Eu(III) complex of a macrocyclic ligand derived from 2,2′-bipyridine and iminodiacetic acid: Synthesis, luminescence and phosphate diester transesterification properties
A very convenient synthesis of a macrocyclicligand bearing two endocyclic amide and two exocyclic carboxylate groups (lanthanide binding sites) and one sensitizer (2,2′-biphridine unit) is described. It is shown that the corresponding Eu(III) complex bearing a single positive charge and incorporating two water molecules in the first coordination sphere of the metal ion is strongly fluorescent on the
Synthesis of RNAse active site model systems using a steroid template
作者:Thorsten Oost、Markus Kalesse
DOI:10.1016/s0040-4020(97)00526-7
日期:1997.6
which guanidinium and imidazole moieties, necessary for the transesterification/cleavage, are assembled. By changing the stereochemistry at C11 of 2, and varying the guanidinium side chains, active compounds 9, 11, 13, 15 with different hydrolytic behavior are obtained. Comparison of the steroid compounds clearly demonstrates that changes in the geometry can influence the cleavage reaction of RNA analogs
Guanidine based self-assembled monolayers on Au nanoparticles as artificial phosphodiesterases
作者:Riccardo Salvio、Antonio Cincotti
DOI:10.1039/c4ra03150d
日期:——
Gold nanoparticles passivated with a catalytic monolayer based on guanidine exhibit high cooperativity and efficiency in the cleavage of phosphodiesters.
Polymerbrushesgrafted to the surface of silicananoparticles were fabricated by atom‐transfer radical polymerization (ATRP) and investigated as catalysts in the cleavage of phosphodiesters. The surfaces of silicananoparticles were functionalized with an ATRP initiator. Surface‐initiated ATRP reactions, in varying proportions, of a methacrylate moiety functionalized with a phenylguanidine moiety
Uranyl (UO
2
2+
) cations mediate the hydrolysis of
aggregated and non-aggregated p-nitrophenyl phosphodiesters in
mildly acidic aqueous solutions (pH 4.9) with rate enhancements >1000
at 37 °C.