doi:10.1002/chem.201404058engWoodall, Christopher H.Fuertes, SaraBeavers, Christine M.Hatcher, Lauren E.Parlett, AndrewShepherd, Helena J.Christensen, JeppeTeat, Simon J.Intissar, MouradRodrigue-Witchel, AlexandreSuffren, YanReber, ChristianHendon, Christopher H.Tiana, DavideWalsh, AronRaithby, Paul R.Tunable Trimers: Using Temperature and Pressure to Control Luminescent Emission in Gold(I) Pyrazolate-Based TrimersART-2014-114337A systematic investigation into the relationship between the solid-state luminescence and the intermolecular AuAu interactions in a series of pyrazolate-based gold(I) trimers; tris(μ<inf>2</inf>-pyrazolato-N, N'')-tri-gold(I) (1), tris(μ<inf>2</inf>-3, 4, 5- trimethylpyrazolato-N, N'')-tri-gold(I) (2), tris(μ<inf>2</inf>-3-methyl-5- phenylpyrazolato-N, N'')-tri-gold(I) (3) and tris(μ<inf>2</inf>-3, 5-diphenylpyrazolato- N, N'')-tri-gold(I) (4) has been carried out using variable temperature and high pressure X-ray crystallography, solid-state emission spectroscopy, Raman spectroscopy and computational techniques. Single-crystal X-ray studies show that there is a significant reduction in the intertrimer AuAu distances both with decreasing temperature and increasing pressure. In the four complexes, the reduction in temperature from 293 to 100 K is accompanied by a reduction in the shortest intermolecular AuAu contacts of between 0.04 and 0.08 The solid-state luminescent emission spectra of 1 and 2 display a red shift with decreasing temperature or increasing pressure. Compound 3 does not emit under ambient conditions but displays increasingly red-shifted luminescence upon cooling or compression. Compound 4 remains emissionless, consistent with the absence of intermolecular AuAu interactions. The largest pressure induced shift in emission is observed in 2 with a red shift of approximately 630 cm^-1 per GPa between ambient and 3.80 GPa. The shifts in all the complexes can be correlated with changes in AuAu distance observed by diffraction.2014http://zaguan.unizar.es/record/14835110.1002/chem.201404058http://zaguan.unizar.es/record/148351oai:zaguan.unizar.es:148351Chemistry - A European Journal 20, 51 (2014), 16933-16942byhttp://creativecommons.org/licenses/by/3.0/es/info:eu-repo/semantics/openAccess