Possible Interaction: Boron and Fluorides

“ Boron reduced the toxicity of fluoride on teeth.”

“These findings suggest that fluoride-containing diet for short duration has effect on nutrient utilization, and boron at 140-ppm dose level, in general, antagonized the absorption and retention of F and also improved the feed intake in buffalo calves.”

“Moreover, there was negative correlation between teeth boron and fluoride levels.”

“Negative correlation, found between boron and fluoride in all groups, was significant only in non-carious teeth group (r=-0.488, p=0.040).”

“Most interestingly, upon coordinating the boron by a fluoride ion , the ICT interactions are dramatically enlarged and the substitution position of the triphenylamino group has a negligible effect on the ICT properties of the fluoride-coordinated analogues.”

“UV/vis absorption titration studies demonstrated that the boron center of cage 6 undergoes strong binding interaction with the fluoride ion , with an estimated binding constant of 1.3 × 1010 M-2 in acetone based on the 1:2 binding isotherm.”

“Adding fluoride ions causes the boron centers to lose their accepting ability owing to complexation.”

“Binding of the fluoride ion to boron switches the fluorescence color to sky blue, while protonation of the amine with acid switches the emission color to the purple fluorescence of the acceptor chromophore.”

“The binding of fluoride ions to the boron center disrupts this charge transfer, activating alternative pi --> pi* transitions in the molecule and changing the emission color of the sample.”

“The modulation mechanism is attributed to the special Lewis acid-base interaction between a trivalent boron atom and a fluoride ion.”

“The recognition mechanism is attributed to the unique steric structure of the bulky dimesitylboryl group and the Lewis acid-base interaction between trivalent boron atom and fluoride anion.”