Transition Metal Germanium Chalcogenide Materials: Solvothermal Syntheses, Flexible Crystal, Structures, and Photoelectric Response Property

The chalcogenides Cs2CdGeSe4 (1), Cs2Hg2GeSe5 (2), and Na3RbCu8Ge3S12 (3) were synthesized by solvothermal condition. Germanium chalcogenides containing transition metals have flexible crystal structures. Compound 1 has a one-dimensional (1-D) chain structure consisting of anionic chain ∞1{[GeCdSe4]2–} and Cs+ cations. Compound 2 is a zero-dimensional (0-D) cluster structure consisting of anionic clusters of [GeHgSe5]2– and Cs+ cations. Compound 3 is a three-dimensional (3-D) network structure consisting of a copper-rich [Cu8Ge3S12]4– anion and Na+ and Rb+ cations. Transition metal compounds with inorganic frameworks have abundant optical and electrical properties. We explored the photocurrent response of compounds 1–3. There are remarkable photocurrent densities for compounds 1–3, especially 1 with a density of 180 μA/cm2, which is superior to most germanium chalcogenides

Aminolysis of Aryl Ester Using Tertiary Amine as Amino Donor via C–O and C–N Bond Activations

An aminolysis reaction between various aryl esters and inert tertiary amines by C–O and C–N bond activations has been developed for the selective synthesis of a broad scope of tertiary amides under neutral and mild conditions. The mechanism may undergo the two key steps of oxidative addition of acyl C–O bond in parent ester and C–N bond cleavage of tertiary amine via an iminium-type intermediate

Energy-Efficient Green Catalysis: Supported Gold Nanoparticle-Catalyzed Aminolysis of Esters with Inert Tertiary Amines by C–O and C–N Bond Activations

Catalyzed by supported gold nanoparticles, an aminolysis reaction between various aryl esters and inert tertiary amines by C–O and C–N bond activations has been developed for the selective synthesis of tertiary amides. Comparison studies indicated that the gold nanoparticles could perform energy-efficient green catalysis at room temperature, whereas Pd­(OAc)₂ could not