Article
Chemistry, Inorganic & Nuclear
Yang Liu, Bang-Heng Lyu, Shan-Nan Du, Guo-Zhang Huang, Ze-Yu Ruan, Si-Guo Wu, Jun-Liang Liu, Ming-Liang Tong
Summary: In this study, we presented two dysprosium single-molecule magnets with different bridging ligands, showing varying luminescence properties. While one displayed weak luminescence making simulation challenging, the other exhibited enhanced and well-resolved luminescence, providing valuable insights into magneto-optical correlation and magnetic energy levels.
DALTON TRANSACTIONS
(2021)
Review
Chemistry, Multidisciplinary
Tinghao Ma, Jiaqi Dong, Deng-Tao Yang
Summary: The incorporation of heteroatoms with different electronegativities can reshape the optoelectronic properties and introduce unique interactions. The doping strategy of heteroatom-boron-heteroatom motif has gained attention due to the mutual modulation between the boron-heteroatom unit and the isolated heteroatom.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Tingting Liu, Qingfu Wang, Liandi Wang, Kaikai Wu, Zhengkun Yu
Summary: In this study, multinuclear porphyrin-based ruthenium(II)-NNNN complexes were efficiently assembled and used for low-loading ruthenium-catalyzed transfer hydrogenation of ketones, demonstrating high catalytic activity and yields.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Chenguang Liu, Mingyang Wang, Shihan Liu, Yujie Wang, Yong Peng, Yu Lan, Qiang Liu
Summary: The article reports on the non-noble metal-catalyzed asymmetric hydrogenation of N-heteroaromatics, quinolines. A new chiral pincer manganese catalyst showed outstanding catalytic activity in the reaction, producing high yields and enantioselectivities. The precise regulation of enantioselectivity was ensured by a pi-pi interaction, achieving competitive turnover numbers with noble metal catalysts.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Review
Chemistry, Inorganic & Nuclear
Aleksandra V. Paderina, Igor O. Koshevoy, Elena V. Grachova
Summary: This work explores di- and polynuclear complexes of +1 oxidation state metal ions (M = Cu, Ag, Au) and their photophysical properties, focusing on the impact of phosphine bridging ligands, their flexibility, and denticity.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Multidisciplinary
Ryoichi Kanega, Naoya Onishi, Shinji Tanaka, Haruo Kishimoto, Yuichiro Himeda
Summary: A novel approach using multinuclear iridium complexes for catalytic hydrogenation of CO2 to methanol in the gas-solid phase was reported. The combination of a multinuclear catalyst and gas-solid phase reaction conditions led to effective production of methanol. The catalyst showed high reactivity, with a final turnover number of 113 under specific conditions.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Christophe M. Saudan, Aurelien Berrocosa, Julie Quintaine, Stephanie Spoehrle, Laurent Maggi, Herve Mosimann, Lionel Saudan
Summary: This paper reports a method for the regio- and chemoselective hydrogenation of conjugated dienals using a large bite-angle diphosphine and a neutral rhodium complex catalyst in the presence of a weak base. This method offers high selectivity, mild reaction conditions, and a neutral alternative to the commonly employed Claisen rearrangement for the synthesis of γ,δ-unsaturated aldehydes.
Article
Chemistry, Multidisciplinary
Chris Gendy, Juuso Valjus, Roland Roesler, Heikki M. Tuononen
Summary: The synthesis of dinuclear nickel complexes with cyclobutadiene-like structures was achieved, showing interesting phenomena in low-temperature NMR spectra. Additionally, the insertion of a Ni fragment into a P-P bond to form a new complex was observed.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Multidisciplinary Sciences
Bram B. C. Peters, Jia Zheng, Norman Birke, Thishana Singh, Pher G. Andersson
Summary: The authors developed a general iridium-catalyzed enantioconvergent hydrogenation method for a broad range of functionalized trisubstituted olefins. This method allows for efficient introduction of chirality into non-chiral substrates. The significance of this method lies in its ability to hydrogenate both isomerically pure alkenes and mixtures to yield the same major enantiomer in excellent enantiomeric excess, which is unusual in transition-metal catalyzed asymmetric hydrogenations.
NATURE COMMUNICATIONS
(2022)
Review
Chemistry, Inorganic & Nuclear
Ekaterina S. Gulyaeva, Elena S. Osipova, Ruqaya Buhaibeh, Yves Canac, Jean-Baptiste Sortais, Dmitry A. Valyaev
Summary: This paper provides a comprehensive review of the rapidly emerging application of organometallic manganese complexes in catalytic reactions. It focuses on the influence of different donor ligands on catalytic activity and selectivity, the comparison with polydentate systems, and the study of mechanistic aspects.
COORDINATION CHEMISTRY REVIEWS
(2022)
Article
Chemistry, Inorganic & Nuclear
Daniela Lalli, Ivan Hawala, Marco Ricci, Fabio Carniato, Luca D. D'Andrea, Lorenzo Tei, Mauro Botta
Summary: The GdAAZTA complex is a promising platform for MRI probe design due to its magnetic properties, stability, and versatility. In this study, derivatives of GdAAZTA functionalized with different amino acids were synthesized and characterized. The results showed that functionalization with amino acids maintained the hydration state of the complex and improved its relaxivity. The new complexes also exhibited excellent chemical stability in biological matrices.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Agata Szlapa-Kula, Magdalena Malecka, Anna M. Maron, Henryk Janeczek, Mariola Siwy, Ewa Schab-Balcerzak, Marcin Szalkowski, Sebastian Mackowski, Tomasz Pedzinski, Karol Erfurt, Barbara Machura
Summary: In this study, eight rhenium(I) complexes incorporating 2,2':6',2''-terpyridine (terpy) and 2,6-bis(pyrazin-2-yl)pyridine (dppy) with appended 1-naphthyl-, 2-naphthyl-, 9-phenanthrenyl, and 1-pyrenyl groups were comprehensively studied. The presence of naphthyl and phenanthrenyl substituents did not significantly affect the energy of the MLCT absorption and emission bands, while the addition of the electron-rich pyrenyl group resulted in a noticeable red shift and increased molar absorption coefficients of the lowest energy absorption. The excited states of complexes with 1-pyrenyl-functionalized ligands were found to exhibit predominant characteristics of (ILpyrene)-I-3/(ILCTpyrene -> terpy)-I-3 at 77 K.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Inorganic & Nuclear
Sofia Friaes, Sara Realista, Clara S. B. Gomes, Paulo N. Martinho, Luis F. Veiros, Martin Albrecht, Beatriz Royo
Summary: New manganese complexes with di-triazolylidene ligands display different ligand coordination modes, bridging and chelating, depending on the substituents and synthetic procedure. The structures of monometallic and bimetallic complexes were determined by X-ray diffraction studies. Cyclic voltammetry studies indicate reversible redox processes for monometallic Mn(i) complexes and a quasi-reversible EC mechanism for the oxidation of bimetallic complexes.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Organic
Jianfei Yu, Haowei Zhu, Xumu Zhang, Gen-Qiang Chen
Summary: A new series of chiral ferrocene-based diphosphino-ethane ligands, f-DPE, were developed and applied in the hydrogenation of 2-substituted acrylic acids to obtain chiral propanoic acids with high yields and enantioselectivities. The synthesis of well-known anti-inflammatory drugs, such as ibuprofen, naproxen, and flurbiprofen, was also efficiently achieved using this method. The synthetic utilities of the method were demonstrated through gram-scale experiments.
Article
Chemistry, Organic
Xixia Tang, Lu Qian, Guixia Liu, Zheng Huang
Summary: Asymmetric transfer hydrogenation of 1-aryl-1-alkylethenes with ethanol using a chiral (PCN)Ir complex as the precatalyst has been developed, demonstrating high enantioselectivities, good functional group tolerance, and operational simplicity. This method is also applied to formal intramolecular asymmetric transfer hydrogenation of alkenols without an external H-donor, allowing for the production of a tertiary stereocenter and remote ketone group simultaneously. The utility of the catalytic system is highlighted by gram scale synthesis and the synthesis of the key precursor of (R)-xanthorrhizol.
Article
Chemistry, Multidisciplinary
Yuichi Kawanobe, Naoya Kuragaki, Taro Tsubomura, Yasuomi Yamazaki, Taiki Kuribara, Kiichiro Totani
Summary: The stereoselectivity of the 1,2-cis-alpha-glucosylation reaction can be enhanced by introducing a tert-butyldimethylsilyl (TBS) protecting group into the glucosyl donor. The silyl-assist effect was mainly due to electronic factors, as shown by chemical experiments and density functional theory (DFT) calculations.
Editorial Material
Chemistry, Multidisciplinary
Jinwoo Cheon, Jenny Y. Yang, Marc Koper, Osamu Ishitani
ACCOUNTS OF CHEMICAL RESEARCH
(2022)
Review
Chemistry, Multidisciplinary
Hiromu Kumagai, Yusuke Tamaki, Osamu Ishitani
Summary: The development of highly efficient, stable, and selective photocatalytic systems for CO2 reduction using transition metal complexes as both photosensitizers and catalysts has been successful. Various molecular architectures have been discussed for constructing such systems. Hybrid systems combining metal-complex photocatalysts with semiconductor photocatalysts have shown high photooxidation powers for both oxidation and reduction processes.
ACCOUNTS OF CHEMICAL RESEARCH
(2022)
Review
Chemistry, Multidisciplinary
Yasuomi Yamazaki, Masahiko Miyaji, Osamu Ishitani
Summary: This article summarizes the catalytic systems used for the reduction of low-concentration CO2, including the process of CO2 insertion into catalysts and the application of reaction media.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
Mitsuhiko Shizuno, Kosaku Kato, Shunta Nishioka, Tomoki Kanazawa, Daiki Saito, Shunsuke Nozawa, Akira Yamakata, Osamu Ishitani, Kazuhiko Maeda
Summary: Graphitic carbon nitride nanosheets combined with a binuclear Ru(II)-Re(I) complex can selectively reduce CO2 to CO under visible light. The grafting of nanoparticulate rutile TiO2 improves the photocatalytic performance by enhancing charge separation and adsorption. Among different TiO2 polymorphs, anatase exhibits the best forward electron transfer while suppressing back electron transfer.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Yasoumi Yamazaki, Yuknori Ueshima, Yoji Mizumote, Yuri Ishikawa, Riku Maruyama, Yuki Yoshino, Yuki Sofie, Taro Tsubomura
Summary: We synthesized a new type of asymmetric binuclear Ag(I) complex, which showed relatively strong green luminescence in the solid state.
Article
Chemistry, Multidisciplinary
Yuri Ishikawa, Rumi Sato, Yasuomi Yamazaki, Taro Tsubomura
Summary: Copper(I) complexes with chiral phosphine and diimine ligands were synthesized and their chiroptical properties were investigated. The complex containing a twisted diimine ligand and a diphosphine ligand exhibited moderate-intensity emission and circularly polarized luminescence (CPL) with a significant dissymmetry factor, g(em). The signs and intensities in the CPL spectra were observed to be influenced by the dihedral angles of the two pyridine rings in the diimine ligand.
Article
Chemistry, Multidisciplinary
Yasuomi Yamazaki, Shota Furukawa, Yuri Ishikawa, Rumi Sato, Taro Tsubomura
Summary: The circularly polarized luminescence properties of Cu(I) complexes with (R)-BINAP ligands were studied. The complexes showed the highest dissymmetry factors (g(lum) approximate to 0.005) among reported Cu(I) mononuclear complexes when combined with diphosphine-dichalcogenide ligands, with emission quantum yields reaching up to 16% in dichloromethane.
Article
Chemistry, Multidisciplinary
Maria Takahashi, Tsuyoshi Asatani, Tatsuki Morimoto, Yoshinobu Kamakura, Kotaro Fujii, Masatomo Yashima, Naoki Hosokawa, Yusuke Tamaki, Osamu Ishitani
Summary: In this study, new redox photosensitisers were synthesized, which can supply different numbers and reduction potentials of electrons to the catalyst in photocatalytic reactions, providing a new approach for the reduction of CO2.
Article
Multidisciplinary Sciences
Yuya Ashida, Yuto Onozuka, Kazuya Arashiba, Asuka Konomi, Hiromasa Tanaka, Shogo Kuriyama, Yasuomi Yamazaki, Kazunari Yoshizawa, Yoshiaki Nishibayashi
Summary: The development of a nitrogen fixation process that relies on renewable energy, such as visible light, is a goal in sustainable chemistry. In this study, the authors establish an iridium and molybdenum-catalysed process for synthesizing ammonia from dinitrogen under ambient reaction conditions and visible light irradiation.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Kei Kamogawa, Antonio Santoro, Ambra M. Cancelliere, Yuushi Shimoda, Kiyoshi Miyata, Ken Onda, Fausto Puntoriero, Sebastiano Campagna, Yusuke Tamaki, Osamu Ishitani
Summary: Supramolecular photocatalysts, connected redox photosensitizer and catalyst molecules, have higher photocatalytic activity compared to separated systems. By introducing a bridging ligand, the photocatalyst's durability and efficiency can be improved.
Article
Chemistry, Physical
Daiki Saito, Yusuke Tamaki, Osamu Ishitani
Summary: Various hybrid systems of metal-complex photocatalysts and semiconductor materials have been developed for photocatalytic CO2 reduction using the Z-scheme mechanism. This study focused on the photocatalytic activity of RuRu/Al2O3 in CO2 reduction by varying the adsorption density of RuRu. Increasing the adsorption density of RuRu led to a decrease in the production of the main product, HCOOH, due to the formation of Ru polymers. The addition of mononuclear Ru(II)-complex photosensitizers improved the photocatalytic activity of RuRu by supplying electrons to suppress its decomposition.
Article
Chemistry, Physical
Marcella Bonchio, Julien Bonin, Osamu Ishitani, Tong-Bu Lu, Takeshi Morikawa, Amanda J. Morris, Erwin Reisner, Debashrita Sarkar, Francesca M. Toma, Marc Robert
Summary: Visible-light-driven conversion of CO2 to fuels and valuable compounds has been highly active in recent years. However, these processes and catalytic systems are still in early stages of development, with fundamental mechanistic challenges needing to be addressed. Collaborative efforts are needed to explore various approaches and establish robust practices to advance our understanding of these necessary processes.
Article
Chemistry, Physical
Masashi Sanga, Kosuke Nakamura, Munetaka Iwamura, Koichi Nozaki, Hiroyuki Takeda, Yu Monma, Osamu Ishitani
Summary: In this work, the emission spectra of Cu(i)(dmp)(P)2+ complexes were studied using femtosecond fluorescence up-conversion and nanosecond time-resolved emission spectroscopy. The results showed that there is a structural change of the complex with a time constant of 0.78 ps in acetonitrile solution, and 1.4 ps in butyronitrile solution. The mechanism of different processes was explained by analyzing the oscillator strengths.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
