Highly functionalized xanthenes possess an impressive range of bioactivities and daunting synthetic challenge due to their unique ring systems and stereocenters. Here, we report an unprecedented ketyl radicals-induced skeletal rearrangement reaction of spirodihydrobenzofurans, enabled by zero-valent iron as reducing agents via photoredox catalysis, facilitating the facile preparation of various highly functionalized xanthenes. The features of this protocol include high chemo- and regioselectivity, exceptionally mild conditions, a broad substrate scope, scalability to gram-scale quantities, and consistent delivery of good to excellent yields.
View Article and Find Full Text PDFCyclic compounds are appealing owing to their intrinsic porous structures and facile accessibility as building blocks (BBs) for fabricating high-order assemblies. Nevertheless, the modular synthesis of such molecular entities and their subsequent controlled assembly are still very challenging. Herein, we report the synthesis of a gigantic molybdenum blue (MB) wheel {Mo} (), featuring a skirt-shaped structure dimerized from {Mo}.
View Article and Find Full Text PDFTwo types of neuron models are constructed in this paper, namely the single discrete memristive synaptic neuron model and the dual discrete memristive synaptic neuron model. Firstly, it is proved that both models have only one unstable equilibrium point. Then, the influence of the coupling strength parameters and neural membrane amplification coefficient of the corresponding system of the two models on the rich dynamical behavior of the systems is analyzed.
View Article and Find Full Text PDFAlzheimer's disease (AD) presents a significant challenge in healthcare, highlighting the necessity for early and precise diagnostic tools. Our model, DAMNet, processes multi-dimensional AD data effectively, utilizing only 7.4 million parameters to achieve diagnostic accuracies of 98.
View Article and Find Full Text PDFMicroplastic pollution has become a significant environmental issue. One of the most important sources and components of microplastics is polyester fabric - polyethylene terephthalate (PET). Because the catalytic depolymerization of PET typically requires specific conditions such as alkaline environments, specific solvents, or high temperatures, there is an urgent need for a simpler, eco-friendly solution with high degradation efficiency for managing the vast amounts of PET textile waste.
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