137845-40-0Relevant academic research and scientific papers
Neutral gold(I) metallosupramolecular compounds: Synthesis and characterization, photophysical properties, and density functional theory studies
Rodriguez, Laura,Lodeiro, Carlos,Lima, Joao Carlos,Crehuet, Ramon
, p. 4952 - 4962 (2009/02/02)
The reaction of the tris-indole InTREN ligand (L) with different gold phosphine fragments allows the construction of new gold(I) complexes with different geometries depending on the chosen phosphine. A metallodendrimeric structure is obtained when the gold atom is linked to a triphenylphosphine ligand, and neutral gold(I) metallocryptands are constructed when a triphosphine is used. Characterization of the compounds was accomplished by 31P{1H} and 1H NMR, IR, absorption, and fluorescence spectroscopies, electrospray ionization mass spectrometry (ESI-MS(+)), and elemental analysis, and their geometry was optimized using density functional theory (B3LYP). Time-dependent density functional theory (TD-DFT) calculations have been used to assign the lowest energy absorption bands to LMCT N(p, tertiary amine) → Au transitions. Photophysical characterization of the complexes shows strong luminescence in the solid state. The formation of heterobimetallic species has been detected in solution in the presence of equimolar quantities of metal cations, and their structures have been identified by a combination of spectroscopic methods and mass spectrometry.
Structures and luminescent properties of polynuclear gold(I) halides containing bridging phosphine ligands
Xiao, Hong,Weng, Yu-Xiang,Wong, Wing-Tak,Mak, Thomas C. W.,Che, Chi-Ming
, p. 221 - 226 (2007/10/03)
The complexes [AuI(PPh3)] 1, [Au2(μ-dppm)Cl2] 2 [dppm = bis(diphenylphosphine)methane], [Au2(μ-dppm)I2] 3, [Au3(μ-tppm)Cl3] 4 [tppm = tris(diphenylphosphino)methane], [Au3(μ-dpmp)I3] 5, [Au3(μ-dpmp)2Cl2]Cl 6 [dpmp = bis(diphenylphosphinomethyl)phenylphosphine] and [Au3(μ-dpmp)2I2]I 7 were prepared. The crystal structures of 5-7 have been established by X-ray crystal analysis. The measured intramolecular Au-Au distances are 3.136(1) A in 5, 2.946(3) and 2.963(3) A in 6 and 2.952(1) and 3.020(1) A in 7. Extended-Hueckel molecular orbital calculations revealed that the 6p orbitals of iodide and 5d orbitals of gold(I) make a significant contribution to the highest occupied molecular orbitals of 5 and of 2 and 4 respectively. The lowest unoccupied molecular orbitals of these complexes mainly comprise π* orbitals of the phosphines. The photophysical properties of 1-6 have been studied. All show dual emissions. The low-energy emissions at around 660-680 nm have a small red shift in energy from chloro to iodo complexes, and a much higher intensity at room temperature than at 77 K. These are attributed to triplet states with mixed 3m.m.l.c.t. (metal-metal to ligand charge transfer, gold→phosphine) and 3l.l.c.t. (ligand to ligand charge transfer, halide to phosphine) characters. The high-energy emissions at around 460-530 nm are more prominent at 77 K and assigned to intraligand and or 3m.l.c.t. (metal to ligand charge transfer) transitions. The temperature effects on the luminescence lifetimes of these complexes have also been studied.
Trichloro-μ3--trigold(I): Auriophilicity in a Triangle of Gold Atoms
Stuetzer, Albert,Bissinger, Peter,Schmidbaur, Hubert
, p. 367 - 372 (2007/10/02)
Trichloro-μ3--trigold(I) (1) has been prepared by treating ligand tris(diphenylphosphanyl)methane with three equivalents of chloro(dimethyl sulfide)gold(I) in dichloromethane. 1 is converted into the tribromo (2
