Results 11 to 20 of about 980,418 (266)

Recent Advances in C–H Functionalization of Pyrenes

open access: yesChemistry, 2023
In recent years, transition metal-catalyzed C–H activation and site-selective functionalization have been considered to be valuable synthetic tactics to functionalize organic compounds containing multiple C–H bonds.
Srinivasarao Arulananda Babu   +2 more
doaj   +1 more source

Synthesis of group I–III–VI semiconductor quantum dots and its application in food safety testing

open access: yesReviews in Analytical Chemistry, 2022
As a good fluorescent material, most I–III–VI ternary semiconductor quantum dots (QDs) do not contain heavy metal elements such as Cd and Pb and thus have low toxicity. In addition, they also have excellent data performance such as narrow band gap, large
Zhou Hualan   +8 more
doaj   +1 more source

High‐entropy alloys and compounds for electrocatalytic energy conversion applications

open access: yesSusMat, 2021
High‐entropy materials, composed of five or more elements in near‐equiatomic percentage, have been attracting tremendous interests due to their advantageous properties in a variety of applications. Recently, electrocatalysis on high‐entropy alloys (HEAs)
Hang Liu   +6 more
doaj   +1 more source

Diamond Nanowires: A Novel Platform for Electrochemistry and Matrix-Free Mass Spectrometry

open access: yesSensors, 2015
Over the last decades, carbon-based nanostructures have generated a huge interest from both fundamental and technological viewpoints owing to their physicochemical characteristics, markedly different from their corresponding bulk states.
Sabine Szunerits   +2 more
doaj   +1 more source

Recent Synthetic Applications of the Hypervalent Iodine(III) Reagents in Visible-Light-Induced Photoredox Catalysis

open access: yesFrontiers in Chemistry, 2020
The synergistic combination of visible-light-induced photoredox catalysis with hypervalent iodine(III) reagents (HIRs) represents a particularly important achievement in the field of hypervalent iodine chemistry, and numerous notable organic ...
Chaoyue Chen   +3 more
doaj   +1 more source

Sequentially Palladium-Catalyzed Processes in One-Pot Syntheses of Heterocycles

open access: yesApplied Sciences, 2015
Sequentially Pd-catalyzed processes are excellent entries to heterocycle synthesis. The broad mechanistic variety combined with often very mild reaction conditions allow the concatenation of elementary organic and organometallic steps to novel sequences ...
Timo Lessing, Thomas J. J. Müller
doaj   +1 more source

Synthesis of the 1,5‐Benzothiazepane Scaffold – Established Methods and New Developments

open access: yesChemistryOpen, 2023
The 1,5‐benzothiazepane structure is an important heterocyclic moiety present in a variety of commercial drugs and pharmaceuticals. This privileged scaffold exhibits a diversity of biological activities, including antimicrobial, antibacterial, anti ...
Ulrike Ronse   +3 more
doaj   +1 more source

Recent Advances in the Synthesis of Cyclic Sulfoximines via C–H Bond Activation

open access: yesMolecules, 2023
Sulfoximines, a ubiquitous class of structural motifs, are widely present in bioactive molecules and functional materials that have received considerable attention from modern organic chemistry, pharmaceutical industries, and materials science ...
Bingren Wang, Xiayu Liang, Qingle Zeng
doaj   +1 more source

Recent Advances in Asymmetric Synthesis of Pyrrolidine-Based Organocatalysts and Their Application: A 15-Year Update

open access: yesMolecules, 2023
In 1971, chemists from Hoffmann-La Roche and Schering AG independently discovered a new asymmetric intramolecular aldol reaction catalyzed by the natural amino acid proline, a transformation now known as the Hajos–Parrish–Eder–Sauer–Wiechert reaction ...
Arianna Quintavalla   +2 more
doaj   +1 more source

Prediction Intervals for Synthetic Control Methods [PDF]

open access: yesJournal of the American Statistical Association, 2021
Uncertainty quantification is a fundamental problem in the analysis and interpretation of synthetic control (SC) methods. We develop conditional prediction intervals in the SC framework, and provide conditions under which these intervals offer finite-sample probability guarantees. Our method allows for covariate adjustment and non-stationary data.
Cattaneo, Matias D.   +2 more
openaire   +3 more sources

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