Article
Chemistry, Multidisciplinary
Philipp Dabringhaus, Ingo Krossing
Summary: This study reports the synthesis of AlCp*-complexes with low-valent main-group metals, including the first covalent Al-In and Al-Tl bonds. The Ga complex exhibits a solvent and temperature dependent equilibrium between monomeric and dimeric forms, while the In and Tl complexes are monomeric and can be reduced by AlCp*. Addition of Me(3)TACN leads to the isomerization to a novel low-valent Al-4(+) cation. This research provides valuable insights into the reactivity of metal-main-group element complexes.
Article
Chemistry, Inorganic & Nuclear
Megan Edwards, Jamie Hicks, Caitilin McManus, Jose M. Goicoechea, Simon Aldridge
Summary: We described an improved synthesis of the NON-donor stabilized potassium gallyl dimer [K{Ga(NON)}]2 and explored its reactivity in Ga-E bond formation. The reaction with (NON)GaI led to the formation of {Ga(NON)}2 via Ga-Ga bond formation, similar to the behavior observed for the corresponding aluminyl compound. The nucleophilic attack of 1-bromopentane on [K{Ga(NON)}]2 resulted in the formation of (NON)Ga(n-pentyl), avoiding the retention of KBr often encountered in the synthesis of more Lewis acidic AlIII compounds. The attempted formation of a Mg-Ga bond yielded an unsymmetrical digallane(4) consistent with the enhanced lability of Ga within the NON ligand scaffold compared to Al.
Article
Engineering, Chemical
Mohammad Alnatheer, Ali Alqerban, Hisham Alhazmi
Summary: This study synthesized and characterized silanized graphene oxide (SGO) nanoparticles and found that 0.25 wt% SGO-modified adhesive exhibited higher shear bond strength and better antibacterial effects compared to 0.5 wt% SGO-modified adhesive. Additionally, the 0.25 wt% SGO-modified adhesive showed lower cytotoxicity, indicating its potential as a viable option for orthodontic bonding applications.
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
(2021)
Article
Chemistry, Multidisciplinary
Antoine Barthelemy, Harald Scherer, Hanna Weller, Ingo Krossing
Summary: This study presents the synthesis and characterization of two salts [(L)GaGa(L)][Al(ORF)(4)]2 ([pf]- = [Al(ORF)(4)]-), which include the first dicationic digallene [(L)Ga?Ga(L)]2+ and a digallane [(L)Ga-Ga(L)]2+. The dicationic digallene features a trans-bent [L-GaGa-L]2+ bond analogous to neutral R-GaGa-R molecules and similar to Robinson's famous Digallyne [R-GaGa-R]2-. The dicationic digallane is similar to the widely used Jones magnesium dimer but has a very short Ga-II-Ga-II single bond.
CHEMICAL COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
Na Yang, Chengshuo Shen, Guoli Zhang, Fuwei Gan, Yongle Ding, Jeanne Crassous, Huibin Qiu
Summary: Remote C-H functionalization is an important process for the conversion and utilization of arenes. A metal/template-free electrochemical strategy is developed for remote C-H functionalization in a helical system, where hydrogen atoms act as directing groups to facilitate alkoxylation. This strategy allows precise decoration of inert helicene skeletons with various alkoxy pendants. Selective decoration of a methoxy group on N-methylated aza[6]helicene leads to distinct luminescence variation upon changing solvents.
Article
Chemistry, Multidisciplinary
Alexander Friedrich, Jonathan Eyselein, Jens Langer, Christian Faerber, Sjoerd Harder
Summary: Experimental and computational studies show that the metal-metal bonds to zinc are more covalent, whereas those to magnesium are described as weak Al-I(or Ga-I)-> Mg2+ donor bonds. Additionally, failure to isolate the zinc-aluminum combination is attributed to cleavage of the C-F bond in the solvent fluorobenzene.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Eunsu Kang, Ju Eun Jeon, Siyeon Jeong, Hyun Tae Kim, Jung Min Joo
Summary: Pd-catalyzed C-H alkenylations targeting the least hindered position of N-alkyl pyrroles and 3-substituted thiophenes have been developed as an alternative to electronically controlled approaches. The steric demand and stable bidentate binding mode of the pyrazolonaphthyridine ligand are crucial for the success of these sterically controlled alkenylations using oxygen as an oxidant.
CHEMICAL COMMUNICATIONS
(2021)
Article
Biochemistry & Molecular Biology
Xiaoxiao Li, Hangyan Ji, Yuxiang Bai, Zhengyu Jin
Summary: Mutants D465E and D465N of pullulanase exhibited higher activity in the presence of β-CD, indicating improved substrate utilization. The mutation of the aspartic acid residue D465 contributed to binding inhibitors and achieving lower affinity to β-CD, leading to enhanced conversion rates from different starch sources.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Chemistry, Inorganic & Nuclear
Jacob E. Walley, Levi S. Warring, Erik Kertesz, Guocang Wang, Diane A. Dickie, Zoltan Benko, Robert J. Gilliard
Summary: The synthesis and thermal redox chemistry of the first antimony (Sb)- and bismuth (Bi)-phosphaketene adducts are investigated. It is found that N-heterocyclic carbene serves as an essential mediator for the reaction. Heating the compounds results in thermal reduction of the pnictogen centers to form tetraphenyldipnictines and an unusual bis-carbene-supported OCP salt.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Physical
Melis Toz Ertop, Orhan Cicek, Hande Erener, Nurhat Ozkalayci, Busra Demir Cicek, Fusun Comert
Summary: The aim of this study was to compare the demineralization of enamel surfaces around different types of orthodontic brackets in an artificial cariogenic environment. The results showed that Clarity ceramic brackets and Victory metal brackets had significantly lower demineralization values in the gingival, proximal, and occlusal surfaces compared to other brackets, indicating that these brackets are suitable for patients with poor oral hygiene.
Review
Chemistry, Inorganic & Nuclear
Akinobu Nakada, Takeshi Matsumoto, Ho-Chol Chang
Summary: The hybridization of functional ligands with metal atoms is a central issue in the design of reactions and catalysts based on metal complexes. Recent studies have shown that redox-active/non-innocent ligands can play various roles, such as spectators, moderators, electron/H+/0/- suppliers/poolers, cooperators, or actors, in reactions. This review highlights stoichiometric or catalytic reactions driven by substituted ethylenes and dithiolenes, as well as six-membered ligands like catecholato, benezendithiolato, aminophenolato, and o-phenelyenediamine derivatives. The chemically, electrochemically, and photochemically induced lability of these ligands is expected to provide a rich platform for useful bond-activation and bond-formation processes.
COORDINATION CHEMISTRY REVIEWS
(2022)
Article
Chemistry, Inorganic & Nuclear
Yaraslava Milasheuskaya, Jiri Schwarz, Libor Dostal, Zdenka Ruzickova, Marek Bouska, Zuzana Olmrova Zmrhalova, Tomas Syrovy, Roman Jambor
Summary: The reaction of N,C,N-chelated organogallium amide with organoboronic acids yielded molecular gallium boroxines, which can form transparent thin films. The properties of these thin films are similar to those of oxygen glass, making them potential materials for various applications.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Multidisciplinary
Yu Zhang, Toby J. Woods, Thomas B. Rauchfuss
Summary: The study investigates the oxidation of H-2 using a homoleptic rhodium pyridine complex, revealing the mechanism and catalytic properties of the reaction.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Medicinal
Kenji Mishiro, Sayaka Imai, Yuki Ematsu, Katsumi Hirose, Takeshi Fuchigami, Masayuki Munekane, Seigo Kinuya, Kazuma Ogawa
Summary: A probe with potential application in cancer therapy was synthesized and evaluated in this study. The probe contains boron clusters, a compound for nuclear medicine imaging, and a peptide for tumor targeting. Biodistribution experiments showed high uptake of the probe in the tumor.
JOURNAL OF MEDICINAL CHEMISTRY
(2022)
Article
Chemistry, Medicinal
Kenji Mishiro, Sayaka Imai, Yuki Ematsu, Katsumi Hirose, Takeshi Fuchigami, Masayuki Munekane, Seigo Kinuya, Kazuma Ogawa
Summary: In this study, a probe with boron cluster, nuclear medicine imaging and tumor targeting properties was synthesized and evaluated for its potential application in cancer theranostics. The results showed high stability and uptake of the probe in cancer cells in vitro, as well as a desirable biodistribution pattern in tumor-bearing mice.
JOURNAL OF MEDICINAL CHEMISTRY
(2022)
Article
Chemistry, Applied
Kseniya Arsenyeva, Anastasiya Klimashevskaya, Kira Pashanova, Olesya Yu Trofimova, Maxim G. Chegerev, Alyona A. Starikova, Anton Cherkasov, Georgy K. Fukin, Ilya A. Yakushev, Alexandr Piskunov
Summary: A stable O,N-heterocyclic stannylene was synthesized and characterized, and its reactivity towards various iron carbonyl compounds was studied. The compound demonstrated striking catalytic activity in the hydroboration reactions of benzaldehydes.
APPLIED ORGANOMETALLIC CHEMISTRY
(2022)
Review
Chemistry, Inorganic & Nuclear
Kira I. Pashanova, Andrey I. Poddel'sky, Alexandr V. Piskunov
Summary: This review focuses on the coordination compounds of late transition metals based on sterically hindered functionalized o-iminobenzoquinone type ligands. It discusses the relationship between structural modifications and magnetic behavior, as well as the effect of molecular structure transformations on the oxidation state, spin state multiplicity, and redox state of the metal center and organic ligands.
COORDINATION CHEMISTRY REVIEWS
(2022)
Article
Chemistry, Multidisciplinary
V. A. Dodonov, O. A. Kushnerova, R. Rumyantsev, I. L. Fedushkin
Summary: New metal-organic compounds were synthesized and characterized using various spectroscopic and elemental analysis methods. The molecular structures of some compounds were also confirmed by X-ray diffraction.
RUSSIAN CHEMICAL BULLETIN
(2022)
Article
Chemistry, Inorganic & Nuclear
K. Arsenyeva, A. Klimashevskaya, M. A. Zherebtsov, M. G. Chegerev, A. Cherkasov, I. A. Yakushev, A. Piskunov
Summary: The newly synthesized low-valent germanium complex exhibits versatile reactivity towards acid-base and redox transformations. The reactions with various reagents result in different products, showing diverse reaction characteristics under different experimental conditions. The molecular structures of the compounds are determined by X-ray diffraction.
RUSSIAN JOURNAL OF COORDINATION CHEMISTRY
(2022)
Article
Chemistry, Physical
Alena A. Lokteva, Anastasiia A. Kotelnikova, Roman S. Kovylin, Alexey N. Konev, Alexandr V. Piskunov
Summary: Nanoporous antireflective coatings were successfully obtained on silicate glass using the sol-gel method. The addition of tetrabutylammonium bromide and gold nanoparticles significantly improved the transmittance of the coatings at lower annealing temperatures.
Article
Biochemistry & Molecular Biology
Kira I. Pashanova, Irina V. Ershova, Olesya Yu. Trofimova, Roman V. Rumyantsev, Georgy K. Fukin, Artem S. Bogomyakov, Maxim V. Arsenyev, Alexandr V. Piskunov
Summary: A series of new charge transfer chromophores were synthesized and showed effective photoinduced intramolecular charge transfer with a pronounced negative solvatochromic effect.
Article
Chemistry, Inorganic & Nuclear
Anastasiya M. Zimina, Nikolay V. Somov, Yulia B. Malysheva, Nadezhda A. Knyazeva, Alexander V. Piskunov, Ivan D. Grishin
Summary: A class of POP ligands, known for their unique properties, have shown great potential in the field of coordination chemistry for their application in catalytic polymerization. Two new approaches to synthesize ruthenacarboranes with POP ligands were developed, and the synthesized complexes were characterized by various spectroscopic and crystallographic techniques. The electrochemical studies demonstrated the reversible nature of these complexes, making them suitable for catalysis in polymerization reactions.
Article
Chemistry, Inorganic & Nuclear
Vladimir A. Dodonov, Valentin M. Makarov, Marina N. Zemnyukova, Danila A. Razborov, Evgeny Baranov, Artem S. Bogomyakov, Victor I. Ovcharenko, Igor L. Fedushkin
Summary: The treatment of ytterbium metal with dpp-Bian and iodine resulted in the formation of various complexes, including azide and fluorine compounds. Oxidation of the initial complex led to electron transfer from the ligand to the metal atom. The structures of the compounds were determined using various analytical techniques.
Article
Chemistry, Physical
Roman S. Kovylin, Vladimir V. Yudin, Margarita P. Shurygina, Victor B. Fedoseev, Sergey A. Chesnokov, Igor L. Fedushkin, Alexandr V. Piskunov
Summary: Porous polymer monolith materials were synthesized using oligocarbonate dimethacrylate (OCM-2) and 1-butanol as a porogenic additive. The pore characteristics and morphology were studied, showing the formation of open and closed pores with different sizes depending on the alcohol content. The transition from one type of pore system to another was accompanied by a sharp change in the strength characteristics of the polymer.
Article
Chemistry, Inorganic & Nuclear
Kira I. Pashanova, Irina Ershova, Ilya A. Yakushev, Irina N. Meshcheryakova, Maxim Arsenyev, Alexandr Piskunov
Summary: Two monomeric heteroleptic charge transfer (CT) complexes, NiII(3,6-Cat)(DADdipp) (1) and CoII(3,6-Cat)(DADdipp) (2), were synthesized using a two-step synthetic procedure. Complex 1 exhibits a low energy ligand-to-ligand charge transfer (LL'CT), resulting in a NIR NiII chromophore with high light absorption and sensitivity to solvent polarity. Complex 2, on the other hand, shows a significant change in CT properties and a decrease in absorptivity due to the bulky ligands. The electrochemical behavior of the complexes is determined by the differences in coordination geometry and the involvement of the metal center in redox transitions.
Article
Chemistry, Multidisciplinary
Gennady G. G. Kazakov, Nikolay O. O. Druzhkov, Roman V. V. Rumyantcev, Georgy K. K. Fukin, Andrey G. G. Starikov, Alexandr V. V. Piskunov, Vladimir K. K. Cherkasov
Summary: The reactivity of phenanthro-[9,10]-(1,3,2)-diazadiphospholenes towards iron triad carbonyls has been investigated. Diphospholenes react with cobalt octacarbonyl and diiron nonacarbonyl as phosphinyl radicals. The reaction with nickel carbonyl involves the initial coordination of diphospholenes to the metal ion as Lewis bases. The obtained compounds were characterized by NMR and IR spectroscopy, and their structure was determined using X-ray structural analysis. DFT computational studies examined the bonding nature in the new compounds.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Maxim G. Chegerev, Denis Korchagin, Gennady Shilov, Nikolay N. Efimov, Andrey G. Starikov, Alexandr Piskunov, Anatoly Chernyshev, Aleksei N. Bulgakov, Vladimir Minkin, Andrei Palii, Sergey M. Aldoshin
Summary: This paper reports the synthesis and magnetic characterization of a family of cobalt-dioxolene complexes. Three complexes, including a neutral complex 1, an ionic complex 2, and an ionic complex 3, were synthesized and characterized. The structures and magnetic behaviors of these complexes were investigated.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Inorganic & Nuclear
Maxim Chegerev, Oleg Demidov, Pavel Vasilyev, Nikolay Efimov, Stanislav Kubrin, Andrey Starikov, Valery Vlasenko, Alexander Piskunov, Svetlana Shapovalova, Alexander Guda, Yury Rusalev, Alexander Soldatov
Summary: A series of ionic ferric catecholate complexes with specific ligands were synthesized and their spin transitions were investigated. The magnetic behavior of the compounds was found to be influenced by the variation of outer-sphere counteranions. The study confirmed the presence of a thermally induced spin-crossover process in the solid state for these complexes. Additionally, one of the compounds was found to exhibit valence tautomeric transition along with spin-crossover.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Inorganic & Nuclear
M. A. Agafonov, E. V. Alexandrov, N. A. Artyukhova, G. E. Bekmukhamedov, V. A. Blatov, V. V. Butova, Y. M. Gayfulin, A. A. Garibyan, Z. N. Gafurov, Yu. G. Gorbunova, L. G. Gordeeva, M. S. Gruzdev, A. N. Gusev, G. L. Denisov, D. N. Dybtsev, Yu. Yu. Enakieva, A. A. Kagilev, A. O. Kantyukov, M. A. Kiskin, K. A. Kovalenko, A. M. Kolker, D. Kolokolov, Y. M. Litvinova, A. A. Lysova, N. V. Maksimchuk, Y. V. Mironov, Yu. V. Nelyubina, V. V. Novikov, V. I. Ovcharenko, A. V. Piskunov, D. M. Polyukhov, V. A. Polyakov, V. G. Ponomareva, A. S. Poryvaev, G. V. Romanenko, A. V. Soldatov, M. V. Solovyeva, A. G. Stepanov, I. V. Terekhova, O. Yu. Trofimova, V. P. Fedin, M. V. Fedin, O. A. Kholdeeva, A. Yu. Tsivadze, U. Chervonova, A. I. Cherevko, V. F. Shul'gin, E. S. Shutova, D. G. Yakhvarov
Summary: This review summarizes the current research fields of metal-organic frameworks (MOFs) developed by Russian scientific institutions and universities in the last 5-10 years, including design, synthesis, topological description, and prediction of MOF properties, development of chemical engineering and modification methods, investigation using modern physicochemical techniques, and creation of functional materials based on porous frameworks.
JOURNAL OF STRUCTURAL CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Arina Maleeva, Irina Ershova, Olesya Yu Trofimova, Kseniya Arsenyeva, Ilya A. Yakushev, Alexandr Piskunov
Summary: In this study, Gallium (III) catecholates with bipyridine ligands were synthesized and characterized using single-crystal X-ray diffraction. The near-infrared ligand-to-ligand charge transfer of the pentacoordinate complex was observed.
MENDELEEV COMMUNICATIONS
(2022)
