The pharmaceutical clay montmorillonite (MMT) is, for the first time, explored as a carbon monoxide-releasing material (CORMat). MMT consists of silicate double layered structure; its exfoliation feature intercalate the CORM-2 [RuCl(μ-Cl)(CO)3]2 inside the layers to suppress the toxicity of organometallic segment. The infrared spectroscopy (IR) confirmed the existence of ruthenium coordinated carbonyl ligand in MMT layers. The energy-dispersive X-ray spectroscopy (EDX) analysis showed that ruthenium element in this material was about 5%. The scanning electron microscopy (SEM) and transmission electron microscope (TEM) images showed that the layer-structure of MMT has been maintained after loading the ruthenium carbonyl segment. Moreover, the layers have been stretched out, which was confirmed by X-ray diffraction (XRD) analysis. Thermogravimetric (TG) curves with huge weight loss around 100–200 °C were attributed to the CO hot-release of ruthenium carbonyl as well as the loss of the adsorbed solvent molecules and the water molecules between the layers. The CO-liberating properties have been assessed through myoglobin assay. The horse myoglobin test showed that the material could be hydrolyzed to slowly release carbon monoxide in physiological environments. The half-life of CO release was much longer than that of CORM-3, and it has an excellent environmental tolerance and slow release effect.

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The latent fault diagnosis of GIS equipment relies on the electrothermal corrosion information of the decomposition products of SF6. The thermal decomposition of epoxy resin under atmosphere (SF6-Epoxy) is essential to reveal the relationship between carbon-based characteristic decomposition components and the degradation of insulating materials. The thermal decomposition process of SF6-Epoxy was measured using synchronous thermogravimetry(TG)/differential scanning calorimetry(DSC), which unveiled the three pyrolysis stages of temperature range and heat release. The online gas chromatography identified nine decomposition components containing carbon, sulfur and oxygen elements. According to the panoramic pyrolysis reaction mechanism of the SF6-epoxy system, CO2, CH4, SOF2, H2S and H2 were proposed as the characteristic decomposition components for the thermal deterioration of SF6-Epoxy insulating system.

Palladium-catalysed Suzuki-Miyaura Couplings of α, β-unsaturated acid derivatives are challenging due to the susceptibility of their C=C bonds adjacent to carbonyl groups. In this work, we describe a highly selective...

The palladium-catalyzed Sonogashira coupling of α, β-unsaturated acid derivatives offers a diversity-oriented synthetic strategy for cross-conjugated enynones. However, the susceptibility of the unsaturated C-C bonds adjacent to the carbonyl group toward Pd catalysts makes the direct conversion of α, β-unsaturated derivatives as acyl electrophiles to cross-conjugated ketones rare. This work presents a highly selective C-O activation approach to prepare cross-conjugated enynones using α, β-unsaturated triazine esters as acyl electrophiles. Under base and phosphine ligand-free conditions, NHC-Pd(II)-Allyl precatalyst alone catalyzed the cross-coupling of α, β-unsaturated triazine esters with terminal alkynes efficiently, yielding 31 cross-conjugated enynones with diverse functional groups. This method demonstrates the potential of triazine-mediated C-O activation for preparing highly functionalized ketones.