Different structural preference of Ag() and Au() in neutral and cationic luminescent heteropolynuclear platinum() complexes: Z (U)-shaped PtM type . trinuclear PtM type

• Published in: Dalton transactions : an international journal of inorganic chemistry 2016-03, Vol.45 (12), p.4978-4982
• Main Authors: Nishihara, Kazuki, Ueda, Misa, Higashitani, Ami, Nakao, Yoshihide, Arikawa, Yasuhiro, Horiuchi, Shinnosuke, Sakuda, Eri, Umakoshi, Keisuke
• Format: Article
• ISSN: 1477-9226; 1477-9234
• DOI: 10.1039/c6dt00320f

The reactions of monocationic Pt( ii ) complexes bearing N^C chelate ligands and Me 2 pzH, [Pt(N^C)(Me 2 pzH) 2 ]PF 6 (N^C = 2-phenylpyridinate (ppy − ), 2-(2,4-difluorophenyl)pyridinate (dfppy − ), benzo[ h ]quinolinate (bzq − ); Me 2 pzH = 3,5-dimethylpyrazole), with Ag( i ) ions gave Z (or U)-shaped neutral tetranuclear Pt 2 Ag 2 complexes [Pt 2 Ag 2 (N^C) 2 (Me 2 pz) 4 ], while those with Au( i ) ions gave neutral trinuclear PtAu 2 complexes [PtAu 2 (N^C)(Me 2 pz) 3 ]. On the contrary, the reactions of the dicationic Pt( ii ) complex bearing a N^N chelate ligand and Me 2 pzH, [Pt(bpy)(Me 2 pzH) 2 ](PF 6 ) 2 (bpy = 2,2′-bipyridine), with Ag( i ) and Au( i ) ions both gave Z (or U)-shaped dicationic tetranuclear Pt 2 M 2 complexes, [Pt 2 M 2 (bpy) 2 (Me 2 pz) 4 ](PF 6 ) 2 (M = Ag, Au). The structures of heteropolynuclear Pt( ii ) complexes were dominated by the nature of incorporated group 11 metal ions and the charge of complexes. The structural preference and photophysical properties of heteropolynuclear Pt( ii ) complexes are reported.