Review
Chemistry, Inorganic & Nuclear
Sofia Friaes, Sara Realista, Henrique Mourao, Beatriz Royo
Summary: This article covers the recent progress in the use of N-heterocyclic carbenes (NHCs) in manganese and rhenium catalysis, with a focus on hydrosilylation, hydrogenation, borrowing hydrogen processes, as well as the electrochemical and photochemical reduction of CO2.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Quentin Le De, Amal Bouammali, Christian Bijani, Laure Vendier, Iker del Rosal, Dmitry A. Valyaev, Chiara Dinoi, Antoine Simonneau
Summary: By experiment and density functional theory (DFT), it is confirmed that the reported direct nucleophilic attack of the carbanion onto coordinated dinitrogen does not exist. Instead, phenylithium reacts with one of the CO ligands to form an anionic acylcarbonyl dinitrogen metallate that decomposes to give a phenylate complex. The DFT calculations support the experimental results, and the direct attack of a nucleophile on metal-coordinated dinitrogen remains to be demonstrated.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Inorganic & Nuclear
Georgy V. Sidorenko, Alexander E. Miroslavov, Margarita Yu. Tyupina, Vladislav V. Gurzhiy, Anna P. Sakhonenkova, Alexander A. Lumpov
Summary: In this study, tricarbonyl complexes of technetium(I) 2 + 1 were synthesized and characterized using various techniques. The crystal structures of two complexes were determined by single-crystal X-ray diffraction. The effect of chloride ions on the formation of the complexes was evaluated, and it was found that the chloride complexes were less reactive compared to the chloride-free complexes. The technetium complexes exhibited higher reactivity than their rhenium analogues.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Georgy V. Sidorenko, Alexander E. Miroslavov, Margarita Yu. Tyupina, Vladislav V. Gurzhiy, Anna P. Sakhonenkova, Alexander A. Lumpov
Summary: This study synthesized and characterized a series of technetium(I) 2 + 1 tricarbonyl complexes. The interfering effect of chloride ions on complex formation was evaluated, and the ligand replacement kinetics were compared. The results showed that chloride ions had a minimal interference effect, and the ligand replacement rates were faster in the presence of nitrate ions compared to chloride ions.
INORGANIC CHEMISTRY
(2023)
Article
Biochemistry & Molecular Biology
Alice Barbero, Laura Rotundo, Chiara Reviglio, Roberto Gobetto, Romana Sokolova, Jan Fiedler, Carlo Nervi
Summary: This study investigated the behavior of different Mn and Re catalysts for electrochemical CO2 reduction using IR spectroelectrochemistry. The results showed that CO2 could be catalytically reduced in acetonitrile even without proton donors, although at negative potentials. However, the presence of proton donors significantly enhanced the catalytic conversion.
Review
Chemistry, Multidisciplinary
Jacob A. Barrett, Christopher J. Miller, Clifford P. Kubiak
Summary: The article reviews the research on electrocatalytic reduction of CO2 to CO using Group VII transition metal bipyridine catalysts over the past decade. Strategies to further advance our mechanistic understanding of the electrocatalytic reduction of CO2 to CO are described.
TRENDS IN CHEMISTRY
(2021)
Article
Chemistry, Physical
Xiong Xiao, Tingsheng Wang, Yuanxi Zhao, Wujie Gao, Songcan Wang
Summary: Researchers propose a combination of hydrothermal and thermal treatment strategy to design a MnO-CNT@C3N4 composite cathode material. The optimized MnO-CNT@C3N4 exhibits excellent rate performance and high capacity due to the enhanced conductivity by CNTs and the alleviation of Mn2+ dissolution by C3N4. This work provides a viable strategy for the design of advanced cathodes for high-performance zinc ion batteries.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Applied
Marcel Annereau, Franck Martial, Jeremy Forte, Geoffrey Gontard, Sebastien Blanchard, Heloise Dossmann, Michele Salmain, Vincent Corce
Summary: A series of manganese(I) tricarbonyl complexes were synthesized and characterized, which could be easily obtained from a common dimeric structure. These complexes, when reacted with imidazole derivatives, led to the formation of monomeric complexes with various functional groups. Photoactivation of these complexes resulted in the release of CO, with the mechanism of CO release explored through spectroscopic and computational methods. A manganese complex containing a more elaborate imidazole ligand was successfully synthesized, allowing for its direct incorporation in peptides.
APPLIED ORGANOMETALLIC CHEMISTRY
(2023)
Article
Chemistry, Applied
Jisha Mary Thomas, Shreyas S. Kuduvalli, Thirugnanasambandhar Sivasubramanian Anitha, Chinnappan Sivasankar
Summary: A series of novel manganese complexes were synthesized and characterized using various techniques. It was demonstrated that these complexes release CO upon exposure to green light radiation. Additionally, the electronic features of these complexes were investigated using DFT and TD-DFT methods.
APPLIED ORGANOMETALLIC CHEMISTRY
(2022)
Review
Chemistry, Multidisciplinary
R. Eric Sikma, Krista P. Balto, Joshua S. Figueroa, Seth M. Cohen
Summary: This Minireview discusses recent advances in low-valent MOFs and provides insights into future developments of these materials.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Mingzhu Jiang, Jing Chen, Yanxia Gao, Xuelong Lv, Dongxu Yan, Hongpeng Jia
Summary: The interaction between Cu and Mn on the catalyst surface can effectively immobilize Cu single atoms, restrain their aggregation, and improve CO oxidation activity. The formation of the Cu-O-Mn entity benefits CO catalytic activity by accelerating reactions through the migration of reactive oxygen species and coordination effect of active centers.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Chemistry, Organic
Mikhail A. Losev, Andrey S. Kozlov, Vladimir B. Kharitonov, Oleg I. Afanasyev, Fedor S. Kliuev, Ludmila A. Bulygina, Natalya S. Khrushcheva, Dmitry A. Loginov, Denis Chusov
Summary: A simple and selective method using carbon monoxide as a reducing agent was developed for the preparation of amides from nitroarenes and carboxylic acids. The protocol does not require non-gaseous additives, simplifying product isolation and saving reducible functional groups.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2023)
Article
Chemistry, Organic
Mikhail A. Losev, Andrey S. Kozlov, Vladimir B. Kharitonov, Oleg I. Afanasyev, Fedor S. Kliuev, Ludmila A. Bulygina, Natalya S. Khrushcheva, Dmitry A. Loginov, Denis Chusov
Summary: A straightforward and selective method using carbon monoxide as a reductant was developed to prepare amides directly from nitroarenes and carboxylic acids. This protocol simplifies product isolation by not requiring any non-gaseous additives and preserves reducible functional groups.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2023)
Article
Chemistry, Physical
Liubin Luo, Bangfu Huang, Zhe Shi, Zhenjing Wen, Wanjun Li, GaoYong Zi, Linjing Yang
Summary: To investigate the mechanism of low-temperature CO + NH3 coupling selective catalytic reduction (SCR) denitration, Mn-Ce/activated carbon catalysts with varying Ce contents were prepared and characterized. The denitration rates of the catalysts followed the order of 7Mn-3Ce/AC > 7Mn-5Ce/AC > 7Mn-1Ce/AC at temperatures ranging from 150°C to 300°C and an oxygen content of 9%. The optimal Ce content resulted in a smooth catalyst surface with a homogeneous distribution of metal particles and pores, increasing the adsorption sites for CO and NH3 and promoting the denitration reaction.
CATALYSIS COMMUNICATIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Ruqaya Buhaibeh, Carine Duhayon, Dmitry A. Valyaev, Jean-Baptiste Sortais, Yves Canac
Summary: The coordination chemistry of NHC core pincer-type PCP and PCN ligands with a Mn(I) center was studied, revealing that Mn(I) complexes with bidentate and tridentate ligands exhibit different catalytic activities based on ligand structure.
Article
Materials Science, Textiles
Edwin S. Madivoli, Patrick G. Kareru, Anthony N. Gachanja, Samuel M. Mugo, David M. Sujee, Katharina M. Fromm
Summary: Cellulose nanocrystals or cellulose nanofibers with different properties can be obtained through enzymatic, chemical or mechanical treatment. In this study, cellulose nanofibers from Oryza sativa were isolated and fibrillated using the Kraft process and TEMPO mediated oxidation. The properties of the fibers changed during the treatment, and carboxyl functional groups were introduced. This offers the possibility of further chemical functionalization of cellulose nanofibers isolated from agricultural residues.
JOURNAL OF NATURAL FIBERS
(2022)
Review
Chemistry, Analytical
Lucyano J. A. Macedo, Fernando P. Rodrigues, Ayaz Hassan, Leandro N. C. Maximo, Fabio Zobi, Roberto S. da Silva, Frank N. Crespilho
Summary: Recent emergence of FTIR spectromicroscopy (micro-FTIR) as a dynamic spectroscopy for imaging to study biological chemistry has opened new possibilities for investigating in situ drug release, redox chemistry effects on biological molecules, DNA and drug interactions, membrane dynamics, and redox reactions with proteins at the single cell level. Micro-FTIR applied to metallodrugs has been playing an important role since the last decade because of its great potential to achieve more robust and controlled pharmacological effects against several diseases, including cancer. An important aspect in the development of these drugs is to understand their cellular properties, such as uptake, accumulation, activity, and toxicity. The review highlights both the potential application of micro-FTIR and its importance for studying metal-based drugs, emphasizing the perspectives of chemistry of living cells and the significance of bioimaging for localization of cellular processes to understand the mechanism of action.
ANALYTICAL METHODS
(2022)
Article
Chemistry, Medicinal
Kevin Schindler, Youri Cortat, Miroslava Nedyalkova, Aurelien Crochet, Marco Lattuada, Aleksandar Pavic, Fabio Zobi
Summary: Antimicrobial resistance poses a significant threat to human health and has a major impact on the global economy. Metal complexes, including rhenium complexes, have untapped potential as antimicrobial agents. This study investigates the antimicrobial potential of rhenium di- and tricarbonyl diimine complexes and identifies two potential targets for these compounds. The findings have implications for the future design of rhenium tricarbonyl diimine-based antibiotics.
Article
Crystallography
A. Subashini, Aurelien Crochet, K. Ramamurthi, R. Ramesh Babu, Helen Stoeckli-Evans
Summary: The title polymeric compound consists of three face-sharing CdCl6 octahedra connected by corner and edge sharing. The compound forms layers in the ab plane, and the p-methylanilinium cations are situated between the layers and interact through hydrogen bonding.
ACTA CRYSTALLOGRAPHICA SECTION E-CRYSTALLOGRAPHIC COMMUNICATIONS
(2022)
Article
Polymer Science
Edwin Shigwenya Madivoli, Justine Veronique Schwarte, Patrick Gachoki Kareru, Anthony Ngure Gachanja, Katharina M. M. Fromm
Summary: A stimuli-responsive hydrogel with inhibitory activity against Escherichia coli was prepared by chemically crosslinking carboxymethyl chitosan (CMCs) and hydroxyethyl cellulose (HEC). Polydiacetylene-zinc oxide (PDA-ZnO) nanosheets were synthesized and photopolymerized within the hydrogel matrix to impart thermal and pH responsiveness. The prepared hydrogel showed a pH-dependent swelling capacity and exhibited significant inhibitory activity against E. coli due to the slow release of zinc nanoparticles.
Article
Infectious Diseases
Youri Cortat, Miroslava Nedyalkova, Kevin Schindler, Parth Kadakia, Gozde Demirci, Sara Nasiri Sovari, Aurelien Crochet, Stefan Salentinig, Marco Lattuada, Olimpia Mamula Steiner, Fabio Zobi
Summary: In the context of the global health issue caused by antimicrobial resistance (AMR), the need for novel antimicrobial agents is urgent. Inorganic and organometallic complexes show potential as untapped sources of antibiotics. This study used a computer-aided drug design approach to synthesize and evaluate fac-Re(I) tricarbonyl complexes as antibacterial agents, with promising results.
Article
Chemistry, Inorganic & Nuclear
Kevin Schindler, Justine Horner, Gozde Demirci, Youri Cortat, Aurelien Crochet, Olimpia Mamula Steiner, Fabio Zobi
Summary: Cancer is still a leading cause of death worldwide, and the interest in organometallic complexes as anticancer drug candidates is crucial. Rhenium dicarbonyl complexes have been given less attention compared to tricarbonyl complexes. This study tested various rhenium dicarbonyl complexes in vitro against different cancer cell lines and found that some compounds showed good activity against specific cancer lines but were also toxic to healthy cells.
Article
Chemistry, Multidisciplinary
Federico Droghetti, Agnese Amati, Fabien Pascale, Aurelien Crochet, Mariachiara Pastore, Albert Ruggi, Mirco Natali
Summary: This study reports the catalytic activity of a cobalt complex and its iron analog towards CO2 reduction reaction in acetonitrile/water mixtures. The cobalt complex shows selectivity towards formate and H2, while the iron complex predominantly generates CO. The results are further confirmed under photochemical conditions.
Article
Chemistry, Multidisciplinary
Ahmed Abderrahim Yahiaoui, Nadir Ghichi, Douniazed Hannachi, Bilel Mezhoud, Amel Djedouani, Khairedine Kraim, Aurelien Crochet, Helen Stoeckli-Evans
Summary: The title Schiff base compound, (E)-2-{[(4-methoxynaphthalen-1-yl)methylidene]amino}-4-methylphenol, C19H17NO2 (I), was synthesized and characterized by various spectroscopies. The crystal structure analysis revealed the presence of dispersion forces, hydrogen bonds, and π-π interactions, resulting in a three-dimensional structure. The compound showed significant anticorrosion properties for iron and copper, which were confirmed by both experimental and computational methods.
ACTA CRYSTALLOGRAPHICA SECTION C-STRUCTURAL CHEMISTRY
(2023)
Review
Pharmacology & Pharmacy
Youri Cortat, Fabio Zobi
Summary: This review discusses the research work on coordination derivatives of antifungal azoles (AAs) synthesized for medical purposes, highlighting the most promising compounds and emphasizing the efficiency of AAs and their metallic species.
Article
Chemistry, Inorganic & Nuclear
Sara Nasiri Sovari, Isabelle Kolly, Kevin Schindler, Ana Djuric, Tatjana Srdic-Rajic, Aurelien Crochet, Aleksandar Pavic, Fabio Zobi
Summary: This study reports the synthesis, characterization, and in vivo evaluation of a series of rhenium tricarbonyl complexes containing 5- and 6-(halomethyl)-2,2'-bipyridine ligands. The aim was to investigate the role of a reactive halomethyl substituent on the diimine ligand system in the design of effective and non-toxic anticancer agents. Compounds capable of undergoing ligand-based alkylating reactions exhibited significant antiproliferative activity against colorectal and pancreatic cell lines. One specific compound (5-(chloromethyl)-2,2'-bipyridine derivative) displayed significant inhibition of pancreatic tumor growth in vivo in zebrafish-Panc-1 xenografts at a concentration of 8 μM, lower than its in vitro IC50 values, and also inhibited in vivo cancer cell dissemination.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Applied
Damien L. Berthier, Jerome Girard, Katharina M. Fromm, Andreas Herrmann
Summary: This article presents a method for measuring the evaporation kinetics of individual fragrances in perfume, and analyzes the fixative effect of a specific compound. The study reveals that certain 2-oxo-2-phenylacetate compounds have a fixative effect on fragrance evaporation, which is influenced by their molecular structure.
FLAVOUR AND FRAGRANCE JOURNAL
(2023)
