Rigid 5′-6-locked phenanthroline-derived nucleosides chelated to ruthenium and europium ions
作者:Kristmann Gislason、Snorri Th. Sigurdsson
DOI:10.1016/j.bmcl.2012.10.104
日期:2013.1
We describe complexes of ruthenium and europium with rigid, 5'-6-locked 1,10-phenanthroline-containing nucleosides. Both nucleosides were synthesized from condensation of 5-amino-2'-deoxycytidine with the corresponding diketone. The ruthenium nucleoside displayed fluorescence characteristic of polypyridine ruthenium complexes with a maximum at 616 nm and a quantum yield of 0.011. Binding of europium to the 1,10-phenanthroline-2,9-diacid moiety of the lanthanide binding nucleoside showed formation of a 1: 1 complex with emission at 570-630 nm, whose emission was enhanced by addition of two phenanthroline ligands. The lanthanide-binding nucleoside was incorporated into DNA oligonucleotides and shown to selectively bind one equivalent of europium ions. (c) 2012 Elsevier Ltd. All rights reserved.