La(OTf)3-mediated self-organization of guanosine with an alkynyl-Au(i)PPh3 moiety to induce Au(i)–Au(i) interactions

• DOI: 10.1039/c2ra01196d
• Publication Date: 2012-03-30T08:35:02Z
• Authors: Xiangtai Meng; Toshiyuki Moriuchi; Yuki Sakamoto; Masatoshi Kawahata; Kentaro Yamaguchi; Toshikazu Hirao
• Keywords: Moiety; Histone octamer

A bioorganometallic compound GPhAuPPh3 composed of the guanosine and alkynyl-Au(I)PPh3 moieties was prepared. The self-assembly properties in both absence presence KPF6 or La(OTf)3 were studied by NMR, UV-vis, CD fluorescence measurements. When monovalent added, expected octamer formed without any Au(I)–Au(I) interactions. This is due to bulky phosphine moiety that makes Au(I) far away each other. In contrast, trivalent La(OTf)3, a more closely stacked obtained than KPF6, leading