Article
Chemistry, Inorganic & Nuclear
Crist N. Filer, Joseph R. Andrews, Scot Pounds, Giliyar Ullas
Summary: This study presents an efficient method for radiolabeling several dopamine D-2 receptor agonists with tritium at high specific activity.
APPLIED RADIATION AND ISOTOPES
(2021)
Article
Chemistry, Inorganic & Nuclear
Crist N. Filer, Scot Pounds, Christopher Wright
Summary: This paper describes the synthesis and characterization of bisphenol A and several closely associated derivatives using (14)C and tritium labeling.
APPLIED RADIATION AND ISOTOPES
(2022)
Article
Chemistry, Physical
Ilya V. Yakovlev, Vladimir I. Zaikovskii, Mariya A. Kazakova, Evgeniy S. Papulovskiy, Olga B. Lapina, Jean-Baptiste d'Espinose de Lacaillerie
Summary: In this study, the influence of strong metal-support interaction on two metastable alumina phases, y-Al2O3 and X-Al2O3, was investigated using 59Co Internal Field NMR and high-resolution transmission electron microscopy. It was found that the metallic particles supported on X-Al2O3 were larger and contained more active hcp phase, while those on y-Al2O3 were smaller. The presence of hydroxyl groups on y-Al2O3 facilitated the dispersion of Co precursor, leading to the formation of smaller metal Co nanoparticles.
JOURNAL OF CATALYSIS
(2023)
Article
Chemistry, Organic
Se Yeon Park, Jaehwan Kim, Haye Min Ko
Summary: An efficient chemoselective reduction of isatin derivatives has been achieved using B(C6F5)3 catalyst, benzyldimethylsilane, and H2O. Importantly, a small amount of water has been found to be a highly effective reaction promoter, reducing both the reaction time and temperature for the synthesis of indolin-3-ones. Furthermore, excellent deuterium incorporation has been achieved by catalytic alpha-deuteration of indolin-3-ones using B(C6F5)3 and D2O.
JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Yaewon Kim, Hamidreza Samouei, Christian Hilty
Summary: In this study, polymerization reactions of propene, 1-butene, and isobutene catalyzed by a specific catalyst were characterized using in situ NMR. The dissolved gases were hyperpolarized using the DNP technique, allowing for the observation of reaction kinetics and product formation. The study also revealed the impact of catalyst concentration and reaction time on the monomer signals, indicating a rapid binding and unbinding process during the reactions.
Article
Nanoscience & Nanotechnology
Turkan Gamze Ulusoy Ghobadi, Yusuf Kocak, Ahsan Jalal, Yagmur Altinkaynak, Gulsah Celik, Tolga Semiz, Cihan Cakir, Bayram Butun, Ekmel Ozbay, Ferdi Karadas, Emrah Ozensoy
Summary: The storage of deuterium (D-2(g)) in Pd-coated Ti ultra-thin films at low pressures is fine-tuned by controlling the thicknesses of the Pd overlayer, Ti ultra-thin film domain, D-2(g) pressure, exposure duration, and film temperature. The structural properties of the Ti/Pd nanofilms are studied through various techniques to explore structure-functionality relationships. The optimized D-storage parameters and strategies are also applied to a betavoltaic battery device, showing promising performance.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Hyun-goo Kang, Dong -you Chung, Sei-hun Yun, Pil -Kap Jung, Jae-Uk Lee, Min Ho Chang
Summary: Metal hydride beds are essential components for handling and processing tritium gases in nuclear fusion machines. Korea has been focusing on developing metal hydride beds with robustness, reliability, and longevity. In this study, an improved uranium hydride bed was designed and an experimental bed was fabricated for investigating hydrogen and deuterium absorption characteristics. The experimental results will serve as the basis for the development of operation modes and performance references for uranium hydride beds in the fusion fuel cycle.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Review
Chemistry, Multidisciplinary
Florian Zoller, Sebastian Haeinger, Daniel Boehm, Jan Luxa, Zdenek Sofer, Dina Fattakhova-Rohlfing
Summary: This review focuses on recent advances in carbon-based OER catalysts, including various structures such as pure carbon allotropes, heteroatom-doped carbonaceous materials, and carbon/transition metal compounds. The review not only introduces the structural and compositional origin of electrochemical activity but also discusses the mechanism of catalytic activity, stability under OER conditions, and potential synergistic effects with metal co-catalysts.
Article
Chemistry, Multidisciplinary
Ying-Qi Zhang, Yang-Bo Chen, Ji-Ren Liu, Shao-Qi Wu, Xin-Yang Fan, Zhi-Xin Zhang, Xin Hong, Long-Wu Ye
Summary: The use of chiral Bronsted acids in catalytic asymmetric synthesis enables the direct activation of alkynes, leading to the construction of valuable spirocyclic enones and 2H-pyrroles with high yields and excellent enantioselectivity. This activation mode is expected to be widely applicable in catalytic asymmetric reactions involving ynamides and related heteroatom-substituted alkynes.
Article
Chemistry, Physical
Nathan J. Szymanski, Yan Zeng, Tyler Bennett, Shripad Patil, Jong K. Keum, Ethan C. Self, Jianming Bai, Zijian Cai, Raynald Giovine, Bin Ouyang, Feng Wang, Christopher J. Bartel, Raphaele J. Clement, Wei Tong, Jagjit Nanda, Gerbrand Ceder
Summary: In this study, we designed and tested several synthesis routes for a highly fluorinated DRX cathode and rationalized each route using thermochemical analysis. Through a suite of characterization techniques, we advanced the understanding of oxyfluoride synthesis and proposed metastable synthesis techniques for future work.
CHEMISTRY OF MATERIALS
(2022)
Review
Chemistry, Applied
Sara Meninno, Francesca Franco, Maurizio Benaglia, Alessandra Lattanzi
Summary: Pyrazoleamides have gained attention as reactive and practical surrogates in asymmetric catalysis, particularly in a variety of metal- and organocatalytic transformations. Their relevance has extended to photoredox catalysis and challenging stereoselective bond-forming reactions in recent years.
ADVANCED SYNTHESIS & CATALYSIS
(2021)
Article
Chemistry, Physical
Samer Gnaim, Julien C. Vantourout, Fabien Serpier, Pierre-Georges Echeverria, Phil S. Baran
Summary: The article discusses the strong parallel between simple alcohol oxidation and carbonyl desaturation, highlighting recent advances in carbonyl desaturation over the past 5 years using both transition-metal-catalyzed and metal-free approaches. Through historical overview and detailed examination of new developments, the ideal context for a catalytic strategy to emerge is explored.
Review
Chemistry, Multidisciplinary
Qian-Yu Li, Yuhang He, Yu-Mei Lin, Lei Gong
Summary: Photo-induced methylation is a valuable method for introducing methyl groups into organic molecules, especially in pharmaceutical chemistry. This article provides a comprehensive review of photochemical strategies for direct and selective methylation of different types of C-H bonds. These advancements are expected to drive progress in organic synthesis, photocatalysis, and pharmaceutical development.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Christian Schroeder, Stacey Zones, Michael Ryan Hansen, Hubert Koller
Summary: The zeolite catalyst SSZ-42 exhibits a high abundance of hydrogen-bonded Bronsted acid sites, with the classification and diversity of hydrogen bonding affecting chemical shifts. The alignment of oxygen atoms is expected to impact their role in catalytic reactions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Applied
Carmine D'Agostino, Sarayute Chansai, Lynn F. Gladden, Christopher Hardacre
Summary: NMR relaxation time ratio T-1/T-2 is used to characterize the strength of surface interaction of reducing agent species in Ag/Al2O3 catalysts for SCR of NOx. The interaction strength plays a crucial role in determining catalyst performance and initial activation, with different reducing agents showing varying affinities with the catalyst.
