Because of their remarkable and unmatched optical and magnetic properties, the lanthanides are under the limelight when it comes to high technology. These elements are used in strategic application...

Review: Lanthanide coordination chemistry: from old concepts to coordination polymers

Selective leaching of rare earth elements from bauxite residue (red mud), using a functionalized hydrophobic ionic liquid

Saturation kinetics are measured with all lanthanides and bis(nitrophenyl) phosphate BNPP as substrate. They show rather constant KM values; the kcat values, however, increase by up to 66 times for La3+ to Er3+ and decrease again for Yb3+ and Lu3+. With all lanthanides, hydrolysis of the intermediate mononitrophenyl phosphate NPP is 2−30 times faster than that of BNPP. The kcat values measured with BNPP correlate with the ion diameter of the lanthanides, in line with accepted mechanisms but with the notable exception of the higher lanthanides. A similar correlation holds for the cleavage rates with plasmid DNA, with striking differences again observed with the higher lanthanides, however. Thus, a concentration increase from 5 × 10-5 to 1 × 10-2 M leads to 64% and 84% more DNA cleavage with La3+ and Pr3+, respectively, but to up to 68% less DNA cleavage, respectively, but with Yb3+, Tm3+ or Lu3+. In contrast to the BNPP cleavage, saturation kinetics derived kcat values with DNA change little with the used ...

Unusual Catalyst Concentration Effects in the Hydrolysis of Phenyl Phosphate Esters and of DNA: A Systematic Investigation of the Lanthanide Series1

Chapter 103 Hydration and hydrolysis of lanthanides

Chapter 127 Lanthanides and actinides hydration and hydrolysis

The precipitation pH values of fourteen lanthanoid (III) hydroxides were determined. The hydroxide ion was supplied electrolytically in aqueous solutions of potassium nitrate, and the formation of the insoluble hydroxide was detected through the optical scattering method. The precipitation pH values ranged from 7.47 to 5.74 between lanthanum and lutetium. Discussions are made in connection with some inherent values of the lanthanoid metal ions.

Masaki Sekine

Papers

Precipitation incidence of the lanthanoid(III) hydroxides