Journal of Sulfur Chemistry最新文献

The incomplete reduction of graphene oxide (GO) yields reduced graphene oxide (rGO), characterized by a zero band gap and intrinsic layer stacking, thus constraining its practical utility across diverse domains. Fortunately, this challenge can be effectively addressed by employing a suitable substrate for the fabrication of MoS₂/rGO heterostructures. Nanocomposites of MoS₂/reduced graphene oxide (MoS₂/rGO-700W and MoS₂/rGO-560W) were synthesized using MoS₂ and GO solutions as starting materials through microwave-assisted synthesis with microwave power treatments of 700W and 560W, respectively. Structural characterization results reveal that the particle size of MoS₂ within the composites is notably smaller compared to that of pure MoS₂. The MoS₂/rGO-700W composite demonstrates a more homogeneous dispersion of MoS₂ and features a well-developed hierarchical porous structure with increased pore volume and specific surface area. The MoS₂/rGO-700W composite demonstrates elevated I_D/I_G ratio, C/O ratio and C = C peak area, suggesting that increased microwave power enhances the removal of oxygen-containing groups from rGO. This process significantly restores the extended conjugated structure of graphene, thereby offering enhanced conductivity at the MoS₂ interface. Furthermore, the proposed strategy holds considerable theoretical value and provides significant insights for the development process of novel MoS₂-based composite electrode materials.

A rapid practical new synthesis of multi-substituted pyrrole derivatives with high yields through a novel four-component reaction of sulfonyl azides, terminal alkynes, nitro compounds, and trichloroacetonitril is a remarkable achievement in organic chemistry. This strategy offers a direct and efficient route to access complex molecular structures from readily available starting materials. To expand the work, the reaction of the final product with sulfinate salt under simple conditions and room temperature, poly-substituted pyrroles with sulfone functional group are formed. The combination of available starting materials, catalytic systems, mild reaction conditions, and ease of purification procedures contributes to the attractiveness of this method for the synthesis of diverse multi-substituted pyrrole derivatives.

The novel immobilization of L-Valine on superparamagnetic Fe₃O₄ nanoparticles was prepared using a simple protocol for the first time. This compound acts as a highly efficient and recyclable heterogeneous nanocatalyst for the synthesis of thiazole derivatives via a one-pot and multi-component condensation reaction of arylglyoxals monohydrate, cyclic 1,3-dicarbonyls, and thiobenzamides in a water solvent. The structure of the nanocatalyst was characterized and confirmed using various techniques, such as Fourier transform infrared spectroscopy (FT-IR), Energy Dispersive X-ray (XRD), scanning electron microscopy (SEM), thermogravimetric analysis (TG/DTA), and vibrating sample magnetometry (VSM). This heterogeneous nanocatalyst can be easily recovered from the reaction mixture by an external magnetic field and reused for subsequent reactions at least five times without losing significant catalytic activity.

A novel and efficient method has been developed for synthesizing benzothioamide from benzonitrile in supercritical CO₂, which could be used to synthesize various benzothioamide derivatives efficiently with yields of up to 98% without the need for organic solvent. Notably, some H₂S-based salts were designed and prepared, and they were found to be effective catalysts in promoting the thiolysis of benzonitrile to produce benzothioamide in an excellent yield. Furthermore, the utilization of supercritical CO₂ as a solvent has demonstrated a remarkable increase in the yield of the desired product compared to conventional solvents for promoting benzonitrile thiolysis. Additionally, the investigation of the reaction mechanism has revealed that the acid–base properties of the reaction solution played a crucial role in the thiolysis of benzonitrile mediated by the H₂S-based salts.