Article
Chemistry, Multidisciplinary
Francesco Ferlin, Ioannis Anastasiou, Nihad Salameh, Takeru Miyakoshi, Olivier Baudoin, Luigi Vaccaro
Summary: A heterogeneous catalyst has been prepared for the intramolecular activation/cyclization reaction to synthesize indolines. The catalyst showed high efficiency through a release and catch mechanism, facilitated by iodide ligands. The heterogeneous nature of the catalyst was further utilized in the design of a continuous-flow protocol, enabling efficient recovery and reuse.
Article
Energy & Fuels
Wenkai Zhang, Ze Wang, Tengze Ge, Wenli Song, Songgeng Li
Summary: This study investigated the migration of chlorine in the pyrolysis process and identified two optimal catalysts for dechlorination of bio-oil. The results suggested that a low temperature is preferable for obtaining bio-oil with low chlorine content.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Chemistry, Multidisciplinary
Jiang-Fei Li, Yu-Xin Luan, Mengchun Ye
Summary: Anchoring catalysis involves a reversible interaction between substrates and catalysts to activate inert chemical bonds without the need for preinstalled directing groups. Coordinative bimetallic anchoring catalysis, in particular, displays superior reactivity due to strong interaction and good compatibility with substrates and reaction conditions. Major progress has been made in recent years in the development of coordinative bimetallic anchoring catalysis.
SCIENCE CHINA-CHEMISTRY
(2021)
Article
Chemistry, Physical
Luca Deiana, Elham Badali, Abdolrahim A. Rafi, Cheuk-Wai Tai, Jan-E Backvall, Armando Cordova
Summary: This article describes efficient nanogold-catalyzed cycloisomerization reactions of alkynoic acids and allenynamides, resulting in the formation of enol lactones and dihydropyrroles, respectively. The gold nanoparticles were immobilized on thiol-functionalized microcrystalline cellulose and exhibited robust catalytic activity for multiple cycles.
Article
Chemistry, Multidisciplinary
Ravi Yadav, Paul Janssen, Marcel Schorpp, Lutz Greb
Summary: Anti-van't Hoff-Le Bel configured p-blockelementspecies possess intrinsically high reactivity and are thus challenging to isolate. Consequently, numerous elements in this configuration, including square-planar germanium(IV), remain unexplored. Herein, we follow a concept to reach anti-van't Hoff-Le Bel reactivity by ligand dissociation from a rigid calix[4]pyrrole germanein its bis(thf) adduct. While the macrocyclic ligand assures square-planar coordination in the uncomplexed form, the labile thf donors provide robustness for isolation on a multigram scale. Unique properties of a low-lying acceptor orbital imparted to germanium(IV) can be verified, e.g., by isolating an elusive anionic hydrido germanate and exploiting it for challenging bond activations. Aldehydes, water, alcohol, and a CN triple bond are activated for the first time by germanium-ligand cooperativity. Unexpected behaviors against fluoride ion donors disclose critical interferences of a putative redox-coupled fluoride ion transfer during the experimental determination of Lewis acidity. Overall, we showcase how ligand lability grants access to the uncharted chemistry of anti-van't Hoff-Le Bel germanium(IV) and line up this element as a member in the emerging class of structurally constrained p-block elements.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Applied
Amarajothi Dhakshinamoorthy, Cristina Valles Garcia, Patricia Concepcion, Hermenegildo Garcia
Summary: In this study, Cu-3(BTC)(BTC: 1,3,5-benzenetricarboxylate) MOF is reported to be an effective catalyst for promoting the borylation of arenes through C-H activation. Compared to other MOFs, Cu-3(BTC) shows higher catalytic activity, with copper ions playing a crucial role in the catalytic mechanism.
Review
Chemistry, Physical
Ubong J. Etim, Peng Bai, Oz M. Gazit, Ziyi Zhong
Summary: This article discusses the importance of oxidation reactions in the origin of life and industrial applications. The development of green catalysis enables catalytic reactions to be conducted at mild conditions. Activating oxygen molecules under mild conditions remains a major challenge in catalytic oxidation reactions.
CATALYSIS REVIEWS-SCIENCE AND ENGINEERING
(2023)
Article
Chemistry, Inorganic & Nuclear
Andrew T. Henry, Taylor P. L. Cosby, Paul D. Boyle, Kim M. Baines
Summary: This study reports the synthesis of various bis(catecholato)germanes and their application in catalysis. The Lewis acidity of these compounds was evaluated using experimental and computational methods, and the addition of donor additives in the dimerization reaction showed comparable selectivity control to transition metal catalyst systems.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Inorganic & Nuclear
Ding-Nan Shih, Ramalingam Boobalan, Yi-Hung Liu, Rong-Jie Chein, Ching-Wen Chiu
Summary: In recent years, a tricoordinate borenium ion has been studied for its applications in Lewis acid catalysis, as well as in the development of asymmetric catalysis mediated by a chiral borenium ion. Chloroborane masked borenium ions have been prepared to stabilize the electron-deficient boron atom and utilized as catalysts for enantioselective Diels-Alder cycloaddition reactions. Additionally, the stereoselectivity of the cycloaddition can be controlled and improved by the coordination of SnCl4 at the bridging chloride of the borenium ion.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Physical
Nihad Salameh, Ioannis Anastasiou, Francesco Ferlin, Francesco Minio, Shaomin Chen, Stefano Santoro, Ping Liu, Yanglong Gu, Luigi Vaccaro
Summary: This study presents a waste-minimized protocol for the synthesis of oxindoles using cyclopentyl methyl ether as the reaction medium and palladium on carbon as the reusable catalyst. The protocol demonstrates high efficiency, minimal metal contamination, and minimal waste production. The catalyst can be recovered and reused without any apparent loss of efficiency. The products can be isolated by simple precipitation and both the reaction medium and solvent can be recovered.
MOLECULAR CATALYSIS
(2022)
Article
Chemistry, Physical
Itsuki Nohira, Naoto Chatani
Summary: In this study, a Ni-catalyzed cross-electrophile coupling between C(sp(2))-F bonds in ortho-fluoro-substituted aromatic amides and C(sp(2))-Cl bonds in aryl chlorides was reported. The reaction, using Zn as a reductant and (LiOBu)-Bu-t as a base, with LiCl and ZnCl2 as additives, displayed excellent functional group tolerance and a broad substrate scope. Furthermore, the reaction was also applicable to cross-electrophile coupling between C(sp(2))-F and C(sp(2))-O bonds in an aryl tosylate and a triflate derivative.
Article
Chemistry, Multidisciplinary
Rui Yan, Hang Yu, Zhong-Xia Wang
Summary: The study found that [Cp*Co(CO)I-2] effectively catalyzes the pyridyl-directed C-H allylation of arenes with allylic amines in the presence of AgOAc and CF3COOAg, resulting in moderate to high yields under appropriate conditions. The reaction shows good tolerance towards a variety of functional groups and has certain universality for catalyzing the arylation of C-H bonds.
CHINESE JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Physical
Nahiane Pipaon Fernandez, Gregory Gaube, Kyla J. Woelk, Mathias Burns, Damian P. Hruszkewycz, David C. Leitch
Summary: We present a new method for direct C-C bond formation using tandem C-O/C-H activation mediated by palladium catalyst. This approach allows for base-free direct C-H alkenylation by combining C-O oxidative addition at enol pivalates and concerted metalation-deprotonation of functionalized heterocycles. Mechanistic studies show that C-O oxidative addition is reversible and C-H activation occurs directly from the Pd(II) C-O oxidative addition product. In situ P-31 NMR spectroscopy reveals that (Cy3P)(2)Pd-(alkenyl)(OPiv) species is the predominant catalyst resting state during the reactions.
Article
Chemistry, Organic
Jan Ulc, Jaroslav Jacko, Ivana Cisarova, Lubomir Pospisil, David Necas, Martin Kotora
Summary: Here, the design and synthesis of a series of novel cationic nitrogen-embedded polyaromatic hydrocarbons with a planar geometry are reported. The synthesis pathway is based on catalytic C-C/C-H bond activation relay, enabling the preparation of selectively-regioselective 5,6,10,11-tetrasubstituted naphtho[2,1,8-ija]quinolizinium salts with various substituents. Single-crystal X-ray analysis confirmed the planarity of the quinolizinium core. Most of the synthesized compounds exhibited strong fluorescence, ranging from 420-600 nm, depending on the substitution pattern. DFT calculations revealed that the LUMO is always distributed over the quinolizinium framework while the delocalization of HOMO is related to the substitution pattern. Electrochemical measurements showed irreversible reduction of all compounds, which is consistent with the calculated location of LUMO orbitals.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Han Yan, Xuetao Qin, Jin-Cheng Liu, Lihua Cai, Peng Xu, Jian-Jun Song, Chao Ma, Wei-Wei Wang, Zhao Jin, Chun-Jiang Jia
Summary: This study reports a photochemical strategy for the fabrication of promoted Pt-CeO2 catalysts through UV-induced deep dechlorination and surface oxygen activation. The strategy shows universality for catalyst synthesis with different metals, supports, and reactions, providing a new approach for the synthesis of robust catalysts.
JOURNAL OF CATALYSIS
(2022)
Article
Chemistry, Inorganic & Nuclear
Guojun Hu, Ziyue Deng, Yanwei Wang, Dan Yuan, Yong Zhang, Yingming Yao
Summary: A series of rare-earth metal complexes were synthesized and used as efficient initiators for the polymerization of trimethylene carbonate (TMC) and (L)-lactide ((L)-LA).
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Van Ha Nguyen, John H. K. Yip
Summary: In this study, eight PtII-azulene complexes were synthesized to investigate the effect of metalation on the electronic structures, spectroscopy, and luminescence of organic chromophores. The results showed that the attachment of Pt substituents to azulene affected the HOMOs, LUMOs, and luminescence properties. The study provides insights into the role of metalation in modifying the properties of organic chromophores.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Moon Kedia, Virender Singh, Bhaskaran Shankar, Malaichamy Sathiyendiran
Summary: This study synthesized two types of neutral binuclear metallocycles using a one-pot solvothermal method and characterized their structures. The analysis revealed that these complexes adopt a binuclear heteroleptic cyclic architecture and belong to phosphine oxide donor (P=O)-based supramolecular coordination cyclic complexes.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Radhey S. Srivastava
Summary: This study demonstrates the effectiveness of zero-valent elements as reductants for the deoxydehydration reaction of polyols catalyzed by ONO-pincer ligated molybdenum dioxo. The insolubility and easy separability of the reductants and their oxidized products during the reaction are emphasized. Additionally, the choice of ligand has an impact on the catalytic performance of the reaction.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Hao Zhou, Yajun Sun, Li Deng, Weiran Yang, Yuehui Li
Summary: Efficient Ru-catalyzed hydrogenation of aldehydes was achieved using carbazole-derived phosphine ligands, with the crucial role of N-H moiety in promoting the catalytic reaction. The method was successfully applied in the Co/Ru-catalyzed hydroformylation process, resulting in the production of long-chain alcohols with excellent yields.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Theodor Danescu, Alexandru Lupan, Radu Silaghi-Dumitrescu, R. Bruce King
Summary: The structures and energies of complexes containing (Me2C2N2P)2Ru2(CO)n and (Me2C2N2P)2Fe2(CO)n have been studied. Low-energy structures are characterized by the presence of bridging diazaphospholyl rings, while higher-energy structures involve different ligand structures.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Savannah C. Kapper, Aamani Ponnekanti, Jonas Schaab, Tian-yi Li, Christine L. Chung, Gael Ung, Peter I. Djurovich, Mark E. Thompson
Summary: Organometallic iridium complexes with two cyclometalated ligands and one bis-oxazoline derived ancillary ligand were studied. These complexes have emission spanning across the visible and near-ultraviolet region, with moderate to high photoluminescence quantum yields. The (ppy)2Ir(BOX-CN) complexes were resolved into Delta- and Lambda-diastereomers based on solubility differences.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Zahra Karimi Sangari, Hossein Naeimi
Summary: In this research, a nanostructured CoCuFe2O4 catalyst was prepared using a brief and useful synthetic strategy. This catalyst was used for synthesizing 1,2,4,5-tetrasubstituted imidazole derivatives under ultrasonic irradiation. The approach offers advantages such as high efficiency, short reaction times, simplicity of the reaction medium, accelerated reaction rates, and easier separation and purification of products.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Rukhsana Gul, Wajid Munir, Ebraheem Abdu Musad Saleh, Shaukat Shujah, Muhammad Sirajuddin, Saira Tabassum, Khalil Ur Rehman, Dilfaraz Khan, Sameerah I. Al-Saeedi, Ehab A. Abdelrahman
Summary: Two new Schiff base ligands were synthesized and used to form copper, nickel, and cobalt complexes. The synthesized compounds were characterized and screened for various biological activities. The metal complexes showed better activities in antibacterial, antifungal, antidiabetic, and antioxidant assays.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Review
Chemistry, Inorganic & Nuclear
Ahsan Nazir, Pengwei Huo, Ameena Tur Rasool
Summary: This review explores the potential of g-C3N4-based S-scheme heterojunctions in addressing environmental issues. It summarizes the mechanism and preparation techniques of S-scheme heterojunctions based on g-C3N4, and presents recent studies on their applications in pollutant removal, CO2 reduction, hydrogen production, and bacterial disinfection. The review concludes with an outlook on future challenges for g-C3N4-based S-scheme heterojunctions.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Francois Mazars, Koffi Senam Etse, Guillermo Zaragoza, Lionel Delaude
Summary: The activity of three Pd-PEPPSI catalyst precursors with N-heterocyclic carbene (NHC) ligands derived from caffeine and theophylline in Mizoroki-Heck reactions was tested. The results showed that the catalysts achieved high conversions and yields, especially in the presence of electron-withdrawing substituents.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Bo-Han Wu, Xue Zhou, Lin Liu, Zheng-Bo Han
Summary: Researching carbon dioxide removal from flue gas and natural gas is crucial. Metal-organic frameworks (MOFs) are commonly used in adsorption due to their high surface area, porosity, and chemical properties. An ultra-microporous MOF CPM-20(Co) with mixed ligand was synthesized using inexpensive ligands. The material exhibited high selectivities and low regenerative energy, making it a promising option for CO2 separation in industries.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)