Engineering of carbon based nanomaterials by ring-opening reactions of a reactive azlactone graphene platform

Abstract

A reactive azlactone-based graphene nanoplatform was successfully synthesized by the ligation of azido-azlactone with alkyne-terminated graphene via Cu(I)-catalyzed cycloaddition. The reactive azlactone rings, grafted on graphene sheets, were subjected to highly efficient ring-opening reactions with functionalized primary amine derivatives incorporating an aminosilane coupling agent or a biological fragment.

Polymer-Based Graphene Derivatives and Microwave-Assisted Silver Nanoparticles Decoration as a Potential Antibacterial Agent

“…Taking into account that the starting GO is produced as folded and large sheets, the effects of the concurrent microwave irradiation and deposition of AgNPs have promoted the unfolding and formation of well-exfoliated graphene sheets having different levels of transparency. As a result, PVA@rGO-Ag1 shows the typical morphology of functionalized reduced graphene ( Figure 5B), as observed in our previous papers [34,35], evidencing planar backbone conformation and transparency. The AgNPs were detected as dark spots homogeneously dispersed over the PVA@rGO background material ( Figure 5C,D), confirming a random formation of nucleation site within the polymer-based nanosystem.…”

“…Graphene oxide (GO) was prepared by oxidizing graphite powders (diameter 5-10 µm, thickness 4-20 nm, layers < 30) according to our previously reported procedure [34] using the Hummers method [47]. Briefly, graphite (2 g) and concentrated sulfuric acid (350 mL) mixture was cooled at 0 • C under stirring.…”

“Click” on PLGA‐PEG and hyaluronic acid: Gaining access to anti‐leishmanial pentamidine bioconjugates

“…The solution (pH = 7) was then cooled to 4°C, and 18 mg (0.1 mmol) of CDMT was added and stirred for 2 h at rt. The solution was mixed with 37 mg (0.25 mmol) of 4–(2‐propynyloxy)‐benzamine and stirred for 24 h at 40°C. The acetonitrile was removed under reduced pressure.…”

Three‐Dimensional Flower‐Like MoS2@Carbon Nanotube Composites with Interconnected Porous Networks and High Catalytic Activity as Cathode for Lithium‐Oxygen Batteries

“…For S 2 p spectra, two peaks at approximately 163.2 and 162.3 eV were generated from S 2 p 1/2 and S 2 p 3/2 , respectively (Figures e and S7b†). In the case of the C 1s spectrum for f‐MoS 2 @CNTs (Figure f), the strong peaks at 285.8, 284.8, and 284.2 eV are ascribed to C−O, C−C/C−H, and C=C, respectively.…”