Article
Chemistry, Organic
Mingyeong Jang, Taeho Lim, Byoung Yong Park, Min Su Han
Summary: This study presents a metal-free and highly chemoselective method for the reduction of aromatic nitro compounds, using tetrahydroxydiboron as the reductant. The reaction can be completed within 5 minutes at room temperature and selectively converts nitroarenes with sensitive functional groups into anilines.
JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Shuya Li, Saerona Kim, Andrew H. Davis, Jingshun Zhuang, Eric Wolfgang Shuler, Debora Willinger, Jae-Joon Lee, Weiwei Zheng, Benjamin D. Sherman, Chang Geun Yoo, Gyu Leem
Summary: Selective cleavage of C-C bonds in lignin at ambient temperature was achieved using a HAT-DSPEC system, which combines a dye-sensitized photoelectrochemical cell with a hydrogen atom transfer mediator under redox-neutral conditions. The system demonstrated excellent efficiency and selectivity in the cleavage of the C(aryl)-C(alkyl) bond under solar irradiation.
Article
Engineering, Chemical
Jingjing Zhou, Hong Sui, Jun Ma, Xingang Li, Nabil H. A. Al-Shiaani, Lin He
Summary: The researchers have developed a novel amphiphilic magnetic demulsifier that can efficiently separate oil-water emulsions in a short period of time, showing promising applications in various industrial and environmental processes.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Multidisciplinary Sciences
Hariom Jani, Jheng-Cyuan Lin, Jiahao Chen, Jack Harrison, Francesco Maccherozzi, Jonathon Schad, Saurav Prakash, Chang-Beom Eom, A. Ariando, T. Venkatesan, Paolo G. Radaelli
Summary: In the quest for post-CMOS technologies, researchers have shown promising results in experimenting with topologically protected ferromagnetic whirls such as skyrmions and their anti-particles, which can serve as solitonic information carriers. Antiferromagnetic analogues have become the subject of intense focus due to their predicted relativistic dynamics and potential for fast deflection-free motion and size scaling, although experimental demonstration in natural antiferromagnetic systems has yet to be achieved. By utilizing a first-order analogue of the Kibble-Zurek mechanism, a family of topological antiferromagnetic spin textures has been stabilized on an Earth-abundant oxide insulator, showing potential for low-energy antiferromagnetic spintronics at room temperature.
Article
Nanoscience & Nanotechnology
O. J. Amin, S. F. Poole, S. Reimers, L. X. Barton, A. Dal Din, F. Maccherozzi, S. S. Dhesi, V. Novak, F. Krizek, J. S. Chauhan, R. P. Campion, A. W. Rushforth, T. Jungwirth, O. A. Tretiakov, K. W. Edmonds, P. Wadley
Summary: Researchers have discovered that topological spin textures can be generated and moved at room temperature using electrical pulses in the semimetallic antiferromagnet CuMnAs, which is a testbed system for spintronic applications. This finding is crucial for realizing the full potential of antiferromagnetic thin films as active components in high-density, high-speed magnetic memory devices.
NATURE NANOTECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Ming-dong Hou, Xiang-wen Zhou, Bing Liu
Summary: This study examines the stress corrosion behavior of beryllium oxide (BeO) in a water environment at room temperature. Both flexural strength tests and Vickers hardness tests were conducted, indicating a significant decrease in BeO strength in the water environment. Analysis using TOF-SIMS and molecular dynamics simulations revealed the mechanism of stress corrosion in BeO at room temperature. The findings of this study have practical implications for further research on stress corrosion of BeO at higher temperatures.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Jie Ding, Fuhua Li, Jincheng Zhang, Haifeng Qi, Zhiming Wei, Chenliang Su, Hong Bin Yang, Yueming Zhai, Bin Liu
Summary: This study reports an atomic catalyst, Ir1P1/NPG, with asymmetric IrN2P1 sites, which exhibits excellent activity and selectivity in the hydrogenation reaction. The P site in Ir1P1/NPG binds nitrostyrene, while the neighboring Ir site activates H2 to reduce the nitro group, achieving chemoselective hydrogenation.
ADVANCED MATERIALS
(2023)
Article
Engineering, Mechanical
Vitor Nascimento, Caina Bemfica, Emmanuel Fessler, Jose Alexander Araujo, Fabio Castro
Summary: This study investigates the effects of high temperature on the fatigue behavior of forged Inconel 718 under axial/torsional loading conditions. The results show that the fatigue lives at high temperature were longer compared to room temperature tests. The torsion tests exhibited the longest fatigue lives. The cyclic plasticity model proposed in this study successfully described the stress-strain behavior of the material under different loading conditions and temperatures.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2022)
Article
Multidisciplinary Sciences
Donghai Li, Chiara Trovatello, Stefano Dal Conte, Matthias Nuss, Giancarlo Soavi, Gang Wang, Andrea C. Ferrari, Giulio Cerullo, Tobias Brixner
Summary: Research on exciton-phonon coupling in single-layer transition metal dichalcogenides has shown stronger coupling compared to most other inorganic semiconductor nanostructures. Utilizing two-dimensional micro-spectroscopy, the study provides a unique tool to measure the characteristics of exciton-phonon coupling and design-relevant parameters for the development of optoelectronic devices.
NATURE COMMUNICATIONS
(2021)
Article
Physics, Applied
Li-Da Chen, Li-Huai Shu, Bi Hui Zhang, Lin Liu, Lin Lei, Ye Shao, Feng-Zhen Huang, Yang-Yang Lv, Zhen-Xiang Cheng, Jian-Li Wang, G. A. Stewart, J. M. Cadogan, W. D. Hutchison, Jian Zhou, Xiao Qiang Liu, Shu-Hua Yao, Y. B. Chen, Yan-Feng Chen
Summary: We grew (Sr, Ca) Nd2Fe2O7 single crystals with the Ruddlesden-Popper structure using an optical floating-zone method. A significantly anisotropic magneto-dielectric effect (MD) was observed in a SrNd2Fe2O7 crystal at room temperature, with ab-plane and c-axial MD coefficients reaching -12.3% and -8.4% in a 1 T magnetic field. The anisotropic MD effect decreased with an increase in Ca concentration and eventually disappeared. The anisotropic MD effect in SrNd2Fe2O7 crystals can be attributed to polaronic hopping between neighboring Fe3+ ions through oxygen vacancies in an anisotropically antiferromagnetic matrix.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Mariko Morimoto, Wendy Cao, Robert G. Bergman, Kenneth N. Raymond, F. Dean Toste
Summary: Supramolecular catalysts can achieve large rate accelerations and precise selectivity under mild and aqueous conditions, but their applications in chemoselective and site-selective modification of complex biomolecules are still largely unexplored.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Abha Sharma, Alexis Traynor-Kaplan, Gerald H. Pollack
Summary: Previously, it was discovered that water adjacent to hydrophilic substances excludes solutes and forms a fourth phase of water known as the exclusion zone (EZ). This study extracted and characterized EZ water formed on three different surfaces, and verified its presence in solid form. Mass spectroscopy confirmed the absence of ionizable contaminants that could reproduce the characteristic EZ spectra. Therefore, solid EZ water may exist at room temperature.
ARABIAN JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Organic
Balu Ramesh, Masilamani Jeganmohan
Summary: This paper describes a Co(III)-catalyzed regio- and chemoselective redox-neutral C-H annulation of arylamides/acrylamides with 1,3-dienes. The reaction is well-suited for less-reactive 1,3-butadiene and enables the synthesis of pharmaceutically important 3,4-dihydroisoquinolinones in good yields. The prepared 3,4-dihydroisoquinolinones can then be converted into highly important oxirane derivatives in good yields. A plausible mechanistic cycle is proposed and supported by a competition experiment and kinetic isotopic effect (KIE) studies.
JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Green & Sustainable Science & Technology
Yichen Liu, Yue Wang, Xing Fu, Qiuxing Li, Wenli Wang, Changwei Hu
Summary: Room temperature pretreatment of pubescens with soaking in MgCl2 aqueous solution at different concentrations resulted in higher conversion rates of hemicellulose and lignin with 20 wt% MgCl2 solution. MgCl2 pretreatment may change the dissolution conversion mechanism of pubescens and promote the breakage of ether linkage, leading to the formation of a new monophenol. Furthermore, GPC analysis revealed a decrease in larger compounds and an increase in smaller compounds compared to pure water pretreatment.
Article
Nanoscience & Nanotechnology
Jun Utsumi, Ryo Takigawa
Summary: The study focused on surface activated bonding (SAB) of Al2O3 films deposited by chemical vapor deposition at room temperature under short-time activated conditions. The crystallinity of Al2O3 film affects its bonding properties, and the surface energy for bonding of Al2O3 film/sapphire is higher compared to other bondings.
SCRIPTA MATERIALIA
(2021)
Article
Chemistry, Organic
Nicholas A. Isley, Roscoe T. H. Linstadt, Sean M. Kelly, Fabrice Gallou, Bruce H. Lipshutz
Article
Chemistry, Organic
Sean M. Kelly, Chong Han, Laura Tung, Francis Gosselin
Article
Chemistry, Applied
Chong Han, Lady Mae Alabanza, Sean M. Kelly, Douglas L. Orsi, Francis Gosselin, Ryan A. Altman
ORGANIC PROCESS RESEARCH & DEVELOPMENT
(2019)
Article
Chemistry, Organic
Nicholas Wong, Filip Petronijevic, Allen Y. Hong, Xin Linghu, Sean M. Kelly, Haiyun Hou, Theresa Cravillion, Ngiap-Kie Lim, Sarah J. Robinson, Chong Han, Carmela Molinaro, C. Gregory Sowell, Francis Gosselin
Article
Chemistry, Applied
Sean M. Kelly, Rene Lebl, Thomas C. Malig, Thomas M. Bass, Dominique Kummli, Dainis Kaldre, Ugo Orcel, Lars Trondlin, David Linder, Joerg Sedelmeier, Stephan Bachmann, Chong Han, Haiming Zhang, Francis Gosselin
Summary: This study reports the development of a scalable continuous flow process for synthesizing a densely functionalized quinazoline organozinc intermediate. The underlying component reaction kinetics in batch mode were investigated using PAT, followed by process modeling to develop a practical continuous flow process. Challenges related to reactor fouling were addressed through the combination of plug flow and continuous stirred tank reactors. The initial laboratory proof-of-concept experiments successfully scaled up to a multikilogram level, with excellent yield and performance in subsequent reactions.
ORGANIC PROCESS RESEARCH & DEVELOPMENT
(2023)
Article
Chemistry, Organic
SH Hu, S Kelly, S Lee, J Tao, E Flahive
