作者:Janet Braddock-Wilking、Li-Bin Gao、Nigam P. Rath
DOI:10.1039/c0dt00259c
日期:——
A series of Pt(II) complexes containing silole-based ligands with diphenylphosphino groups terminally bound to a conjugated organic linker unit coordinated to the silole ring in the 2- or 2,5-positions, 1,1-dimethyl-2-(5′-diphenylphosphino-2′-thienyl)-3,4-diphenylsilole (4), 1,1-dimethyl-2,5-bis(5′-diphenylphosphino-2′-thienyl)-3,4-diphenylsilole (5), and 1,1-dimethyl-2,5-bis(4′-diphenylphosphinophenyl)-3,4-diphenylsilole (8), have been prepared from (cod)PtX2 (X = Cl, Me, C2Ph) precursors. Mononuclear, cis-P2PtX2 (P = 4) complexes 6–7 were produced from silole 4 whereas dinuclear macrocyclic, cis-cis-X2Pt(P–P)2PtX2 (P–P = 5 or 8) complexes 9–13 were produced from siloles 5 and 8. The solid state structure of the dinuclear complex 13 obtained from reaction of (cod)Pt(C2Ph)2 with silole 8, was confirmed by X-ray crystallography. The optical properties of the siloles and the platinum complexes were studied by UV-vis and fluorescence spectroscopy in solution and were found to exhibit long wavelength absorption and emission bands attributed to the π–π* transitions of the silole core.
一系列含有硅烯基配体的铂(II)配合物,这些硅烯基配体的二苯基膦基团与共轭有机连接体单元末端结合,在硅烯环的 2- 或 2,5- 位配位,即 1,1-二甲基-2-(5′-二苯基膦-2′-噻吩基)-3、(cod)PtX2(X = Cl、Me、C2Ph)前体制备了 1,1-二甲基-2,5-双(5′-二苯基膦-2′-噻吩基)-3,4-二苯基硅烯(4)、1,1-二甲基-2,5-双(4′-二苯基膦苯基)-3,4-二苯基硅烯(8)。单核顺式-P2PtX2(P = 4)配合物 6-7 由硅烯 4 制成,而双核大环顺式-X2Pt(P-P)2PtX2(P-P = 5 或 8)配合物 9-13 则由硅烯 5 和 8 制成。(cod)Pt(C2Ph)2 与硅烯 8 反应生成的双核配合物 13 的固态结构已通过 X 射线晶体学得到证实。通过紫外-可见光谱和荧光光谱研究了硅烯和铂配合物在溶液中的光学性质,发现它们表现出长波长吸收带和发射带,这归因于硅烯核心的 π-π* 转变。