Review
Chemistry, Inorganic & Nuclear
Vladimir Ya. Lee
Summary: This review focuses on the chemistry of Schrock-type silylidene/germylidene complexes, discussing their synthesis, bonding nature, and specific reactivity, and categorizes them as Schrock-type silylene/germylene transition metal complexes based on spectroscopic, structural, and computational studies.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Ju Hyeon Jung, Hongjun Oh, Bonggeun Shong
Summary: As semiconductor devices shrink in size, understanding the fabrication processes at the molecular level is becoming more important. This study used computational chemistry methods to investigate the fluorination reactions of TiN, TiO2, and SiO2, and compared their surface reactivity for etching processes. The results showed that HF can etch these materials, producing TiF4 and SiF4 as byproducts. While the etching of TiO2 and SiO2 was suggested to be favorable, the reaction of TiN was thermodynamically hindered. This study provides theoretical insights into the fluorination reactivity of TiN and explores the etching selectivity between different materials, which is crucial for the ALE process conditions of TiN.
Article
Polymer Science
Matthew B. Houck, Timothy J. Fuhrer, Cole R. Phelps, Loren C. Brown, Scott T. Iacono
Summary: Polymer functionality plays a crucial role in determining key properties of materials, but the synthesis of functional polymers with defined molecular weights and compositions remains challenging. Perfluoroaromatic systems show promise for novel polymer architectures, but also have drawbacks such as chemical reversibility. Developing a strategy for stable monomer design and establishing functional criteria are essential for achieving the synthetic potential of these systems.
Article
Chemistry, Organic
Xia-Lin Wang, Nicholas Yiching Chiang, Jian-Jhih Peng, Lei Yu, Li-Jun Xu, Hau-Ren Yang, Bih-Yaw Jin, Pinglu Zhang, Yu-Ying Lai, Ze Li, Guo-Qiao Lai, Tien-Yau Luh
Summary: The Grubbs G-I or G-II catalyst forms a ruthenium ethoxy carbene complex, which catalyzes the ring-opening cross metathesis reaction to produce a diene with an ethoxy substituent. Various hydrocarbons can smoothly undergo this reaction, while tertiary amines, N-alkylimides, esters, and aryl or alkyl bromides remain intact.
JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Haoyu Li, Haodong Li, Zhiwei Yang, Liwen Yang, Jueying Gong, Yuxia Liu, Gongke Wang, Zhuo Zheng, Benhe Zhong, Yang Song, Yanjun Zhong, Zhenguo Wu, Xiaodong Guo
Summary: Silicon monoxide (SiO) has been identified as a promising anode material for lithium-ion batteries, but challenges such as poor cyclability, unsatisfactory electrical conductivity, and low initial Coulombic efficiency persist. The review summarizes the preparation processes, microstructure, lithiation mechanism, and electrochemical properties of SiOx, as well as introduces modifications to address these challenges. Additionally, the advantages and disadvantages of various SiOx anode materials are analyzed, providing possible directions for practical applications.
Article
Polymer Science
Mia Mesic, Tin Klacic, Anze Abram, Klemen Bohinc, Davor Kovacevic
Summary: This study examined the effects of substrate type on the formation process and properties of polyelectrolyte multilayers. It was found that multilayers formed on silicon and titanium substrates have different thicknesses, structures, and surface roughness. Additionally, the hydrophobicity of the substrate also plays an important role in the formation process and properties of the multilayers.
Article
Chemistry, Medicinal
Hung-Yi Lin, Shih-Ying Chang, Huang-Yi Li, Chia-Chun Cheng, Chih-Kuang Chuang, Hsiang-Yu Lin, Shuan-Pei Lin, Wei-Chieh Cheng
Summary: This study describes the synthesis of L-iduronic acid (IdoA)-and imino-IdoA-typed C-glycosides for modulating alpha-L-iduronidase (IDUA) activity. The IdoA-typed C-glycosides showed greater potency than the imino-IdoA analogs in enzyme inhibition studies, with the most potent C-glycoside 27c exhibiting an IC50 value of 1 μM. Co-treatment of 12 with rh-alpha-IDUA in mucopolysaccharidosis type I (MPS I) fibroblasts resulted in a significant increase in IDUA activity and reduction of accumulated heparan sulfate (HS), indicating the feasibility and promise of small molecules as rh-alpha-IDUA stabilizers for improving enzyme replacement therapy (ERT) efficacy in MPS I.
EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY
(2023)
Article
Chemistry, Applied
Akhil K. Sivan, Chinnappan Sivasankar
Summary: Investigation was conducted on the synthesis of NH3 and NH2NH2 from dinitrogen using Os-triamidoamine (1(N)) and Os-triamdiophosphine (1(P)) complexes as catalysts under ambient reaction conditions. The FLP-H-2 was used as a co-catalyst in this study, releasing H+ and H-,(-) to yield desired products with feasible energy barriers. The proposed catalytic cycle successfully produced NH3 and N2H4 under viable conditions, with [Os{(NHCH2CH2)(3)P}] catalyst showing better performance for ammonia formation compared to [Os{(NHCH2CH2)(3)N}] catalyst. This study opens a new path for the future usage of these osmium metal complexes as catalysts for nitrogen reduction reactions (NRRs).
APPLIED ORGANOMETALLIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Tianhao Yao, Hongkang Wang, Xin Ji, Deyu Wang, Qingmiao Zhang, Lingjie Meng, Jian-Wen Shi, Xiaogang Han, Yonghong Cheng
Summary: Titanium dioxide (TiO2) is a promising anode material for sodium-ion batteries (SIBs) but suffers from slow ion transferability and poor conductivity. To overcome these drawbacks, a facile strategy has been developed to engineer the lattice defects and microstructure of TiO2-based anode, resulting in enhanced sodium storage performance.
Review
Materials Science, Multidisciplinary
Zhongmin Shen, Jing Guo, Shengchao Duan, Hanjie Guo, Ran Duan, Shuo Huang
Summary: A thermodynamic model based on the ion and molecule coexistence theory is established for the slag-metal equilibrium reactions between the GH4706 alloy melt and the CaO-MgO-Al2O3-TiO2-CaF2-FeO-SiO2 slag during electroslag remelting process. It is confirmed that Ni and Fe should be regarded as the matrix in Ni-based superalloys, and reasonable activity coefficients of Al and Ti can be obtained using the first-order Wagner equation with suitable values of activity interaction coefficients. The results show that a local equilibrium state is reached between Al2O3 in the test slag system and Ti. The slag composition contains a FeO mass fraction of lower than 0.20% and a TiO2 content ranging between 2.00 and 6.00%. Furthermore, the optimized slag systems are successfully applied in an industrial trial, and the losses for Al and Ti elements within the ingot are determined to be lower than 10%.
Article
Chemistry, Multidisciplinary
Xia Huang, Jiayong Tang, Tengfei Qiu, Ruth Knibbe, Yuxiang Hu, Tobias U. Schulli, Tongen Lin, Zhiliang Wang, Peng Chen, Bin Luo, Lianzhou Wang
Summary: A new type of ultrathin carbon-wrapped titanium nitride nanomesh was successfully prepared using a designed nano-confinement topochemical conversion strategy, showing outstanding electrocatalytic performance for lithium-sulfur batteries. The material offers plentiful exposed active sites and rapid charge transfer, resulting in excellent rate capabilities and high peak areal capacity. This work provides a new avenue for the facile and controllable fabrication of 2D non-layered materials with impressive electrocatalysis for various energy technologies.
Article
Nanoscience & Nanotechnology
Ehsan Ghasali, Davoud Ghahremani, Yasin Orooji
Summary: Ti laminated composites were successfully prepared by using metallic additive powders between Ti sheets and spark plasma sintering process. Different metallic additives such as Mo, Cr, Si, and Co were inserted between Ti layers to form unique composite structures, resulting in varied mechanical properties. The highest Vickers hardness and bending strength were observed in Ti-Si and Ti-Cr laminated composites, respectively, indicating the potential for tailored performance through appropriate additive selection.
JOURNAL OF SCIENCE-ADVANCED MATERIALS AND DEVICES
(2021)
Article
Chemistry, Multidisciplinary
Didier Astruc
Summary: This review summarizes various areas of inorganic chemistry based on the themes developed by our research group in the past four decades. It focuses on the electronic structure of iron sandwich complexes and their reactivities as reducing and oxidizing agents, redox and electrocatalysts, and precursors of dendrimers and catalyst templates. The review explores electron-transfer processes, the influence of redox state on ligand acidity, and the functionalization of dendrimers using cross olefin metathesis reactions. It also discusses mixed and average valence complexes, stereo-electronic aspects, dendritic redox sensing, and the use of dendrimers as templates for catalysis.
CHEMICAL COMMUNICATIONS
(2023)
Article
Plant Sciences
Urvashi Mittal, Vijay Kumar, Sarvjeet Kukreja, Baljeet Singh, Narendra Kumar Pandey, Umesh Goutam
Summary: Plants are affected by abiotic and biotic stresses, but they can cope with these stresses by utilizing beneficial elements. These elements promote plant growth and enhance their responses to stressors and environmental stimuli. Therefore, beneficial elements play a significant role in dealing with climate change and improving plant productivity under restrictive conditions.
JOURNAL OF PLANT GROWTH REGULATION
(2023)
Article
Chemistry, Physical
Honglin Zhang, Junjun Wang, Weijiu Huang, Linqing Wang, Zhibin Lu
Summary: Peeling is a major technical obstacle for coating applications, and the interfacial properties of the coating and substrate are crucial in the peeling process. This study investigates the adhesion work, electronic structure, crystal orbital Hamilton population, and tensile strength of Ti/Si and TiO2/Si interfaces using first-principles calculations. The results show that the Ti/Si interface has stronger bonding than the TiO2/Si interface, and the oxidation of Ti weakens the interface bonding. The tensile strength is a good indicator of bond strength, and the fracture of the interfaces occurs inside the material rather than at the interface.
SURFACES AND INTERFACES
(2022)
