In this contribution, Fe3O4 magnetic nanoparticles (MNPs) have been functionalized with a tetraphosphonate cavitand receptor (Tiiii), capable of complexing N-monomethylated species with high selectivity, and polyethylene glycol (PEG) via click-chemistry. The grafting process is based on MNP pre-functionalization with a bifunctional phosphonic linker, 10-undecynylphosphonic acid, anchored on an ...

State-of-the-art automotive fuel cells that operate at about 80 °C require large radiators and air intakes to avoid overheating. High-temperature above 100 under anhydrous conditions provide an ideal solution for heat rejection in heavy-duty vehicle applications. Here we report protonated phosphonic acid electrodes remarkably improve the performance of high-temperature polymer electrolyte membr...

Molybdenum (Mo) is an essential trace element for almost all living organisms including animals. Mo is used as a catalytic center of molybdo-enzymes for oxidation/reduction reactions of carbon, nitrogen, and sulfur metabolism. Whilst living cells are known to import inorganic molybdate oxyanion from the surrounding environment, the in vivo dynamics of cytosolic molybdate remain poorly understoo...

We report the preparation of graphene phosphonic acid (GPA) via a simple and versatile method and its use as an efficient flame retardant. In order to covalently attach phosphorus to the edges of graphene nanoplatelets, graphite was ball-milled with red phosphorus. The cleavage of graphitic C-C bonds during mechanochemical ball-milling generates reactive carbon species, which react with phospho...

The phosphonic analogue of L-phenylalanine, (/?)-(l-am ino-2-phenylethyl)phosphonic acid (A P E P ), inhibits buckwheat phenylalanine ammonia-lyase (PAL) com petitively with a K t value o f 1.5 |iM. The K, value for the (S)-enantiomer is 11.6 jj,M. The corresponding values for the enantiom ers of the phosphonous analogue are 35 and 205 |u.m , respectively. APEP inhibits the light-induced synthe...

The self-association of phosphonic acids with general formula RP(O)(OH)2 in solution state remains largely unexplored. understanding is that such molecules form multiple intermolecular hydrogen bonds, but the stoichiometry self-associates and bonding motifs are unclear. In this work, we report results study tert-butylphosphonic acid using low temperature liquid-state 1H 31P NMR spectroscopy (10...

Almost all living organisms need to obtain molybdenum from the external medium to achieve essential processes for life. Activity of important enzymes such as sulfite oxidase, aldehyde oxidase, xanthine dehydrogenase, and nitrate reductase is strictly dependent on the presence of Mo in its active site. Cells take up Mo in the form of the oxianion molybdate, but the molecular nature of the transp...

Molybdenum is an essential element for almost all living beings, which, in the form of a molybdopterin-cofactor, participates in the active site of enzymes involved in key reactions of carbon, nitrogen, and sulfur metabolism. This metal is taken up by cells in form of the oxyanion molybdate. Bacteria acquire molybdate by an ATP-binding-cassette (ABC) transport system in a widely studied process...