- 作者: 湯紹夏 ; 林志彪 ; 劉麟書 等
- 作者服務機構: 輔仁大學化學系
- 中文摘要: Molecular structures of three emissive annular digold compounds [ Au/sub 2/(dmpm)(dtc) ] Cl (dmpm=Me/sub 2/ PCH/sub 2/PMe/sub 2/, dtc=S/sub 2/CNEt/sub 2//sup -/) (1), [ Au/sub 2/(dppm)(dtc) ] PF/sub 6/ (dppm=Ph/sub 2/PCH/sub 2/ PPh/sub 2/) (2), and [ Au/sub 2/(dppe)(dtc) ] (PF/sub 6/)(dppe=Ph/sub 2/P(CH/sub 2/)/sub 2/PPh/sub 2/) (3), were determined. All three compounds are dimetallacycles having two gold atoms bridged by a dithiolate ligand and a diphosphine ligand, the geometry around each gold atom being almost linear. All the dimetallacyclic rings are slightly distorted from planarity with intramolecular Au-Au distances shorter than 3.0.ANG.. Compound (1) forms a polymeric chain through intermolecular Au-Au contacts (3.061-3.135.ANG. ). Compound (2) forms a tetramer through intermolecular Au-Au interactions (Au-Au distances ranging from 3.086 to 3.222.ANG.). Compound (3) is monomeric. All of the compounds luminesce at 77K in the solid state. Emissions originating from /sup 3/LMCT from dtc ligand to Au excited states are assigned. The emission maxima of 1-3 are at 541, 535 and 520nm respectively and are blue shifted as the number of Au- Au interactions is decreased.
- 英文摘要: --
- 中文關鍵字: Gold; Interaction; Molecular Aggregation; Luminescence
- 英文關鍵字: 金;相互作用;分子凝集;發光