Results 51 to 60 of about 237,640 (302)

Development of microwave chemistry through a co-operation between a university and an equipment manufacturer

open access: yesGreen Processing and Synthesis, 2012
This mini-overview focuses on selected important details of reaction engineering in microwave chemistry and discusses the co-operation between the university working group “Alternative Energies” in Jena and the microwave plant MLS GmbH (Leutkirch/Germany)
Ondruschka Bernd, Lautenschläger Werner
doaj   +1 more source

Recent Developments in Transition-Metal Catalyzed Direct C–H Alkenylation, Alkylation, and Alkynylation of Azoles

open access: yesMolecules, 2020
The transition metal-catalyzed C–H bond functionalization of azoles has emerged as one of the most important strategies to decorate these biologically important scaffolds. Despite significant progress in the C–H functionalization of various heteroarenes,
Su Chen   +4 more
doaj   +1 more source

Effective microwave-assisted approach to 1,2,3-triazolobenzodiazepinones via tandem Ugi reaction/catalyst-free intramolecular azide–alkyne cycloaddition

open access: yesBeilstein Journal of Organic Chemistry, 2021
A novel catalyst-free synthetic approach to 1,2,3-triazolobenzodiazepinones has been developed and optimized. The Ugi reaction of 2-azidobenzaldehyde, various amines, isocyanides, and acids followed by microwave-assisted intramolecular azide–alkyne ...
Maryna O. Mazur   +8 more
doaj   +1 more source

Chitosan-g-oligo(epsilon-caprolactone) polymeric micelles: microwave-assisted synthesis and physicochemical and cytocompatibility characterization [PDF]

open access: yes, 2015
With the aim to produce mucoadhesive polymeric micelles for drug administration by mucosal routes, chitosan-g-oligo(epsilon-caprolactone) copolymers were synthesized by the microwave-assisted ring-opening polymerization of epsilon-caprolactone using ...
Calderon, Marcelo   +5 more
core   +1 more source

Synchrotron Radiation for Quantum Technology

open access: yesAdvanced Functional Materials, EarlyView.
Materials and interfaces underpin quantum technologies, with synchrotron and FEL methods key to understanding and optimizing them. Advances span superconducting and semiconducting qubits, 2D materials, and topological systems, where strain, defects, and interfaces govern performance.
Oliver Rader   +10 more
wiley   +1 more source

O uso de aparelhos de micro-ondas domésticos em aulas experimentais de química orgânica: nitração de salicilaldeído The use of domestic microwave oven in experimental classes of organic chemistry: salicylaldehyde nitration

open access: yesQuímica Nova, 2010
The use of microwave in chemistry has known benefits over conventional heating methods, e.g. reduced reaction times, chemical yield improvement and the possibility if reducing or eliminating the use of organic solvents. We describe herein a procedure for
Eurídes Francisco Teixeira   +5 more
doaj   +1 more source

A microwave approach to the synthesis of certain 4-substituted phenyl-6-phenyl-3-cyano-2-pyridones [PDF]

open access: yesJournal of the Serbian Chemical Society, 2014
A study of the synthesis of 4-substituted phenyl-6-phenyl-3-cyano-2-pyridones from 2-cyano-3-phenylsubstituted acrylates and acetophenone is presented. 2-Pyridones were obtained using conventional as well as microwave synthesis using solvent and
Marinković Aleksandar   +4 more
doaj   +1 more source

Photoactivation of NV Centers in Diamond via Continuous Wave Laser Illumination of Shallow As‐Implanted Nitrogen

open access: yesAdvanced Functional Materials, EarlyView.
This study demonstrates an alternative method of creating charge‐stable negatively charged nitrogen vacancy (NV−) centers close to the diamond surface without high‐temperature annealing. By illuminating nitrogen‐implanted regions with a continuous‐wave 405 nm laser, NV− centers are induced, exhibiting electron spin coherence properties suitable for ...
Jens Fuhrmann   +4 more
wiley   +1 more source

Dynamic Bayesian Nonlinear Calibration [PDF]

open access: yes, 2014
Statistical calibration where the curve is nonlinear is important in many areas, such as analytical chemistry and radiometry. Especially in radiometry, instrument characteristics change over time, thus calibration is a process that must be conducted as ...
Boone, Edward L., Rivers, Derick L.
core  

Cu‐Based MOF/TiO2 Composite Nanomaterials for Photocatalytic Hydrogen Generation and the Role of Copper

open access: yesAdvanced Functional Materials, EarlyView.
HKUST‐1/TiO2 composite materials show a very high photocatalytic hydrogen evolution rate which increases as a function of the irradiation time until reaching a plateau and even surpasses the performance of the 1%Pt/TiO2 material after three photocatalytic cycles.
Alisha Khan   +9 more
wiley   +1 more source

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