Swa. Bligh et al., Dimeric yttrium(III) and neodymium(III) macrocyclic complexes: potential catalysts for hydrolysis of double-stranded DNA, J CHEM S DA, (21), 2001, pp. 3169-3172
Citations number
11
Categorie Soggetti
Inorganic & Nuclear Chemistry
Journal title
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS
Dimeric complexes of macrocycle L, [{ML(OH)(H2O)}(2)](NO3)(4) where M = Y a
nd Nd, have been prepared via template synthesis. X-Ray structural analysis
of [{YL(OH)(H2O)}(2)](4+) showed each yttrium atom to be coordinated to si
x nitrogens in the macrocycle, two hydroxide bridging units and one water m
olecule; the two macrocycles within the dimer have virtually identical conf
ormations. Both dimeric complexes have the remarkable ability to degrade ds
DNA, while the corresponding monomers have no activity. Cleavage likely inv
olves random attack at single strands, in which closed circular plasmid DNA
is initially converted to a nicked DNA intermediate before final cleavage.