Ohne hochtoxische Verbindungen wie KCN und eine thermische Nachbehandlung wurden Au/MgF2‐Komplexe durch eine einfache simultane Nassimprägnierung mit Tetrachlorogoldsäure als Goldvorstufe zugänglich. Einer der so erhaltenen Komplexe weist einzigartige katalytische Eigenschaften auf und ermöglichte die heterogen katalysierte hoch diastereoselektive Eintopfreaktion von Citronellal zu (±)‐Menthol (siehe Bild).
Durch Kombination von Iridium, das eine hohe Affinität für Carbonylgruppen aufweist, mit einem sauren H‐β‐Zeolith als Träger‐ und Promotormaterial erhält man einen effektiven Katalysator für die chemoselektive Hydrierung von α,β‐ungesättigten Aldehyden und Ketonen zu den entsprechenden Allylalkoholen. Steroid‐Enone bieten sich als Substrate für diese Umwandlung an (siehe Schema; R=CH(Me)(CH2)3CH(Me)2).
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Considerable efforts have been made in recent years to identify an optimal treatment method for the removal of antibiotics from wastewaters. A series of supramolecular organic-inorganic magnetic composites containing Zn-modified MgAl LDHs and Cu-phthalocyanine as photosensitizer have been prepared with the scope to β-lactam antibiotics removal from aqueous solutions. The characterization of these materials confirmed the anchorage of Cu-phthalocyanine onto the edges of the LDH lamellae, with a negligible part inserted in the interlayer space. The removal of β-lactam antibiotics occurred via a concerted adsorption and photocatalytic degradation. The efficiency of the composites was depending on i) the LDH: magnetic nanoparticle (MP) ratio, that is strongly correlated to the textural properties of the catalysts, and ii) the phthalocyanine loading in the final composite. A maximum of the efficiency was achieved with a removal of ~93% of antibiotics after 2h of reaction.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.