Article
Chemistry, Physical
Martin Soto, Vicente Gotor-Fernandez, Humberto Rodriguez-Solla, Walter Baratta
Summary: The transfer hydrogenation of flavanones and ortho-hydroxychalcones catalyzed by ruthenium pincer complexes allows the synthesis of ortho-hydroxy 1,3-diarypropanols with high yield and selectivity. The amount of co-catalyst is crucial for the reduction reaction, while using pincer catalysts with specific ligands can achieve high enantiomeric excess and moderate conversion rates in the reduction of flavanones.
Article
Chemistry, Physical
Zheng Wang, Xiuli Yan, NIng Ma, Song Liu, Peng Han, Huiliang Li, Qaiser Mahmood, Libin Li, Qingbin Liu
Summary: The [fac-PNN]RuH(PPh3)(CO) complex has been identified as a highly efficient catalyst for the hydrogenation of arylcarbamates and their derivatives. This catalytic system offers a promising route for the depolymerization and recycling of polyurethanes. The mechanism of carbamate hydrogenation has been established through DFT calculations and control experiments.
JOURNAL OF CATALYSIS
(2023)
Article
Chemistry, Inorganic & Nuclear
Bedraj Pandey, Jeanette A. Krause, Hairong Guan
Summary: This study reports a new Pincer ligand system and its catalytic activity and stability in catalytic hydrogenation and dehydrogenation reactions.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Viktoriia Zubar, Aleksandra Brzozowska, Jan Sklyaruk, Magnus Rueping
Summary: A new manganese-catalyzed heterocyclization of aminoalcohols has been developed, leading to a wide range of heterocycles including tetrahydroquinolines, dihydroquinolinones, and tetrahydro-1H-benzo[b]azepines. The reaction is conducted under mild conditions using air and moisture stable manganese catalysts, resulting in good to excellent yields of the desired heterocycles.
Article
Chemistry, Multidisciplinary
Shrouq Mujahed, Evamarie Hey-Hawkins, Dmitri Gelman
Summary: Traditionally, low-valent metals dominate the field of catalytic hydrogenation, but high-valent metals can also achieve catalytic hydrogenation through heterolytic bond activation, with better efficiency than low-valent metals. The Ru-IV catalyst with a bifunctional PCP pincer ligand can efficiently catalyze the hydrogenation of aldehydes and carboxylic compounds under molecular hydrogen, even at room temperature.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Multidisciplinary Sciences
Wenjun Yang, Ivan Yu Chernyshov, Robin K. A. van Schendel, Manuela Weber, Christian Muller, Georgy A. Filonenko, Evgeny A. Pidko
Summary: In this study, a highly efficient manganese pincer pre-catalyst was reported, displaying high TOF values (up to 41,000 h(-1)) and stability (TON up to 200,000) at loadings as low as 5-200 ppm. The crucial role of catalyst activation step for the catalytic performance and stability of the system was highlighted, with activation using hydride donor promoters significantly improving catalytic performance and eliminating induction times. Manganese-based hydrogenation catalysts are shown to be sensitive to high temperatures, but this pre-catalyst offers a promising alternative.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Organic
Lei Zhang, Chengyu Liu, Maolin Sun, Chaoming Liang, Liming Cao, Xiantong Yao, Yueyue Ma, Ruihua Cheng, Jinxing Ye
Summary: An iridium catalytic system using a ferrocene-based phosphine ligand with a modular and tunable unsymmetrical vicinal diamine scaffold was developed for the asymmetric hydrogenation of aryl ketones. This method provided a powerful tool for the enantioselective synthesis of diverse chiral alcohols, exhibiting excellent reactivity and enantioselectivity (yield up to 99%, ee up to 99%, and turnover number up to 50,000). The substituents and chirality of unsymmetrical diamines in the ligands played a crucial role in achieving satisfactory results.
JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Julia B. Curley, Tanya M. Townsend, Wesley H. Bernskoetter, Nilay Hazari, Brandon Q. Mercado
Summary: This article describes the synthesis of a series of Fe, Co, and Ni complexes supported by an (PNP)-P-iPr-P-Ph pincer ligand, and compares them to related complexes supported by (PNP)-P-iPr-P-H and (PNP)-P-iPr-P-Me ligands. The (PNP)-P-iPr-P-Ph-supported complexes show major differences in stability, reactivity, and spectroscopic features.
Article
Chemistry, Inorganic & Nuclear
Julia B. Curley, Clayton Hert, Wesley H. Bernskoetter, Nilay Hazari, Brandon Q. Mercado
Summary: A series of ruthenium complexes containing hydride were synthesized with a novel pincer ligand, and their catalytic activities for formic acid dehydrogenation and CO2 hydrogenation were evaluated. The nitrogen substituent on the pincer ligand was found to have a significant impact on the coordination chemistry and catalytic performance, with different nitrogen substituents leading to the formation of different isomers and affecting catalytic efficiency.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Renat Kadyrov
Summary: An efficient and simple catalytic system has been developed for the hydrogenation of carboxylic esters using commercially available Ru-salts and imidazolium salts. This combination enables the reduction of esters to alcohols at moderate temperature and pressure, offering a practical method for alcohol synthesis.
JOURNAL OF CATALYSIS
(2023)
Article
Chemistry, Multidisciplinary
Sandeep Suryabhan Gholap, Abdullah Al Dakhil, Priyanka Chakraborty, Huaifeng Li, Indranil Dutta, Pradip K. Das, Kuo-Wei Huang
Summary: Well-defined and air-stable PN3-pincer manganese(ii) complexes were synthesized and used for the hydrogenation of aldehydes into alcohols, applicable for a wide range of aldehydes containing various functional groups. The methodology was also demonstrated for the conversion of biomass derived feedstocks into corresponding alcohols.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Inorganic & Nuclear
Ranjeesh Thenarukandiyil, Rohit Kamte, Subhash Garhwal, Philipp Effnert, Natalia Fridman, Graham de Ruiter
Summary: Acceptorless alcohol dehydrogenation is a powerful reaction for sustainable synthesis. In this study, efficient manganese-catalyzed a-methylation of ketones and indoles was reported, which supports a diverse set of functional groups and provides excellent yields. The use of methanol as a green and renewable feedstock increases the sustainability of the acceptorless dehydrogenation.
Article
Chemistry, Multidisciplinary
Marta Fernandez-Buenestado, Rosie J. Somerville, Joaquin Lopez-Serrano, Jesus Campos
Summary: We present a novel iridium system with a long-tethered PGeP ligand, which allows access to the less common germylene form, never reported before for an 'NHC-type' Ge ligand. Computational studies confirm its bonding, and we demonstrate its application in the catalytic dehydrogenation of formic acid, showcasing the potential of this underdeveloped ligand type.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Pablo Hermosilla, Pilar Garcia-Orduna, Fernando J. Lahoz, Victor Polo, Miguel A. Casado
Summary: New complexes were synthesized by reacting lutidine-based NHCs with [Rh(acac)(nbd)] under the presence of Cs2CO3, leading to the formation of a variety of cationic and neutral complexes. These complexes were characterized by VT NMR measurements and X-ray crystallography, with reactivity studies towards hydrogenation revealing different mechanisms based on the ligands involved.
Review
Chemistry, Inorganic & Nuclear
Hugo Valdes, Juan M. German-Acacio, Gerard van Koten, David Morales-Morales
Summary: This study explores the synthesis and applications of bimetallic complexes by merging a metallocene and a (cyclopentadienyl/aryl) pincer metal complex, discussing their importance in tuning electronic properties, catalytic reactions, and chiral catalysis. Various approaches to merge metallocene and pincer-metal motifs are explored, showcasing the potential for creating diastereomerically pure derivatives through post-functionalization strategies. The authors aim to inspire further research in this field by highlighting the synthetic, physico-chemical properties, and remarkable catalytic activities of metallocene-based pincer-metal complexes.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Multidisciplinary
He Li, Yunjie Tu, Tao Tu, Qi Zhang
Summary: In this study, proteases were immobilized using a nanoflower-like zeolitic imidazole framework (nfZIF), which showed excellent performance in immobilizing proteases and resulted in protease@nfZIF composites with comparable or even higher activities than free proteases in solution. These composites demonstrated stability in high temperature and organic solvents, and retained almost full activity after multiple reaction cycles. This study highlights the great potential of nfZIF in protease immobilization, which could be of interest in various industrial applications.
CHINESE JOURNAL OF CHEMISTRY
(2023)
Article
Biology
Tianqi Liu, Yining Liu, Xiangqian Su, Lin Peng, Jiangbo Chen, Pu Xing, Xiaowen Qiao, Zaozao Wang, Jiabo Di, Min Zhao, Beihai Jiang, Hong Qu
Summary: Screening cancer genomes identified CNV-lncRNA-mRNA regulatory triplets associated with CNVs and aberrant expression of both mRNAs and lncRNAs. A patient-specific multi-dimensional integrative approach was implemented to uncover coherent signals from multiple independent platforms, which can identify reliable molecular signals for personalized medicine.
COMPUTERS IN BIOLOGY AND MEDICINE
(2023)
Article
Chemistry, Multidisciplinary
Chun Qian, Qingshu Zheng, Jie Chen, Bo Tu, Tao Tu
Summary: Solid main-chain NHC-rhodium(i) polymers prepared by coordination assembly show high catalytic activity in the hydroaminomethylation of olefins, with significantly improved yields and linear selectivity. The catalyst also exhibits broad substrate scope and excellent recyclability, making it suitable for the synthesis of various pharmaceuticals.
Article
Chemistry, Physical
Daheng Wen, Qingshu Zheng, Siqi Yang, Haibo Zhu, Tao Tu
Summary: Gold catalysis has been hindered by the instability of catalysts. However, solid porous organometallic polymers (POMPs) produced through a direct knitting strategy have overcome this issue. POMPs exhibit enhanced stability and catalytic activity in sulfonylation and carboxylative cyclization reactions due to their hierarchical porous structure and well-preserved catalytic centers. Furthermore, the POMPs can be reused for more than 10 runs without significant loss of activity and selectivity.
JOURNAL OF CATALYSIS
(2023)
Article
Chemistry, Multidisciplinary
Le-Wei Shen, Yong Wang, Jiang-Bo Chen, Ge Tian, Kang-Yi Xiong, Christoph Janiak, David Cahen, Xiao-Yu Yang
Summary: Efficient and stable electrocatalysts are crucial for practical seawater splitting, and the nanocomposite of RuCoBO has been designed to meet these requirements. The study demonstrates that the calcinated RuCoBO-based nanocomposite (Ru2Co1BO-350) shows excellent catalytic activity, low cell voltage, and long-term stability for seawater splitting. The reconstructed surface of Ru2Co1BO-350 during the electrochemical reactions contributes to its high activity and stability, and it also exhibits strong resistance to Cl- corrosion. This research suggests a new strategy for the design of high-performance Ru-based electrocatalysts for seawater splitting.
Editorial Material
Chemistry, Multidisciplinary
Weiwei Fang, Tao Tu
SCIENCE CHINA-CHEMISTRY
(2023)
Article
Chemistry, Physical
Guangkuo Zeng, Jiajie Wu, Lingyun Shen, Qingshu Zheng, Zhe-Ning Chen, Xin Xu, Tao Tu
Summary: A selective and modular protocol was developed for the synthesis of quaternary alpha-hydroxyl acetates via dehydrogenative cross-coupling of 1,2-diols and primary alcohols using tris-N-heterocyclic carbene iridium complexes as catalysts and Ba(OH)2 as the base. The reaction involves the generation of byproducts water and hydrogen gas, and a proposed mechanism includes dehydrogenation of alcohols, aldol condensation, and 1,2-alkyl rearrangement reactions for the construction of the quaternary carbon center.
Review
Chemistry, Physical
Jie Ying, Jiang-Bo Chen, Yu-Xuan Xiao, Susana I. Cordoba I. de Torresi, Kenneth I. I. Ozoemena, Xiao-Yu Yang
Summary: This review summarizes recent developments in the field of Ru-based electrocatalysts for the oxygen evolution reaction (OER). The characteristics of Ru-based OER catalysts, such as the OER mechanism, intrinsic activity, and stability issue, are discussed. Recently reported Ru-related catalysts falling in the Ru metal and Ru compound subclasses are described, with a focus on activity/stability-enhancing strategies. Several challenges and future perspectives in this field are summarized. It is anticipated that this review will contribute to a better understanding of Ru-based OER catalysts and inspire new strategies for designing active and stable Ru-materials.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Biographical-Item
Chemistry, Multidisciplinary
Qiang Shi, Liping Cao, Yong Chen, Huanfang Guo, Yu Liu, Tao Tu, Feng Wang, Junli Wang, Leyong Wang, Yongshu Xie, Cheng Yang, Xin Zhao
CHINESE CHEMICAL LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Jian-Hong Liu, Tao Tu, Yu-Luo Shen, Bo Tu, Dong-Jin Qian
Summary: Metal-directed interfacial self-assembly of well-defined coordination polymer (CP) ultrathin films can control the metal complex arrangement and distribution at the molecular level, providing a convenient route for the design and fabrication of novel opto-electrical devices and heterogeneous catalysts.
Article
Chemistry, Multidisciplinary
Jie Ying, Zhen-Zhao He, Jiang-Bo Chen, Yu-Xuan Xiao, Xiao-Yu Yang
Summary: By elevating the d-band center, Fe-incorporated Ni3S2 nanosheets have been successfully prepared, showing outstanding oxygen evolution reaction (OER) performance under alkaline conditions. It only requires a 244 mV overpotential (a reduction of 210 mV compared to Ni3S2) at 50 mA cm-2 in 1 M KOH, and exhibits no significant degradation after a 60-hour test.
Article
Chemistry, Physical
Guangkuo Zeng, Lingyun Shen, Qingshu Zheng, Tao Tu
Summary: In this study, a palladium-catalyzed dehydrogenation-coupling-aromatization protocol was developed to access ortho-substituted phenols from cyclohexanols with primary alcohols. The method demonstrated broad substrate scope and resulted in clean byproducts of water and hydrogen gas. The ortho-mono- and ortho-disubstitutions could be readily controlled by N-heterocyclic carbene (NHC) ligands and the amount of base.
Article
Biochemical Research Methods
Jingyi Zhu, Jiangbo Chen, Mohammadreza Amjadian, Siyi Liang, Zheng Qu, Yue Wang, Yachao Zhang, Lidai Wang
Summary: Simultaneous photoacoustic (PA) and ultrasound (US) imaging provides rich optical and acoustic contrasts with high sensitivity, specificity, and resolution, making it a promising tool for diagnosing and assessing various diseases. To address the contradiction between resolution and penetration depth, a simultaneous dual-modal PA/US microscopy with an optimized acoustic combiner is presented.
BIOMEDICAL OPTICS EXPRESS
(2023)
Article
Optics
Xing-Yu Zhu, Tao Tu, Guang-Can Guo, Chuan-Feng Li
Summary: In this paper, a strategy for measuring the parity of two spin qubits using modulated pulses and a superconducting resonator as a detector is proposed. It is found that the distinction between spin-parity states can be achieved with high fidelity within a short measurement time, enabling the deterministic preparation of various spin entangled states. The method can also be applied to parity measurements and surface codes of multiple spin qubits. These results pave the way for fault-tolerant quantum computation with spin qubits.
Article
Engineering, Electrical & Electronic
Tianhui Xu, Jiangbo Chen, Likang Du, Chunyi Song, Qun Jane Gu, Zhiwei Xu
Summary: This letter presents an inverted complementary cross-coupled VCO implemented in a standard 28-nm CMOS technology to reduce its PN sensitivity to K-VCO. The proposed topology places the NMOS switching pairs on the top of PMOS pairs to minimize low-frequency noise up-conversion. This VCO achieves low PN at far offset frequency and a large continuous frequency tuning range, suitable for high-resolution millimeter-wave radar.
IEEE MICROWAVE AND WIRELESS TECHNOLOGY LETTERS
(2023)
