Synthesis of α-alkylidene cyclic carbonates via CO2 fixation under ambient conditions promoted by an easily available silver carbamate

A series of α-alkylidene cyclic carbonates has been synthesized under mild conditions using silver carbamate Ag(O2CNEt2) in combination with PPh3.

Carboxylation of terminal alkynes promoted by silver carbamate at ambient pressure

Simple and easily available silver and copper carbamates were investigated as catalysts for the carboxylation of terminal alkynes. Ag(O2CNMe2), combined with Cs2CO3, afforded propiolic acids at ambient CO2 pressure in satisfying yields.

Investigation of the antimicrobial and wound healing properties of silver nanoparticle-loaded cotton prepared using silver carbamate

In this paper, silver nanoparticle (AgNP)-coated cotton wool with sustained antibacterial properties was produced using a convenient solution-dipping method that involves soaking the cotton in a silver 2-ethylhexylcarbamate solution, followed by thermal reduction at 120℃. The silver-coated cotton was characterized by scanning electron microscopy, energy dispersive X-ray spectroscopy, and X-ray diffraction patterns. AgNPs with a uniform and high deposition density formed on the surface of the cotton and ranged in size from 20 to 80 nm. The antibacterial activity, blood clotting, and other physical properties, such as saline absorption and ultraviolet (UV)-blocking of Ag/cotton wool with different silver content were examined. All Ag/cotton fabrics exhibited excellent antibacterial activity against Staphylococcus aureus and Escherichia coli. AgNP-loaded cotton demonstrated faster blood clotting rates and better absorption of 0.9% (w/v) saline solution than unmodified cotton. In addition, AgNP-loaded cotton showed excellent UV protection properties.

Facile preparation of antibacterial, highly elastic silvered polyurethane nanofiber fabrics using silver carbamate and their dermal wound healing properties

In this study, polycarbonate diol/isosorbide-based antibacterial polyurethane nanofiber fabrics containing Ag nanoparticles were prepared by electrospinning process. Bio-based highly elastic polyurethane was prepared from hexamethylene diisocyanate and isosorbide/polycarbonate diol (8/2) by a simple one-shot bulk polymerization. Ag nanoparticles were formed using simple thermal reduction of silver 2-ethylhexylcarbamate at 120℃. The structural and morphological properties of polyurethane/Ag nanofibers were characterized by X-ray diffraction and scanning electron microscopy. The polyurethane nanofiber fabrics were flexible, with breaking strains from 355% to 950% under 7.28 to 23.1 MPa tensile stress. The antibacterial effects of the treated polyurethane/Ag fabrics against Staphylococcus aureus and methicillin resistant Staphylococcus aureus were examined and found to be excellent. Cell proliferation using the immortalized human keratinocyte HaCaT cell line was performed in order to determine cell viability in the presence of polyurethane and polyurethane/Ag fabrics, showing cytocompatiblility and a lack of toxicity.