Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1609759 | PMC |
| http://dx.doi.org/10.1097/00000658-195409000-00008 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Scale-Up of Continuous Metallaphotoredox Catalyzed C-O Coupling to a 10 kg-Scale Using Small Footprint Photochemical Taylor Vortex Flow Reactors.
Org Process Res Dev
January 2025
School of Chemistry, The University of Nottingham, University Park, Nottingham NG7 2RD, U.K.
We report the development and optimization of a scalable flow process for metallaphotoredox (Ir/Ni) C-O coupling, a mild and efficient approach for forming alkyl-aryl ethers, a common motif in medicinal and process chemistry settings. Time-resolved infrared spectroscopy (TRIR) highlighted the amine as the major quencher of the photocatalyst triplet excited state, along with the formation of an Ir(II) species that, in the presence of the Ni cocatalyst, has its lifetime shortened, suggesting reductive quenching of Ir(III)*, followed by reoxidation facilitated by the Ni cocatalyst. TRIR and batch reaction screening was used to develop conditions transferrable to flow, and many processing benefits of performing the reaction in flow were then demonstrated using a simple to construct/operate, small-footprint FEP coil flow reactor, including short (<10 min) space times and reduced catalyst loadings (down to 0.
View Article and Find Full Text PDFExperimental and analytical study on axial behaviour of square corrugated concrete filled single and double skin tube stub columns.
Sci Rep
January 2025
Department of Structural Engineering, Faculty of Engineering, Mansoura University, Mansoura, Egypt.
Concrete-filled double-skin steel tubular (CFDST) columns have become widely utilized in building construction and bridges, thanks to their exceptional structural capabilities. Therefore, this study investigates the axial compressive behavior of square CFDST columns. The study aims to explore the influence of external and internal plate shapes (flat or corrugated plates) and different widths of internal steel tubes on the axial compressive behavior.
View Article and Find Full Text PDFOil recovery and heat transfer performance of polyurethane sponges coated with 3D carbon nano networks.
J Hazard Mater
December 2024
Center for Membrane Separation and Water Science & Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China.
Heatable super hydrophobic polyurethane (PU) sponges (S-GNS/CNT/PVA@PU) containing three-dimensional (3D) carbon nano-networks (CNNs) coatings made from two-dimensional (2D) expanded graphite nano-sheets (GNS) bridged by one-dimensional (1D) carbon nano-tubes (CNT) were constructed using polyvinyl alcohol (PVA) as binder, in which light and/or electric energy could be rapidly converted into heat to reduce the viscosity of spilled heavy oils, resulting in greatly increased oil. Their heavy oil recovery rate could reach 792 kg/(m·h) under combined light and Joule heating of 1 sun and 5 V. Surface heat dissipating coefficient Ks, heat dissipating index n, and surface heat absorption capacity Cs were studied relating to sizes and shapes of surface heating fields under varied heating modes.
View Article and Find Full Text PDFConstruction of Double-layered DNA Tiles and Arrays from Double Crossover Motifs.
Chembiochem
January 2025
State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, 163 Xianlin Avenue, Nanjing, 210023, P. R. China E-amil.
DNA double crossover (DX) motifs including DAE (double crossover, antiparallel, even spacing) and DAO (double crossover, antiparallel, odd spacing) are well-known monolayered DNA building blocks for construction of 2D DNA arrays and tubes in nanoscale and microscale. Compared to the 3D architectures of DNA origami and single-stranded DNA bricks to build nanoscale 3D bundles, tessellations, gears, castles, etc., designs of double- and multi-layers of DX motifs for 3D architectures are still limited.
View Article and Find Full Text PDFA Rapidly Tunable Laser System for Measurements of NH at 597 nm Behind Reflected Shock Waves.
Sensors (Basel)
December 2024
Department of Mechanical Engineering, Stanford University, Stanford, CA 93405, USA.
Distributed feedback lasers, which feature rapid wavelength tunability, are not presently available in the yellow and orange spectral regions, impeding spectroscopic studies of short-lived species that absorb light in this range. To meet this need, a rapidly tunable laser system was constructed, characterized, and demonstrated for measurements of the NH radical at 597.4 nm.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!