Cathleen Crudden’s research group focuses on catalysis, chirality and materials chemistry. In particular, they are interested in developing new reactions to prepare compounds of interest to the pharmaceutical industry, specifically reactions that are enantioselective or enantiospecific. Alternating current generators, typically referred to as AC generators, generally work on the same principle as direct current generators.The basic function of a generator is to co...View the Editorial Board for the ACS Catalysis and get contact information for associated members. Pair your accounts. ... on references in your Mendeley library. Pair your accounts. Export articles to Mendeley. Get article recommendations from ACS based on references in your Mendeley library. You’ve supercharged your research process with ...When you’re in the market for an air conditioning unit (AC) you should be aware that all HVAC brands are not equal in quality and reliability. This guide highlights four AC brands ...Oct 19, 2020 · The electrocatalytic reduction of carbon dioxide (CO2) by means of renewable energies is widely recognized as a promising approach to establish a sustainable closed carbon cycle economy. However, widespread application is hampered by the inherent difficulty in suppressing the hydrogen evolution reaction and controlling the overall process selectivity. Further critical parameters are the ... Codesignal is an online platform that helps employers assess the coding skills of potential candidates. It is a great way to quickly and accurately evaluate a candidate’s coding ab...Hydrogen is important because it is involved in the process of enzyme catalysis and because it stabilizes things like nucleic acids and proteins. Hydrogen bonds with many different...Apr 9, 2020 · ACS Catalysis (2018), 8 (4), 3091-3103 CODEN: ACCACS; ISSN: 2155-5435. ( American Chemical Society ) A versatile, selective, and recyclable heterogeneous catalytic method for the methylation of C-H bonds in alcs., ketones, and indoles with methanol under oxidant-free conditions using a Pt-loaded carbon (Pt/C) catalyst in the presence of NaOH is ... Professor Mary P. Watson from the University of Delaware is the 2023 ACS Catalysis Lectureship winner for her innovative and impactful contributions to …Herein, we disclose a Ni-catalyzed 1,1-difunctionalization of unactivated terminal alkenes that enables the incorporation of two different heteroatom motifs across an olefin backbone, thus streamlining the access to α-aminoboronic acid derivatives from simple precursors. The method is characterized by its simplicity and generality across a …The persistently increasing energy consumption and the low abundance of conventional fuels have raised serious concerns all over the world. Thus, the development of technology for clean-energy production has become the major research priority worldwide. The globalization of advanced energy conversion technologies like rechargeable metal–air …Mar 1, 2022 · Dual-metal-site catalysts (DMSCs) have emerged as a frontier in heterogeneous catalysis, while the underlying relationships connecting their dual-site synergistic effects on catalytic performance remain unclear. Here we present a comprehensive first-principles study of O2 activation and CO oxidation on a series of N-coordinated DMSCs. We discovered that the N3-coordinated-adjacent dual-metal ... This material is available free of charge on the ACS Publication Web site at The Supporting Information is available free of charge on the ACS Publications website at DOI: 10.1021/acscatal.7b04150.. Descriptions of intermediate formation in the two pathways, details of microkinetic modeling calculations, reactants, intermediates, and products …Abstract. Reducing CO 2 is a challenging chemical transformation that biology solves easily, with high efficiency and specificity. In particular, formate dehydrogenases are of great interest since they reduce CO 2 to formate, a valuable chemical fuel and hydrogen storage compound. The metal-dependent formate dehydrogenases of prokaryotes can ...Dual-metal-site catalysts (DMSCs) have emerged as a frontier in heterogeneous catalysis, while the underlying relationships connecting their dual-site synergistic effects on catalytic performance remain unclear. Here we present a comprehensive first-principles study of O2 activation and CO oxidation on a series of N …The imine reductase AoIRED from Amycolatopsis orientalis (Uniprot R4SNK4) catalyzes the NADPH-dependent reduction of a wide range of prochiral imines and iminium ions, predominantly with (S)-selectivity and with ee’s of up to >99%. AoIRED displays up to 100-fold greater catalytic efficiency for 2-methyl-1-pyrroline (2MPN) compared to other IREDs, …Are you preparing for the RSCIT exam? Want to boost your chances of success on the online test? Look no further. In this article, we will provide you with some valuable tips and tr...Understanding the molecular basis for controlled H2O2 activation is of fundamental importance for peroxide-driven catalysis by metalloenzymes. In addition to O2 activation in the presence of stoichiometric reductants, an increasing number of metalloenzymes are found to activate the H2O2 cosubstrate for oxidative transformations …The AC Hotel Alicante, just outside the city center, checks all the boxes for modern decor, comfort, and service at an affordable price. We may be compensated when you click on pro...Catalysis is crucial to the successful conversion of carbon dioxide into value-added products. Here, we provide a review on chemical and biological systems for carbon dioxide conversion directed toward the readers of ACS Catalysis, which focuses on providing a general perspective on the field, rather than technical details. We discuss …Selective oxidation of H2S to sulfur is an efficient process for industrial applications and environmental requirement to reduce the residual H2S in the Claus technology to an ultralow content (<0.1 ppm) before releasing the off-gas into the atmosphere. Recently, numerous research studies have been devoted to the development of highly active, selective and …ACS Catalysis (2016), 6 (12), 8239-8247 CODEN: ACCACS; ISSN: 2155-5435. (American Chemical Society) The electrochem. redn. of carbon dioxide (CO2) to ethanol (C2H5OH) and ethylene (C2H4) using renewable electricity is a viable method for the prodn. of these com. vital chems. Copper (Cu) and its oxides are by far the most effective ...ACS Catalysis 2024, Article ASAP. Qun Li, Wenyu Zhou, Chunyan Deng, Chenyang Lu, Peng Huang, Dong Xia, Luxi Tan, Cailong Zhou, Yong-Wei Zhang, Lichun Dong. Hydroxyl-Decorated Pt as a Robust Water …This article describes the discovery and development of a palladium-catalyzed asymmetric C–H olefination of 2-hydroxybiaryls. The strategy allows a direct assembly of optically active, axially chiral 2-substituted-2′-hydroxybiaryls from readily available precursors and demonstrates that the native hydroxy unit of the substrates can work as an efficient directing group for the C–H ... Aug 5, 2022 · Here, we proposed a computation-driven strategy to optimize structures of enzymes via simulation-based iterative saturation mutagenesis (ISM), aiming to stabilize the spatial effects of the TS with a TSA as a placeholder. This approach was applied to redesign structures of chitinase in order to increase its catalytic activity. After three ... Whether you’re good at taking tests or not, they’re a part of the academic life at almost every level, from elementary school through graduate school. Fortunately, there are some t...Abstract. Reducing CO 2 is a challenging chemical transformation that biology solves easily, with high efficiency and specificity. In particular, formate dehydrogenases are of great interest since they reduce CO 2 to formate, a valuable chemical fuel and hydrogen storage compound. The metal-dependent formate dehydrogenases of prokaryotes can ...Further oxidation of the complex forms {Ru V (O) (t5a-κ-N 2 O) (py) 2 } ( 2V (O) (κ-N 2 O)), which is a very efficient water oxidation catalyst, reaching a TOF MAX value of 9400 s –1 at pH 7.0, as measured via foot of the wave analysis. The key to fast kinetics for the catalytic oxidation of water to dioxygen by 2V (O) (κ-N 2 O) is due not ...The Ace Hotel New York is back after being shut down for over a year due to the pandemic. Here's one travel journalist's review of a recent stay. I've been a fan of the Ace Hotel b...1,3,4-Oxadiazolines can be activated by triplet energy transfer catalysis under visible-light irradiation. The generated carbenes react with electron-poor olefins, giving valuable spirocyclopropanes. Mechanistic investigations, both theoretical and experimental, uncover plausible pathways and highlight the importance of the triplet energy transfer steps. View …Heteroatom doping can facilitate intrinsic activity via the tuning of electronic states. However, it is still rare to elucidate the role of a specific metal sulfide electronic state and simultaneously enhance the CO2 electroreduction reaction (CO2RR) stability. SnS is well-known for its ability to produce HCOOH; however, its long-term operational stability …The synthesis of steroid drugs by multistage modifications of the steroidal core is challenging since site-specific and selective modification is essentially required, which is often difficult or complicated for chemocatalysis. For example, the synthesis of Trenbolone (3), a versatile anabolic–androgenic steroid, relies on a four-step chemical …Mar 1, 2022 · Dual-metal-site catalysts (DMSCs) have emerged as a frontier in heterogeneous catalysis, while the underlying relationships connecting their dual-site synergistic effects on catalytic performance remain unclear. Here we present a comprehensive first-principles study of O2 activation and CO oxidation on a series of N-coordinated DMSCs. We discovered that the N3-coordinated-adjacent dual-metal ... Artificial enzymes, usually created by incorporating one or two abiological catalytic species into protein hosts, are becoming promising tools for biocatalysis. However, they are still far behind natural enzymes due to their limited active sites with low activity and selectivity. Here, we proposed a polymeric approach to generate artificial enzymes by …ACS Publications uses CrossCheck's iThenticate software to detect instances of similarity in submitted manuscripts. Your manuscript may be screened for similarity to published material. Learn more. Manuscripts must be submitted through the ACS Paragon Plus Environment. Please review the Author Guidelines before beginning your manuscript submission. Constructing highly active photocatalysts with rich reactive sites for photofixation of CO2 with organic compounds implements an environmentally friendly route for CO2 valorization and carbon neutralization. Herein, we report the isolated cobalt (Co) single-atom (SA)-decorated two-dimensional (2D) single-layer ZnIn2S4 (ZIS) nanosheet …To highlight some of the many contributions that helped to catapult ACS Catalysis to becoming one of the premier catalysis journals, we have overviewed …Fischer-Tropsch synthesis (FTS) provides a nonpetroleum route for the production of value-added α-olefins from syngas. However, regulating the product distribution to promote the formation of long-chain α-olefins while maintaining low selectivity to C1 byproducts (CO2 and CH4) remains a great challenge. Herein, a series of alkali …The latest published issue of ACS Catalysis. See all articles . Interfacial Spontaneous Reduction Strategy to Synthesize Low-Valent Pt Single-Atom Catalyst for Boosting …Developing active, selective, and energy efficient heterogeneous catalytic processes is key to a sustainable future because heterogeneous catalysis is at the center of the chemicals and energy industries. The design, testing, and implementation of robust and selective heterogeneous catalytic processes based on insights from fundamental studies …ACS Catalysis 2022, 12, 18, 11002-11014 (Research Article) ACS Editors' Choice® is a collection designed to feature scientific articles of broad public interest. Read the latest articlesSep 4, 2020 · This graphic illustrates the importance of photocatalysis to tackle clean energy and environmental problems for establishing a balance that sustains life on earth. Perovskite oxide-based photocatalysts have shown promising potential and their horizon is not far off. View the article. We report here selective reduction of CO to acetate using Cu–Pd bimetallic electrocatalysts. High activity and selectivity are demonstrated for CO-to-acetate conversion with >200 mA/cm 2 in geometric current density and >65% in Faradaic efficiency (FE). An asymmetrical C–C coupling mechanism is proposed to explain the composition …I am pleased to introduce the inaugural issue of ACS Catalysis, the new interdisciplinary catalysis journal published by ACS. With this first …When it comes to installing a new AC unit, many homeowners focus solely on the upfront cost of the equipment itself. However, there are several hidden costs associated with a new A...Electrochemical reduction of CO2 to produce fuels and chemicals is one of the most valuable approaches to achieve a carbon-neutral cycle. Recently, a diversity of catalysts have been developed to improve their intrinsic activity and efficiency. However, the dynamic evolution process and the in situ construction behavior of electrocatalysts under …When you’re in the market for an air conditioning unit (AC) you should be aware that all HVAC brands are not equal in quality and reliability. This guide highlights four AC brands ...Here, we proposed a computation-driven strategy to optimize structures of enzymes via simulation-based iterative saturation mutagenesis (ISM), aiming to stabilize the spatial effects of the TS with a TSA as a placeholder. This approach was applied to redesign structures of chitinase in order to increase its catalytic activity. After three ...The enantioselective reduction of enamides is an efficient and atom-economical way to construct chiral amine motifs. In contrast to transition-metal complex based asymmetric hydrogenation, an alternative biocatalytic way is more sustainable but remains unexploited. The challenge lies in the redox potential mismatch between the …Are you looking to become a certified professional coder (CPC)? If so, you’ll need to pass the CPC practice exam. Taking the practice exam is a great way to prepare for the real th...Production of formate or CO from electrochemical CO2 reduction reactions (eCO2RRs) represents a promising way to utilize CO2 with future low-carbon electricity to produce value-added chemicals and fuels. Herein, a series of Cu–Sn composite catalysts were designed for eCO2RRs. The reduction products could be tuned selectively from …Electrochemical reduction of CO2 to produce fuels and chemicals is one of the most valuable approaches to achieve a carbon-neutral cycle. Recently, a diversity of catalysts have been developed to improve their intrinsic activity and efficiency. However, the dynamic evolution process and the in situ construction behavior of electrocatalysts under …For Librarians & Account Managers. ACS & Open Access. Matthew J. McKay. [email protected] Having access to mild and operationally simple techniques for attaining carbohydrate targets will be necessary to facilitate advancement in biological, medicinal, and pharmacological research. Even with the abundance of elegant reports for generating ...Apr 6, 2022 · Artificial enzymes, usually created by incorporating one or two abiological catalytic species into protein hosts, are becoming promising tools for biocatalysis. However, they are still far behind natural enzymes due to their limited active sites with low activity and selectivity. Here, we proposed a polymeric approach to generate artificial enzymes by combining proteins with organocatalytic ... Oct 19, 2020 · The electrocatalytic reduction of carbon dioxide (CO2) by means of renewable energies is widely recognized as a promising approach to establish a sustainable closed carbon cycle economy. However, widespread application is hampered by the inherent difficulty in suppressing the hydrogen evolution reaction and controlling the overall process selectivity. Further critical parameters are the ... Nature takes advantage of the pervasive presence of water to control many enzymatic reactions by utilizing the unique properties of water, which in turn help regulating reaction rates, selectivity, and rates of mass transfer. Some of the natural phenomena in which water plays the role of solvent, reactant, or byproduct find parallels in industrially relevant …Are you preparing for the RSCIT exam? Want to boost your chances of success on the online test? Look no further. In this article, we will provide you with some valuable tips and tr...Are you preparing for the RSCIT exam? Want to boost your chances of success on the online test? Look no further. In this article, we will provide you with some valuable tips and tr...ACS Catalysis 2022, 12, 18, 11002-11014 (Research Article) ACS Editors' Choice® is a collection designed to feature scientific articles of broad public interest. Read the latest articlesACS Catalysis is dedicated to publishing original research on heterogeneous catalysis, homogeneous catalysis, and bio-catalysis. Application coverage includes life sciences, drug discovery ...21 Sept 2021 ... ACS Science Talks features a series of lectures by many researchers in different diverse fields of chemistry from around the world.For those looking to become a bus driver, passing the class exams is an important part of the process. Bus driver class exams cover a variety of topics, from driving laws and regul...Oxidation of unactivated alkanes, which requires substantial energy for conversion to valuable organic chemicals, is a major challenge in both industry and academia. Herein, we describe how solvents affect and improve the catalytic oxidation ability of a mononuclear copper(II)–alkylperoxo complex, [CuII(iPr3-tren)(OOC(CH3)2Ph)]+ (1, …Cu single-atom catalysts (SACs) supported on CeO2–TiO2 were prepared by a sol–gel method and tested for CO oxidation between 120 and 350 °C. Operando and in situ spectroscopic methods including diffuse reflectance infrared Fourier transform (DRIFT), electron paramagnetic resonance (EPR), and near ambient pressure X-ray photoelectron spectroscopy (NAP-XPS) combined with other basic ... However, their utilization in synthetic photocatalysis, especially in the direct functionalization of C (sp 3 )–H bonds, remains underexplored. Herein, we report mesoporous graphitic carbon nitride (mpg-CN) as a heterogeneous organic semiconductor photocatalyst for direct arylation of C (sp 3 )–H bonds in combination with nickel catalysis.The enantioselective reduction of enamides is an efficient and atom-economical way to construct chiral amine motifs. In contrast to transition-metal complex based asymmetric hydrogenation, an alternative biocatalytic way is more sustainable but remains unexploited. The challenge lies in the redox potential mismatch between the …May 2, 2022 · ACS Catalysis (2021), 11 (14), 8929-8941 CODEN: ACCACS; ISSN: 2155-5435. ( American Chemical Society ) Developing a cost-effective and highly efficient electrocatalyst with superior catalytic activity is crucial for clean and green water splitting, including the hydrogen evolution reaction (HER), the oxygen evolution reaction (OER), and the ... 30 Jul 2020 ... ACS Catalysis cover image - April 2020. PNNL research, featured on the cover of ACS Catalysis, showed that certain crystal surfaces yield ...Ketones are among the most useful functional groups in organic synthesis. Here, we report a carbonylative cross-electrophile coupling reaction that utilizes carbon monoxide gas as both carbonyl source and reductant. The use of Pd/Rh cooperative catalysis enables the carbonylative coupling of easily accessible aryl triflates and aryl …Abstract. Transition metals can assemble to form multinuclear complexes by engaging in direct metal-to-metal interactions. Metal–metal covalent bonds provide a large perturbation in electronic structure, relative to mononuclear metal ions, and the unique properties of these dinuclear fragments can be harnessed in a broad range of …ACS Catalysis (2020), 10 (10), 5734-5749 CODEN: ACCACS; ISSN: 2155-5435. (American Chemical Society) A review. There is a considerable interest in the development of photocatalytic CO2 conversion by sunlight, since this process has similarities with natural photosynthesis on which life on Earth is based.The metal oxide-zeolite (OX-ZEO) bifunctional catalyst concept has aroused wide interest recently for direct syngas conversion. However, the mechanism of product selectivity control is far from being understood. Herein, we studied the role of acidity on the product selectivity by taking SAPO-18 as an example and physically mixing it with …This protocol provides a straightforward, efficient approach to synthetically important indole-containing cyclic ketones with an α-chiral center and features ...The AC Hotel Alicante, just outside the city center, checks all the boxes for modern decor, comfort, and service at an affordable price. We may be compensated when you click on pro...Apr 26, 2023 · Single-atom catalysts (SACs), consisting of individual metal atoms dispersed on a support, attract attention due to their unique reactivity, efficient use of precious metals, and precise chemical tunability. Characterization of the metal species is crucial to substantiate structure–function relationships. Authors often use─and referees often require─X-ray absorption spectroscopy (XAS ... Published by American Chemical Society. Enzymatic degradation of polyethylene terephthlate (PET) by polyester hydrolases is currently subject to intensive research, as it is considered as a potential eco-friendly recycling method for plastic waste. However, the substrate-binding mode and the molecular mechanism of enzymatic PET hydrolysis are ...3′-Phosphoadenosine-5′-phosphosulfate (PAPS) is a universal sulfate group donor for all biological sulfation reactions in living organisms. Ambitions to biomanufacture sulfate-containing compounds such as heparin and chondroitin sulfate also promote the study on PAPS in vitro synthesis. However, the established enzymatic synthesis of …Mar 1, 2022 · Dual-metal-site catalysts (DMSCs) have emerged as a frontier in heterogeneous catalysis, while the underlying relationships connecting their dual-site synergistic effects on catalytic performance remain unclear. Here we present a comprehensive first-principles study of O2 activation and CO oxidation on a series of N-coordinated DMSCs. We discovered that the N3-coordinated-adjacent dual-metal ... Achieving high activity and selectivity of multicarbon products in the CO2 reduction reaction (CO2RR) on Cu-based electrocatalysts remains challenging due to the limited concentration of local OH–, sluggish CO2 diffusion, and competitive hydrogen evolution reaction. Herein, we report aerophilic nanocomposites of hydrophobic SiO2 …
Understanding how multicopper oxidases (MCOs) reduce oxygen in the trinuclear copper cluster (TNC) is of great importance for development of catalysts for the oxygen reduction reaction (ORR). Herein, we report a mechanistic investigation into the ORR activity of the dinuclear copper complex [Cu2L(μ-OH)]3+ (L = 2,7-bis[bis(2-pyridylmethyl)aminomethyl] …. American girl doll gymnastics
Photocatalytic CO2 reduction is an ideal strategy to reduce greenhouse effects and realize carbon neutralization. Constructing active sites with specific designs is highly desired and challenging to achieve with high activity and selectivity of photoreduction. Herein, our studies find that a series of Bi-based materials with different compositions, …Launched in 2010, we've hosted programming at hundreds of institutions around the world, bringing the world’s leaders in chemistry, publishing, research, science communication …Constructing highly active photocatalysts with rich reactive sites for photofixation of CO2 with organic compounds implements an environmentally friendly route for CO2 valorization and carbon neutralization. Herein, we report the isolated cobalt (Co) single-atom (SA)-decorated two-dimensional (2D) single-layer ZnIn2S4 (ZIS) nanosheet …Dec 3, 2021 · Progress and Opportunities in Photochemical Enzymology of Oxidoreductases. Brandon L. Greene *. ACS Catalysis 2021, 11, 23, 14635-14650 (Perspective) Publication Date (Web): November 19, 2021. Abstract. Understanding the molecular basis for controlled H2O2 activation is of fundamental importance for peroxide-driven catalysis by metalloenzymes. In addition to O2 activation in the presence of stoichiometric reductants, an increasing number of metalloenzymes are found to activate the H2O2 cosubstrate for oxidative transformations …The most promising approach to mitigating the greenhouse effect and tackling the energy crisis is to convert carbon dioxide into valuable liquid fuels through artificial photosynthesis. Nevertheless, most photocatalysts have poor product selectivity, low catalytic performance, and poor cycling stability. Herein, we synthesized novel UiO …This protocol provides a straightforward, efficient approach to synthetically important indole-containing cyclic ketones with an α-chiral center and features ...Most people use the term AC condenser to refer to the part of the air conditioning system that sits outside the home, even though this part of the system has more components that j...Rhenium-Catalyzed Dehydration and Deoxydehydration of Alcohols and Polyols: Opportunities for the Formation of Olefins from Biomass. Suresh Raju. , Marc-Etienne …The transformation of CO2 into a single product is a critical scientific challenge because of the difficulty associated with targeted activation and conversion of CO2 by heterogeneous catalysts. Herein, we present an atomic-scale dispersed Co–N species anchored Co@C hybrid structure (entitled as Co@CoN&C) that regulates …1,3,4-Oxadiazolines can be activated by triplet energy transfer catalysis under visible-light irradiation. The generated carbenes react with electron-poor olefins, giving valuable spirocyclopropanes. Mechanistic investigations, both theoretical and experimental, uncover plausible pathways and highlight the importance of the triplet energy transfer steps. View …May 2, 2023 · Plasmonic catalysis is an ever-growing field in which chemical reactions are enabled by visible light excitation. The plasmonic effects provide a unique reaction environment, which can greatly affect chemical reaction processes. On the basis of extensive research on plasmon-induced chemical reactions, we focus on the fundamentals of plasmon-mediated catalytic selectivity and summarize recent ... .
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