Fluoride alumino complexes

Fluoride is assumed to complex with aluminium in the form of alumino-fluoride ions (AIF2+ and AIF2+), and such complexes are dissociated in TISAB to liberate all of the fluoride as free F ions. This is consistent with the observation that ion release under acidic conditions tends to show proportionately greater aluminium release yet lower amounts of free fluoride [251],... 

Resin-modified glass-ionomers, like their conventional counterparts, are capable of releasing fluoride [224,264,265], and in greater amounts under acid conditions than neutral ones [265], Release rates and release profiles have been shown to be comparable with those from conventional glass-ionomer cements [264,265], Other ions have also been shown to be released by these materials and, as for fluoride, these ions show a greater release under low pH conditions [265], However, the level of phosphorus released has been shown to be much lower from resin-modified glass-ionomers than from conventional ones [263], This suggests that there is little or no possibility of association of fluoride as monofluorophosphate, but rather that almost all of the fluoride is released either as the free fluoride ion or as alumino-fluoride complex ions. 

S)-[ F]fluoroethylcarazolol 8, 111 subtypes of, 100 Adriamycine (doxorubicine), 589 Agrochemical agents, 215 AIF. See Aluminium monofluoride Aliphatic nucleophilic substitution, 28 Alkenes, as amide bond substitutes, 702-703 Alkenes fluorination, 18 Allyl hydrazines as SSAO inhibitors, 674 Aluminium monofluoride, 534 Alumino-fluoride complexes, 364 Alzheimer s disease (AD)... 

HF is weakly ionized (pH <3.2), and soluble alumino-fluoro complexes are formed resulting in the presence of aluminum ions in the treated water and lowering of the active sites. At near neutral pHs, the uptake of fluoride is maximum. Assuming that the pHpzc of AA is about 8-9 as reported in several literatures, then at near neutral pHs the active sites consist of = AI-OH (protonated) and = AI-OH (non-protonated) aluminol sites. The interaction between fluoride and the protonated aluminol sites leads to the formation of inner-sphere complexes and elimination of water. The reaction can be represented by... 

IV - 10 Oxyhalides and hydroxyhalides IV - 11 Halide complexes alumino-fluorides IV - 12 Compound halides... 

---