Electronic Structure of Graphdiyne Probed by X-ray Absorption Spectroscopy and Scanning Transmission X-ray Microscopy

Abstract

The electronic structure of graphdiyne exposed to air is investigated utilizing X-ray absorption spectroscopy and scanning transmission X-ray microscopy. It is found that carbon−carbon triple bonds at defect sites in graphdiyne have been changed to double bonds after 3 months in air. The experimental results reveal the existence of oxygen and nitrogen functional groups and indicate that the oxidation takes place throughout the aged graphdiyne while the nitrogen contamination is mainly on its surface. Buckling of the aged graphdiyne is observed, resulting from bond length change due to the opening of triple bonds. It is also shown that annealing at a high temperature such as 800 °C may remove most of the functional groups in the aged graphdiyne.

Design and Synthesis of Fluorinated and/or Hydroxylated 2‐Arylidene‐1‐indanone Derivatives as an Inhibitor of LPS‐stimulated ROS Production in RAW 264.7 Macrophages with Structure–Activity Relationship Study

“…1‐Indanone and their derivatives have been extensively studied recently and have shown very good biological activity as anti‐inflammatory, anti‐cancer, antiviral, and antibacterial . Studies carried out on compounds possessing 1‐indanone moiety demonstrated a very potent anti‐inflammatory activity in RAW 264.7 macrophages and inhibiting NO production up to 61% . Thereafter, in the quest to discover valuable anti‐inflammatory compounds, our research groups have performed some synthetic modifications of chalcone to 2‐benzylidene‐1‐indanone (Figure (c)) and 3‐benzylidenechroman‐4‐ones derivatives that inhibited the production of ROS in LPS‐stimulated RAW 264.7 macrophages .…”

A biomolecule-assisted, cost-efficient route for growing tunable CuInS2 films for green energy application

“…[20][21][22] Previously reported L-cysteine-assisted synthesis strategies involving solvothermal processes include Bi 2 S 3 , In 2 S 3 , CuS, PbS, AgBiS 2 , TiO 2 , ZnIn 2 S 4 , Cu 2 CoSnS 4 and CuInS 2 nanocrystals. 17,[23][24][25][26][27][28][29][30][31] CuInS 2 nanocrystals have been synthesized by Liu et al via a L-cysteine-assisted solvothermal process. 17 They obtained a product containing agglomerations of irregular microspheres and nanocrystals.…”

Mechanistic Study and Multi‐Response Optimization of the Electrochemical Treatment of Petroleum Refinery Wastewater

“…Therefore, the removal of these toxic compounds is necessary before the wastewater is sent to the biological treatment unit. A number of treatment technologies have been suggested for PRW that include enhanced photo‐degradation, biodegradation, membrane bioreactor, flocculation and ceramic membrane filtration, advanced oxidation, adsorption, and electrochemical methods …”