for supporting or anchoring NHPI on insoluble solids, transforming it into a heterogeneous catalyst system, with advantages such as easy separation and recovery of the catalyst, recyclability, and the possibility of continuous flow reactions.
COORDINATION CHEMISTRY REVIEWS
(2023)
Article
Chemistry, Physical
Amr A. Ibrahim, Reda S. Salama, Sohier A. El-Hakam, Abdelrahman S. Khder, Awad I. Ahmed
Summary: Zirconia-based mesoporous MCM-41 loaded with varying amounts of sulfate were successfully prepared and characterized using various methods. The increase in sulfate content led to an increase in lattice cell parameter and the samples exhibited a large surface area with uniform pore diameter distribution. The materials showed good catalytic activity and high adsorption capacity for methylene blue.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Chemistry, Physical
Amr A. Ibrahim, Reda S. Salama, Sohier A. El-Hakam, Abdelrahman S. Khder, Awad Ahmed
Summary: The insertion of phosphotungstic acid (PTA) and zirconia (ZrO2) into mesoporous MCM-41 significantly improved the acidic strength and surface acidity of the composite material. After determining the optimal catalytic activity and surface acidity of 25.0 wt% PTA/Zr-MCM-41, adsorption experiments revealed that this composite has high adsorption capacity for Methylene Blue (MB).
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Green & Sustainable Science & Technology
Shivali Arora, Vijayalakshmi Gosu, U. K. Arun Kumar, Verraboina Subbaramaiah
Summary: The present study investigated the catalytic activity of heterogeneous catalyst for transesterification of glycerol into glycerol carbonate. The study found that lithium impregnated on MCM-41 framework showed better catalytic activity, leading to an increase in the average pore diameter. The optimal conditions for glycerol carbonate yield were determined as 5% Li impregnation, calcination at 450°C, reaction temperature of 90°C for 3 hours, achieving a 93.14% yield.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Chemistry, Inorganic & Nuclear
Rebecca Schneider, Tobias A. Engesser, Jessica N. Hamann, Christian Nather, Felix Tuczek
Summary: In this study, four structurally related bis-tridentate N-donor ligands with different functionalities were synthesized to form corresponding dicopper(I) complexes as catalysts for the conversion of 2,4-di-tert-butylphenol. The results showed evidence of a mu-eta(2):eta(2)-peroxo-dicopper(II) species and catalytic conversion in the imine ligand systems but not in the amine ligand systems.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Mickael Henrion, Yorck Mohr, Kwinten Janssens, Simon Smolders, Aram L. Bugaev, Oleg A. Usoltsev, Elsje Alessandra Quadrelli, Florian M. Wisser, Dirk E. De Vos, Jerome Canivet
Summary: New catechol-based porous polymers were synthesized and used as platforms for the heterogenization of molecular Cu complexes. The resulting Cu@CatMP-1 materials proved to be highly stable and performing catalysts with turnover numbers up to 6000, about 1 to 2 orders of magnitude higher than the current relevant state of the art. The solid catalyst showed recyclability for over 10 runs without metal leaching and has been scaled to the gram scale. The coordination of Cu to catechol within the polymer has been confirmed by X-ray absorption spectroscopy.
Article
Chemistry, Physical
Ruixue Zhang, Yan Chen, Muhua Ding, Jie Zhao
Summary: This review provides a comprehensive summary of seminal heterogenized Cu-catalyzed homogenous catalysis reported over the last decade, highlighting the potential and synthetic perspectives of heterogeneous copper catalysis in both academic and industry.
Article
Chemistry, Physical
Jiaqi Li, Anusheela Das, Qing Ma, Michael J. Bedzyk, Yosi Kratish, Tobin J. Marks
Summary: With the increasing importance of renewable resources, chemical research is focusing on substituting petrochemicals with biomass-derived analogues. In order to achieve this, understanding the mechanisms behind catalytic systems is crucial for rational design. This study discusses the structure and reactivity of a carbon-supported molybdenum-dioxo catalyst (AC/MoO2) and its role in alcohol dehydration, providing valuable insights for future biomass processes.
Article
Chemistry, Inorganic & Nuclear
Tianye Gao, Lizhen Meng, Guang Zeng, Zhiqiang Hao, Zhangang Han, Qi Feng, Jin Lin
Summary: In this study, four dual-ligand coordinated copper complexes were successfully synthesized by reacting with different ligands, providing new options for catalyst research. These complexes exhibited high catalytic activity and good selectivity for the oxidation of primary and secondary alcohols.
Article
Biotechnology & Applied Microbiology
Jeyashelly Andas, Siti Hajar Ekhbal, Tammar Hussein Ali
Summary: This study successfully prepared MCM-41 and modified MCM-41 from silica extracted from rice husk ash, and characterized the materials through various analytical techniques. Ni-MCM-41 showed higher catalytic activity with benzaldehyde as the sole product, while MCM-41 produced benzaldehyde and styrene oxide.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Chemistry, Multidisciplinary
Yu Lin Hu, Qi Rong, Chen Chen, Xiao Bing Liu
Summary: A type of Al-MCM-41 supported dual imidazolium ionic liquids nanocomposites have been synthesized and efficiently used as catalysts in the one-pot synthesis of 2,3-dihydroquinazolin-4(1H)-ones. The highest efficiency was achieved in the condensation of aldehydes and anthranilamide using the (2)Al-MCM41@ILCeCl4(0.5) solid catalyst under mild conditions. The reaction follows a heterogeneous pathway and the catalyst shows stability, high activity, robustness, and good recyclability.
JOURNAL OF SAUDI CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Ningbo Gao, Kailun Chen, Cui Quan, Shixi Wu
Summary: A novel NMC catalyst was developed for steam reforming of real tar, showing excellent catalytic performance under optimal conditions. The catalyst exhibited high tar conversion and H-2 yield, along with good resistance to carbon formation and stability. Overall, the utilization of NMC catalysts for tar steam reforming is promising.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Kuan Wang, Heng Yang, Zhe Cao, Hui Ma, Zhen-Hong He, Jian-Gang Chen, Huan Wang, Weitao Wang, Jian Lu, Zhao-Tie Liu
Summary: The development of solid acidic catalyst is crucial for the nitration of aromatics in a safe, controllable, efficient, and environment-friendly manner. In this study, trimetallic supported catalysts were prepared using the equivalent-volumetic impregnation method, and the Ce4Cu6Co0.5Ox/MCM-41 catalyst showed excellent catalytic performance for the nitration of acetanilide. The catalyst exhibited high conversion of acetanilide with selectivity to mono-nitroacetanilide, and it also demonstrated stability and reusability, making it a potential replacement for concentrated acid nitration systems in the chemical industry.
MOLECULAR CATALYSIS
(2023)
Article
Chemistry, Organic
Fuying Zhu, Yamei Lin
Summary: In this study, a low-metal iron-supported catalyst (Fe20/NC-Mg) was reported for the efficient synthesis of quinoxaline compounds, using water as a solvent and without additional bases. The synergistic effect of FeNx site and Mg (OH)2 nanorods in the catalyst played a key role in achieving high yields (82-91%) in 16 examples. The gram-level synthesis and reusability of the catalysts after four cycles demonstrated its industrial application potential.
Article
Chemistry, Organic
Mikhail Kozlov, Alexey Tyurin, Andrey Dmitrenok, Vyacheslav Rusak, Aleksander Fedorov, Igor Zavarzin, Yulia Volkova
Summary: This study presents a novel and practical synthesis method for phosphorus-substituted 1,3,4-thiadiazolines using phosphorylthioformic acid hydrazides and ketones. The protocol demonstrates operational simplicity, availability of reagents, and tolerance towards different functional groups.
Article
Chemistry, Organic
Jisna Jose, Thomas Mathew
Summary: 2-Cyclopentenone and its derivatives are highly esteemed synthetic intermediates with exceptional utility in organic synthesis. They are favored structural motifs in numerous pharmaceutical drugs and natural products, highlighting their significance. The review discusses the various methods used to synthesize cyclopentenones from 2016 to 2023.
