Article
Chemistry, Inorganic & Nuclear
Pokpong Rungthanaphatsophon, Alexander J. Gremillion, Yuzhong Wang, Steven P. Kelley, Gregory H. Robinson, Justin R. Walensky
Summary: N-Heterocyclic Carbene (NHC) ligands play a crucial role in synthesizing novel metal and main group-containing compounds. This study focuses on the coordination chemistry of CS2 and PhNCS derivatives of the sterically encumbering 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene (IPr).
INORGANICA CHIMICA ACTA
(2021)
Article
Chemistry, Inorganic & Nuclear
Vignesh Nayak, Prajwal Sherugar, Mahesh Padaki, B. M. Geetha, Srinivasa Budagumpi
Summary: Coinage metal complexes with N-heterocyclic carbene (NHC) ligands show potential applications in hydrogen gas purification, and utilizing encapsulated membranes for purification can achieve good separation efficiency and selectivity.
JOURNAL OF COORDINATION CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Orhi Esarte Palomero, Ashley L. Cunningham, Bryan W. Davies, Richard A. Jones
Summary: Three new coinage metal carbene complexes of silver and gold synthesized from a thiamine inspired proligand were characterized and found to exhibit potent antimicrobial activity, with the gold carbene derivative showing the strongest activity against Gram-positive methicillin-resistant Staphylococcus aureus (MRSA) in MIC studies.
INORGANICA CHIMICA ACTA
(2021)
Article
Chemistry, Organic
Bijin Lin, Xumu Zhang, Cong-Ying Zhou, Chi-Ming Che
Summary: An efficient method for synthesizing a PEGylated N-heterocyclic carbene(NHC)-gold(i) complex was described, which exhibited high reactivity and regio-selectivity in the cyclization of various alkynoic acids and cascade reaction of tryptamine and alkynoic acids in water. A systematic study of double cyclization of dialkynoic acids to construct spiro enol lactones was reported for the first time. Importantly, this water-soluble catalyst could be recycled seven times while maintaining good catalytic activity.
ORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Physical
Ricardo J. Alves, Laize Zaramello, Elvis N. Nishida, Frank H. Quina, Bruno S. Souza
Summary: In this study, we investigated the transient formation of N-heterocyclic carbenes (NHCs) in zwitterionic imidazolium sulfonate surfactants in a water environment. The formation of NHCs was accelerated above the critical micelle concentration, due to increased local concentration of hydroxide or deuteroxide ions. The rate of NHC formation could be controlled by the anions of added salts, which also affected the selectivity of anion binding to the micelle surface. The NHCs generated at the micelle surface promoted the selective oxidation of 4-nitrobenzaldehyde, demonstrating the importance of micellar microenvironment in controlling reactivity and selectivity in aqueous media.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Biochemical Research Methods
Fady Nahra, Nikolaos Tzouras, Alba Collado, Steven P. Nolan
Summary: N-heterocyclic carbene gold(I) chloride and hydroxide complexes are commonly used as synthetic reagents and efficient catalysts. This study describes a straightforward and practical method for synthesizing mononuclear gold complexes with high yields, as well as the synthesis of a mononuclear gold(I) hydroxide complex and an improved synthesis method for a dinuclear gold(I) hydroxide complex. This methodology offers advantages such as the use of sustainable reaction solvents and commercially available starting materials.
Article
Chemistry, Inorganic & Nuclear
Abdollah Neshat, Atiyeh Mahdavi, Mohammad Reza Yousefshahi, Mahdi Cheraghi, Vaclav Eigner, Monika Kucerakova, Michal Dusek, Forough Rezaie, Babak Kaboudin
Summary: A series of heteroleptic mononuclear complexes were synthesized by the derivatization of (NHC)-M-Cl (M = Ag, Au) with selected sulfur donors. X-ray diffraction analysis and molecular simulations provided insights into the electronic structures of these metal complexes. In vitro cellular tests showed that compounds 2 and 8 exhibited inhibitory effects on cancerous breast cells. Additionally, these complexes demonstrated antibacterial activity against certain bacteria and had effects on tyrosinase and hemolysis.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Applied
Zhoveta Yhobu, Geetha Basappa Markandeya, Jan Grzegorz Malecki, Hosapalya Thimmaiah Srinivasa, Rangappa S. Keri, Doddahalli Hanumantharayudu Nagaraju, Mohammad Azam, Saud Al-Resayes, Srinivasa Budagumpi
Summary: This study demonstrates the first use of pyridine-functionalized NHC gold(I) binuclear metallacycles with aptly designed ligand field as electrocatalysts for the oxygen evolution reaction. The results show that these gold(I) binuclear metallacycles can serve as suitable electrocatalysts for the oxygen evolution reaction.
APPLIED ORGANOMETALLIC CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
B. M. Geetha, Zhoveta Yhobu, V Monica, Jan Grzegorz Malecki, D. H. Nagaraju, Mohammad Azam, Saud Al-Resayes, Srinivasa Budagumpi
Summary: The design and systematic investigation of electrocatalysts are crucial in developing catalysts for various applications. This study focuses on the development of molecular catalysts for the hydrogen evolution reaction (HER) using N-heterocyclic carbene (NHC) metal complexes. The electrocatalytic performance of binuclear metal-NHC complexes was evaluated, and their structures were confirmed by single-crystal X-ray diffraction.
JOURNAL OF COORDINATION CHEMISTRY
(2022)
Review
Chemistry, Multidisciplinary
Zikun Wang, Nikolaos V. Tzouras, Steven P. Nolan, Xihe Bi
Summary: Silver N-heterocyclic carbenes (Ag-NHCs) have good biocompatibility and are widely used in medicine and coordination chemistry, but their coordination with silver can weaken the Lewis acidity of Ag(I), resulting in slow development as catalysts. Future opportunities lie in further research on the catalytic mechanisms of Ag-NHCs to enhance their catalytic activity.
TRENDS IN CHEMISTRY
(2021)
Article
Chemistry, Inorganic & Nuclear
Mert Olgun Karatas, Namik Ozdemir, Melda Sariman, Selami Gunal, Engin Ulukaya, Ismail Ozdemir
Summary: Two novel silver(I) complexes with ionic N-donor benzimidazoles have been synthesized and characterized, showing high solubility and stability in water. While they do not demonstrate significant anti-growth effects against cancerous human cells, they exhibit remarkable antimicrobial effects against a range of microorganisms, including both Gram-negative and Gram-positive bacteria, and fungi, at normalized minimum inhibitory concentrations (normalized MICs) between 33-268 μM.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Multidisciplinary
Niklas F. Both, Anke Spannenberg, Haijun Jiao, Kathrin Junge, Matthias Beller
Summary: The use of bis(NHC) manganese(I) complexes 3 as catalysts for the hydrogenation of esters was investigated. Various aromatic and aliphatic esters were successfully hydrogenated at mild temperatures and low catalyst loadings using complexes 3 with KHBEt3 as additive, highlighting the efficiency of the novel catalytic system. Additionally, the versatility of the developed catalytic system was demonstrated by the hydrogenation of other substrate classes like ketones, nitriles, N-heteroarenes, and alkenes.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Biochemistry & Molecular Biology
Carlos J. Carrasco, Francisco Montilla, Eleuterio Alvarez, jose Manuel Calderon-Montano, Miguel Lopez-Lazaro, Agustin Galindo
Summary: A series of silver complexes were synthesized and characterized by various analytical methods, indicating the maintenance of N-heterocyclic carbene properties in solution. In the evaluation of anticancer activity, it was found that the activity of silver complexes was affected by the volume of R alkyl group, and the chirality also had an impact on anticancer activity.
JOURNAL OF INORGANIC BIOCHEMISTRY
(2022)
Article
Chemistry, Applied
Andrea Longhi, Marco Baron, Marzio Rancan, Gregorio Bottaro, Laura Orian, Claudia Graiff, Marco Roverso, Ileana Menegazzo, Lidia Armelao, Sara Bogialli, Cristina Tubaro
Summary: This study explored the coordinating properties of the bis(1,4-dimethyl-1,2,4-triazol-5-ylidene) ligand (bitz) towards silver(I) and gold(I) centers. Results showed that bitz behaves as a bridging ligand, forming both dinuclear and trinuclear complexes, which were supported by X-ray diffraction analysis, NMR spectroscopy, and mass spectrometry evidence.
APPLIED ORGANOMETALLIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Paul Zaby, Jan Blasius, Anna K. Mueller, Steven P. Nolan, Oldamur Holloczki
Summary: The formation mechanism of metal-N-heterocyclic carbene (NHC) complexes from imidazolium salts in the presence of weak bases was investigated through theoretical methods. Quantum chemical calculations revealed that both sodium acetate and trimethylamine facilitate complex formation. Molecular dynamics simulations showed that the ionic nature of the [AuCl2](-) and imidazolium ions, as well as the sodium acetate base, keep these species associated in the reaction mixture through ion pairing. The neutral amine, however, remains mostly separated from the other reaction partners, making it a significantly less effective base.
CHEMISTRY-A EUROPEAN JOURNAL
(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)