Article
Chemistry, Inorganic & Nuclear
Evangelos Pilichos, Annia Tubau, Saskia Speed, Merce Font-Bardia, Albert Escuer, Arnald Grabulosa, Julia Mayans
Summary: A new family of lanthanide compounds with different structures and properties have been synthesized using dppeO(2) as a ligand. The compounds exhibit a two-dimensional or one-dimensional structure depending on the lanthanide cation. Some of the compounds have magnetic or luminescent properties, and they can be used as structural probes or for specific applications.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Multidisciplinary
Michael C. Haibach, Andrew R. Ickes, Sergei Tcyrulnikov, Shashank Shekhar, Sebastien Monfette, Rafal Swiatowiec, Brian J. Kotecki, Jason Wang, Amanda L. Wall, Rodger F. Henry, Eric C. Hansen
Summary: The high cost and negative environmental impact of precious metal catalysts have led to an increased demand for nonprecious alternatives. This study presents the development of an inexpensive and air-stable precatalyst that can effectively catalyze the coupling of important heteroaryl pinacolborons with heteroaryl halides. The catalyst can tolerate sensitive functional groups under mildly basic conditions that were incompatible with other methods.
Article
Chemistry, Inorganic & Nuclear
Reike Clauss, Saral Baweja, Dmitri Gelman, Evamarie Hey-Hawkins
Summary: A series of novel heterobimetallic Pd-II/M-II complexes were synthesized and exhibited a cooperative effect in catalyzing coupling reactions, leading to improved catalytic activity and selectivity for the formation of various Z-alkenes. The homogeneous nature of the catalytically active species was also demonstrated in the study.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Inorganic & Nuclear
Quinton J. Bruch, Noah D. McMillion, Chun-Hsing Chen, Alexander J. M. Miller
Summary: Oxidative addition is a fundamental reaction in organometallic chemistry and catalysis, but examples of P-O bond activation are rare. In this study, we report the ligand-templated oxidative addition of a phosphinite P-O bond in a diphosphinito aniline compound, resulting in the formation of a (PONO)Ni((HPPr2)-Pr-i) complex after proton rearrangement. Notably, the P-O bond cleavage occurs selectively over an amine N-H bond activation. Furthermore, the ligand cannibalization is reversible, as various XPR2 reagents can readily produce different (P2ONO)NiX complexes and free HPiPr(2).
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Eman A. M. Khalil, Gehad G. Mohamed
Summary: Mixed ligand complexes of several metal ions were synthesized and characterized using various techniques, revealing their structure and properties. These complexes showed promising biological and anticancer activities, indicating potential applications in the field.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Chemistry, Inorganic & Nuclear
A. Ziolkowska, N. Szynkiewicz, J. Ryl, L. Ponikiewski
Summary: The reactivities of two selected phosphanylphosphaalkenes, Ph2C=P-PtBu2 (1a) and (p-MeO-Ph)(2)C=P-PtBu2 (1b), towards CuCl, AgCl and (tht)AuCl (tht = tetrahydrothiophene) were investigated. New phosphanylphosphaalkene dimeric and monomeric complexes (Cu and Ag dimeric, and Au monomeric) were formed as a result. All obtained products were stable in air and moisture, and were insensitive to light.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Multidisciplinary
Masrat Mohmad, Nivedita Agnihotri, Vikas Kumar, Mohammad Azam, Raj Kamal, Ashish Kumar, Ujjawal Sharma, Saleem Javed, Sambantham Muthu, Kim Min
Summary: A novel benzopyran-based platinum complex was prepared and studied using UV-visible spectrophotometry. The complexation between Pt(II) and HToC resulted in the formation of a stable binary yellow complex. The analytical results showed that the complex exhibits good sensitivity, versatility, and cost-effectiveness. DFT studies revealed the molecular geometry and other structural specifics of the complex. The complex demonstrated better antiproliferative potential, antimicrobial activity, and antioxidant capacity compared to the ligand.
Review
Chemistry, Medicinal
Talita Kuijpers, Burgert Blom
Summary: This article provides a detailed survey of bimetallic platinum and palladium complexes investigated as potential anticancer agents, focusing on the synthesis, characterisation, and biological studies of a specific sub-class of these agents. The in vitro and in vivo activities, as well as the mechanistic anticancer studies of these complexes, are reviewed with the aim of delineating patterns in biological activity and structure-activity relationships.
EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY
(2021)
Article
Chemistry, Inorganic & Nuclear
Victoria V. L. Mueller, Peter V. Simpson, Kun Peng, Uttara Basu, Dominik Moreth, Christoph Nagel, Sebastian Tuerck, Luciano Oehninger, Ingo Ott, Ulrich Schatzschneider
Summary: The introduction of triazolate as a protective group to the inner metal coordination sphere modulated the biological activity of Pd(II) and Pt(II) complexes towards cancer cell lines and the inhibition of selenoenzyme thioredoxin reductase (TrxR) in an unexpected way. The palladium compound exhibited significantly greater potency than the isostructural platinum analogue and showed submicromolar activity on the most responsive cell line. This difference was also observed in the inhibitory efficiency toward TrxR.
INORGANIC CHEMISTRY
(2023)
Article
Multidisciplinary Sciences
Eiji Kudo, Kota Sasaki, Shiori Kawamata, Koji Yamamoto, Tetsuro Murahashi
Summary: The authors describe a method for selective isomerization of E-1,3-dienes to Z-isomers without photoirradiation using a dinuclear Pd(I)-Pd(I) complex, achieving kinetic trapping through rational sequences of reactions.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Himadri Sekhar Chatterjee, Suvendu Maity, Satyajit Halder, Prasanta Ghosh, Kuladip Jana, Pradip Kumar Mahapatra, Chittaranjan Sinha
Summary: In this study, a molecule, 4-(3,5-Di-tert-butyl-2-hydroxyphenylamino)-N-(6-methoxypyridazin-3-yl)benzenesulfonamide (LSOAPH2), with a 2-aminophenol group was synthesized and characterized. The o-iminosemiquinonate monoanion (LSOISQ) was obtained through an electrochemical oxidation reaction and its properties were confirmed by spectroscopy. LSOAPH2 and LSOISQ exhibited anticancer activity in human cancer cell lines, with LSOISQ showing superior efficacy compared to LSOAPH2.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Miha Ravbar, Amadeja Koler, Muzafera Paljevac, Mitja Kolar, Peter Krajnc, Jernej Iskra
Summary: In this study, palladium was immobilized on a highly porous copolymer to obtain a supported catalyst with good catalytic activity and recyclability. The immobilized catalyst was able to catalyze the coupling reaction at room temperature and tolerated various substituents on the aromatic ring.
Article
Chemistry, Physical
Ernest Ubasart, Irene Mustieles Marin, Juan Manuel Asensio, Gabriel Mencia, Angela M. Lopez-Vinasco, Cristina Garcia-Simon, Iker del Rosal, Romuald Poteau, Bruno Chaudret, Xavi Ribas
Summary: The synthesis of metallic nanoparticles with high surface area and controlled shape is crucial for improving their catalytic performance. In this study, a synthetic methodology for sub-nanometric Ru nanoparticles was developed using a tetragonal prismatic supramolecular nanocapsule. The catalytic properties of these sub-nanometric nanoparticles were tested and the encapsulation of [Ru-5] clusters inside the nanocapsule was observed. A thorough study enlightened the nature of the trapped clusters and proposed them as the first-grown seeds of subsequent formation of the subnanometric Ru nanoparticles. The double role of the nanocapsule in stabilizing nanoparticles and hosting ultra-small Ru clusters is unprecedented and may lead to the synthesis of ultra-small metallic clusters for catalytic purposes.
NANOSCALE HORIZONS
(2022)
Article
Chemistry, Multidisciplinary
Hyeong-Hwan Lee, Jihye Oh, Shim Sung Lee, In-Hyeok Park
Summary: A novel flexible tripyridyl disulfide ligand (L) was synthesized and used to form different types of one-dimensional coordination polymers with copper and silver salts. The silver complexes showed enhanced emissions, while the copper complex did not emit light.
Article
Chemistry, Multidisciplinary
Quentin Duez, Paul Tinnemans, Johannes A. A. W. Elemans, Jana Roithova
Summary: We present a new approach to determine ligand exchange parameters based on electrospray ionization mass spectrometry (ESI-MS). This method allows for the quantitative investigation of the solution-phase equilibria by introducing isotopically labelled ligands to a solution of metal host and unlabelled ligands. Our ESI-MS approach provides rate constants and activation parameters for ligand dissociation in the solution, providing mechanistic insights that are not easily obtained from traditional solution-phase techniques.
Review
Chemistry, Multidisciplinary
Kimihisa Yamamoto, Takane Imaoka, Makoto Tanabe, Tetsuya Kambe
Article
Chemistry, Multidisciplinary
Kazutaka Sonobe, Makoto Tanabe, Kimihisa Yamamoto
Article
Chemistry, Inorganic & Nuclear
Take-aki Koizumi, Yoshitaka Tsuchido, Tomohito Ide, Kohtaro Osakada
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2020)
Article
Chemistry, Multidisciplinary
Kazutaka Sonobe, Makoto Tanabe, Takane Imaoka, Wang-Jae Chun, Kimihisa Yamamoto
Summary: Subnanoparticles with sizes of approximately 1 nm show potential for enhancing catalytic performance of transition metals and their oxides, particularly in selective oxidation reactions. The electronic states and oxophilicity of copper oxide SNPs remain a topic of debate, especially in terms of their redox properties during oxidation reactions for hydrocarbons. In this study, in situ X-ray absorption fine structure (XAFS) measurements of Cu28Ox SNPs prepared using a dendritic phenylazomethine template revealed a lower temperature of T-50=138 degrees C for the Cu-II -> Cu-I reduction reaction due to Cu-O bond elongation in the ultrasmall copper oxide particles.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Biochemistry & Molecular Biology
Daisuke Takeuchi, Yoshi-aki Tojo, Kohtaro Osakada
Summary: A diimine ligand with unique structure was prepared and its corresponding nickel complex was successfully synthesized, showing selectivity and kinetic parameters in catalytic reactions of different hydrocarbons.
Article
Chemistry, Multidisciplinary
Kazutaka Sonobe, Makoto Tanabe, Takane Imaoka, Wang-Jae Chun, Kimihisa Yamamoto
Summary: The cover of this issue features Kimihisa Yamamoto and his colleagues at Tokyo Institute of Technology and International Christian University, showcasing the enhanced reactivity of copper oxide subnanoparticles under low-temperature conditions.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Chemistry, Inorganic & Nuclear
Yusuke Yoshigoe, Yuji Suzaki, Kohtaro Osakada
Summary: The reaction of Distannylated Troger's base with PtCl2(cod) yielded a mixture of macrocyclic diplatinum complex and oligomers, with reductive elimination observed when heated with excess PPh3, leading to a diastereoselective product. H-1 NMR and DFT studies showed a molecular structure with Troger's base units having smaller arylene rings compared to dimethyl Troger's base.
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
(2021)
Article
Chemistry, Physical
Neli Mintcheva, Marinela Panayotova, Gospodinka Gicheva, Orlin Gemishev, Georgy Tyuliev
Summary: Silver nanoparticles (AgNPs) were supported on natural and modified zeolites through loading silver ions (Ag+) followed by thermal reduction, resulting in nanocomposites with different antibacterial activities. Na-modified zeolite demonstrated the highest antibacterial activity against Escherichia coli among the tested composites.
Article
Chemistry, Multidisciplinary
Hiromu Koizumi, Makoto Tanabe, Tetsuya Kambe, Takane Imaoka, Wang-Jae Chun, Kimihisa Yamamoto
Summary: Binary oxide clusters (BOCs) composed of Cu and Bi atoms were prepared using a macromolecular dendritic template. The oxidized Cu16Bi12Ox exhibited selective styrene bisperoxidation. The catalytic performance and durability were improved by incorporating Bi into the CuOx clusters.
Article
Biochemistry & Molecular Biology
Yuji Suzaki, Tomoko Abe, Asami Takei, Yugo Fukuchi, Take-aki Koizumi, Kohtaro Osakada, Masaki Horie
Summary: This study successfully synthesized single crystals of pseudorotaxanes and revealed their structures and properties through X-ray crystallography.
Review
Chemistry, Inorganic & Nuclear
Takane Imaoka, Akiyoshi Kuzume, Makoto Tanabe, Takamasa Tsukamoto, Tetsuya Kambe, Kimihisa Yamamoto
Summary: Miniaturizing metallic materials from the nanoscale to the atomic scale transforms their structures and physical properties. Some sub-nanoscale catalysts exhibit higher activity than conventional nanoparticle catalysts, and certain subnanoparticles become superatoms with unique physical properties deviating from those of the original elements. However, conventional metallurgy and chemistry do not always apply to the synthesis, structural analysis, and functional design of materials at the sub-nanoscale due to the disappearance of crystal structures. This review focuses on atom hybridization, a series of materials research that involves hybridizing atoms to create desired materials for various applications.
COORDINATION CHEMISTRY REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Neli Mintcheva, Dinesh Kumar Subbiah, Marat E. Turabayev, Stanislav O. Gurbatov, John Bosco Balaguru Rayappan, Aleksandr A. Kuchmizhak, Sergei A. Kulinich
Summary: The preparation method can greatly affect the properties of mixed-oxide materials, which often show better performance in photocatalysis and gas sensing compared to single-metal oxides. In this study, semiconductor nanomaterial hybrids based on TiO2 and ZnO were prepared using laser ablation and tested as chemiresistive gas sensors. The gas-sensing properties of the hybrids were found to be influenced by their surface chemistry, morphology, crystallinity, and phase composition.
Article
Chemistry, Multidisciplinary
Yuji Suzaki, Yugo Fukuchi, Hiroko Tadami, Take-aki Koizumi, Kohtaro Osakada, Tomohito Ide, Masaki Horie, Norihisa Hoshino, Tomoyuki Akutagawa
Summary: Pseudorotaxane undergoes crystalline phase transition at specific temperatures, forming a new crystal form. Additionally, a gel can be formed through ultrasonication of a mixture of axle and cyclic molecules in PhCl solution.
Article
Chemistry, Inorganic & Nuclear
Yasushi Nishihara, Yasuhiro Nishide, Kohtaro Osakada
Summary: A novel dimeric boryloxorhodium complex was synthesized and used as a catalyst for the addition reaction of arylboronic acid to cyclohexene-2-one through transmetalation.
DALTON TRANSACTIONS
(2021)
Article
Polymer Science
Daisuke Takeuchi, Makoto Nakamura, Kohtaro Osakada
Summary: Pd-Diimine complexes catalyse the copolymerisation of 1-alkenes with olefins having a bulky oxygen-containing substituent, yielding copolymers containing functional groups. Repeating units from VTO and MVD are mainly incorporated into the terminal of the branches and the main chain of the copolymer, respectively.
