Article
Chemistry, Physical
Fabian Fischer, Michael Eder, Marko Hapke
Summary: In this paper, novel stable CpCo(III) complexes were synthesized and evaluated for their application in catalytic [2+2+2] cycloadditions. The research demonstrated that CpCo(III) complexes can be directly applied as catalysts in catalytic cyclotrimerizations of triynes without reducing agents as additives.
Article
Chemistry, Inorganic & Nuclear
Chenghuan Liu, Rui Liu, Chenfeng Wang, Yanyan Tang, Zheng-Feng Zhang, Ming-Der Su, Yan Li
Summary: The reactions of amidinate silylene chloride with TMS- and Ph-ethynyl lithium salts lead to the formation of different silacycles, indicating the involvement of cyclo-condensations of transient ethynylsilylene intermediates and the activation of an amidinate backbone. The structures of the silacycles are influenced by the electronic and steric properties of the ethynyl substituents.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Chenghuan Liu, Rui Liu, Chenfeng Wang, Yanyan Tang, Zheng-Feng Zhang, Ming-Der Su, Yan Li
Summary: This study investigated the reactions of amidinate silylene chloride with TMS- and Ph-ethynyl lithium salts, resulting in the formation of silacycles. The different structures of the products were attributed to the electronic or steric properties of the ethynyl substituents, and the formation mechanisms were analyzed using DFT calculations. Additionally, sequential reactions and reactions under O2 led to the exclusive formation of ethynylsilanes, indicating a prevention of further conversion of ethynylsilylenes to silacycles.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Weijie Zhu, Fen Yao, Qiongfei Wu, Qiu Jiang, Jinxian Wang, Zhoucheng Wang, Hanfeng Liang
Summary: Researchers have developed a Ru/beta-Co(OH)(2) heterostructure catalyst that shows high activity, selectivity, and stability in electrocatalytic nitrate reduction reaction. The catalyst efficiently converts nitrate pollutants into valuable ammonia products.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Polymer Science
Nana Kikuta, Takahiro Shindo, Yu-ki Sugiyama, Takeshi Yamada, Sentaro Okamoto
Summary: The novel synthetic method for hyperbranched polymers utilizes a cobalt catalyst to promote the successful polymerization of aromatic diynes with internal alkynes, resulting in soluble polymers without the production of insoluble materials. The resulting polymer's molecular weight and degree of branching can be controlled by selecting the internal alkyne monomer and adjusting its loading amount.
Article
Chemistry, Physical
Jin Chen, Xuelong Lv, Wenjian Xu, Xiaolan Li, Jing Chen, Hongpeng Jia
Summary: This research discovered that using chlorine coordination can restore deactivated bimetallic catalysts and achieve widespread application in environmental catalysis. This method improves the activity and stability of the catalyst through homogeneous alloying.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Applied
Bita Manavi, Hossein Zahedian Tejeneki, Frank Rominger, Mahsa Armaghan, Walter Frank, Hamid Reza Bijanzadeh, Saeed Balalaie
Summary: This report discusses two distinctive intramolecular cyclizations of o-propargyloxy diketopiperazines achieved via a copper(I)-catalyzed reaction, offering an opportunity for the synthesis of challenging Diazabicyclics and Spiro-Diketopiperazinochromanes with high yields and exclusive diastereoselectivity.
ADVANCED SYNTHESIS & CATALYSIS
(2021)
Article
Chemistry, Physical
Samuel I. Jacob, Arunavo Chakraborty, Ali Chamas, Richard Bock, Lior Sepunaru, Gabriel Menard
Summary: The storage of renewable energy in ammonia (NH3) is considered as a viable alternative to hydrogen (H2) in the transition from fossil fuels. Solid oxide fuel cells (SOFCs) are the leading technology for direct ammonia fuel cells (DAFCs), but their high temperature operation is not suitable for light-duty vehicles. Aqueous-fed DAFCs have gained interest, but there is a lack of reported molecular catalysts to address challenges in reaction selectivity, catalyst loading, and stability. This study presents the use of a known complex, [Ru(bipyridinedicarboxylate)(4-methylpyridine)(2)] (RuBda, 1), to efficiently electrocatalyze the oxidation of aqueous NH3 to N2, with high faradaic efficiencies (>80%), unprecedented rates, and high turnover. Kinetic analyses suggest a unimolecular mechanism, making this catalyst highly applicable for commercially viable fuel cells.
ACS ENERGY LETTERS
(2023)
Article
Materials Science, Coatings & Films
Bryan G. Salazar, Christopher R. Brewer, Lisa McElwee-White, Amy V. Walker
Summary: In this study, photoassisted chemical vapor deposition (PACVD) of Ru on functionalized alkanethiolate self-assembled monolayers (SAMs) was investigated. The different deposition behaviors observed on SAMs with different functional groups were attributed to the formation of Ru-carboxylate complexes that block further deposition. Density Functional Theory calculations showed that the primary photoprocess, loss of a carbonyl ligand, did not affect the deposition behavior significantly.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2022)
Article
Chemistry, Organic
Eduardo Da Concepcion, Carlos Lazaro-Milla, Israel Fernandez, Jose L. Mascarenas, Fernando Lopez
Summary: This study investigates the application of cobalt(I) catalysts with bisphosphine ligands for promoting intramolecular cycloadditions of enynylidenecyclopropanes. The method successfully synthesizes 5,7,5-fused tricyclic systems with high yields and complete diastereo- and chemoselectivity. Interestingly, the scope and mechanism of this reaction differ from previously reported annulations using rhodium and palladium catalysts.
Article
Chemistry, Organic
Aoyun Lu, Tao Li, Jiayi Wang, Gonghua Song
Summary: An efficient one-pot strategy for the preparation of polycyclic aromatic compounds (PACs) has been developed, utilizing catalyst and base free conditions, short reaction time under microwave irradiation, and moderate to high yields of products. Mechanism study reveals a novel cascade of thermal induced intramolecular [2+2] cycloaddition and retro-[2+2] cycloaddition involved in the reaction process.
ASIAN JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Chemistry, Organic
Yolanda Navarro, Jesus Garcia Lopez, Maria Jose Iglesias, Fernando Lopez Ortiz
Summary: Through a ligand-free domino copper(I)-catalyzed azide-alkyne-azide process, 1,4-(disubstituted)-5-triazenyl-1,2,3-triazoles were synthesized successfully, and the crucial role of Cu-chelation in the interception of the intermediate by the azide was revealed through DFT calculations and X-ray diffraction analysis.
Article
Chemistry, Multidisciplinary
Lingling Liu, Hongli Wu, Genping Huang
Summary: Density functional theory calculations were used to investigate the nickel-catalyzed [3 + 2] cycloaddition reaction, revealing four major steps in the catalytic cycle. The enantioselectivity is mainly determined by the interaction between different groups, while the chemoselectivity can be rationalized in terms of steric effects.
CHINESE CHEMICAL LETTERS
(2021)
Article
Chemistry, Organic
Hao Wu, Xinyao Li, Zixi Yan, Nana Ma, Song Song, Guisheng Zhang, Ning Jiao
Summary: Described here is a Cu-catalyzed [2 + 2 + 1] modular synthesis of full-substituted beta-pyrrolinones from simple amines, alkynes, and alpha-diazo-beta-ketoesters. This approach enables the direct synthesis of full-substituted beta-pyrrolinones, which were hardly constructed by traditional synthetic strategies.
Article
Biochemical Research Methods
Pei Su, Ziyan Warneke, Daniela Volke, Michael F. Espenship, Hang Hu, Sebastian Kawa, Kaplan Kirakci, Ralf Hoffmann, Julia Laskin, Christian Wiebeler, Jonas Warneke
Summary: This study investigates the collision-induced dissociation (CID) of [Mo6X14]2- (X = Cl, Br, I) and the reactivity of fragment ions with background gases. Ion mobility measurements and theoretical calculations provide structural information. Sequential losses of MoX2 units dominate the dissociation pathways for [Mo6Cl14]2-, while loss of X radicals is the main channel for X = Br and I. Variation in mass spectra obtained using CID is observed among mass spectrometers. Ion-trap fragmentation combined with theoretical investigations indicates spontaneous losses of X radicals upon binding of O2 to [Mo6Im]- fragments (m <= 12).
JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY
(2023)
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)