Megastigmane glycoside and phenol glycosides from the bark of Croizat.

A new megastigmane glycoside, conspurcoside A (), two new phenol glycosides, conspurcosides B () and C (), along with twelve known compounds (-) were isolated from the bark of Croizat. The structures of these compounds were identified through analysis of spectroscopic data, including 1D and 2D NMR, HRESIMS, and ECD methods. Compounds (-, -) were tested for inhibition of NO production in lipopolysaccharide (LPS)-induced RAW 264.

Dual-linker Ir-Zr-MOF shows improved porosity to enhance aqueous sulfide photooxidation.

The hetero photooxidation of sulfide under aqueous conditions is of great importance in the green synthesis of sulfoxide. This process requires a type of solid photocatalyst with the properties of high porosity and water stability, as well as photosensitivity. Herein, a stable Ir-Zr-MOF material (compound 1) with high porosity is assembled from two linear linkers of a 2-phenylquinoline-4-carboxylic acid-Ir(III) complex (Irphen) and 4,4'-stilbenedicarboxylic acid (HSDC), and a Zr cluster.

Photocatalytic Degradation of Malachite Green by Titanium Dioxide/Covalent Organic Framework Composite: Characterization, Performance and Mechanism.

In this paper, a titanium dioxide/covalent organic framework (TiO/COF) composite was prepared and its photocatalytic removal of dye was investigated. Using tetrabutyl titanate as a titanium source, TiO nanomaterial was prepared by sol-gel method. In the presence of TiO, TiO/COF core-shell composite was prepared by solvothermal synthesis using melamine and 1,4-phthalaldehyde as ligands.

Determination of Pb by Colorimetric Method Based on Catalytic Amplification of Ag Nanoparticles Supported by Covalent Organic Frameworks.

In this paper, covalent organic frameworks (COFs) are prepared by solvothermal synthesis using 1,3,5-benzenetricarboxaldehyde and benzidine as ligands. Then, using COFs as a template, AgCOFs with high catalytic activity is prepared by in situ loading silver nanoparticles (AgNC) on the surface of COFs by sodium borohydride reduction method. AgCOFs are characterized by TEM, SEM, FTIR and XRD.

Ionic-liquid-modified magnetic nanoparticles as a solid-phase extraction adsorbent coupled with high-performance liquid chromatography for the determination of linear alkylbenzene sulfonates in water samples.

Novel ionic-liquid-functionalized Fe O magnetic nanoparticles were synthesized by the thiol-ene click reaction. The prepared functionalized Fe O nanoparticles possessed multiple interactions, such as electrostatic, hydrophobic, and π-π interactions. The functionalized Fe O nanoparticles were characterized by using Fourier transform infrared spectroscopy, X-ray diffraction, vibrating sample magnetometry, and transmission electron microscopy.

[Study on microwave extracting process of polysaccharide from Euonymus fortunei].

Objective: To study the best extraction process of the polysaccharides from Euonymus fortuei with microwave.

Methods: The orthogonal experiment was used to investigate 4 influential factors: the ratio of solid to liquid (A), microwave power (B), extraction time (C), the times of extraction (D).

Results: The optimal conditions were A1B1C3D3 as the microwave power was 30W, the ratio of solid to liquid was 1:50, the time of extraction was 14 min, and extracting for 4 times.