Contaminated drinking water is the leading cause of diseases such as diarrhea, typhoid fever, hepatitis A and E, poliomyelitis, and cholera. The main objective of this project was the development of PVA-based hydrogels loaded with silver nanoparticles (Ag-NPs) synthesized through a green synthesis process, with biocidal activity for the treatment of contaminated water.
Hydrazones as organometallic equivalents have emerged as a general and sustainable strategy to utilize naturally abundant aldehydes and ketones as feedstocks while only releasing water and nitrogen gas as byproducts. Yet the addition of these carbanion equivalents to carbonyl compounds has been limited to the use of precious metals as catalysts and hazardous solvents under an inert atmosphere. Herein, we report the development of a manganese-based catalyst system for the addition of aldehydes to carbonyl compounds producing secondary and tertiary alcohols with yields of up to 91%.
Building on the 2023 Sustainable Chemistry landscape report which identified key strategic areas that could accelerate innovation and transition to sustainable chemistry, this new report defines a plan to advance four strategic goals: Discovering More Sustainable Chemistry for Future Solutions; Supporting, Building, and Bridging Sustainable Chemistry for Discovery to Commercialization; Promoting Adoption and Growth of Sustainable Chemistry in Business and Subnational Government and; Creating a 21st Century Federal Service for Sustainable Chemistry.
The synthesis and use of ionic liquids (ILs) has increased steadily since their inception, driven by their distinctive useful properties. In cases where they replace harmful volatile organic solvents they are often considered “green” and in cases where they are recyclable, they may be considered sustainable. However, many of the properties—such as low volatility and stability—that make them attractive for applications also make them potential persistent contaminants, should they be released into the environment.
Heterocyclic ring systems are essential in drug design, serving as core structures in many approved drugs. Nitrogen- and oxygen-containing heterocycles, in particular, have become increasingly significant in recent years. Despite the availability of efficient synthetic methods, there is an ongoing need for new approaches that offer higher molecular complexity, better functional group compatibility, and atom economy, using readily available starting materials under mild conditions.
In this work, a response surface methodology (RSM) was used to attain optimal conditions for polyphenols extraction from Yerba Mate (YM, South-America infusion) using water as solvent under ultrasound. The following parameters were varied: mass of YM/volume of water (YM/W), pH, temperature, and time. This study helps to developing an eco-friendly and cost-effective experimental design, reducing the production of wastes, and using a very fast water-based method for the extraction.
Among the most active areas of chemistry research today is that of carbon dioxide utilization: an area of research that was viewed as futile and commercially impractical not so long ago due to the energetic stability of the CO2 molecule. The breakthroughs that largely began in earnest in the 1990s have accelerated and now make up a diverse and plentiful portfolio of technological and scientific advances and commercialized technologies.
