Lanthanide ions are remarkably effective catalysts for the hydrolytic cleav
age of phosphate ester bonds, including the robust bonds of DNA. This makes
Ln(lll) and Ce(IV) ions attractive candidates for developing selective and
efficient artificial nucleases, which could have many biochemical and clin
ical applications. Both small-molecule-based and biopolymer-based lanthanid
e complexes are being pursued.