148351 20250116161254.0 doi 10.1002/chem.201404058 sideral 114337 ART-2014-114337 eng Woodall, Christopher H. Tunable Trimers: Using Temperature and Pressure to Control Luminescent Emission in Gold(I) Pyrazolate-Based Trimers 2014 A 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(Œº<inf>2</inf>-pyrazolato-N, N'')-tri-gold(I) (1), tris(Œº<inf>2</inf>-3, 4, 5- trimethylpyrazolato-N, N'')-tri-gold(I) (2), tris(Œº<inf>2</inf>-3-methyl-5- phenylpyrazolato-N, N'')-tri-gold(I) (3) and tris(Œº<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. Access copy available to the general public Unrestricted info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 5.731 2014 CHEMISTRY, MULTIDISCIPLINARY 22 / 154 = 0.143 2014 Q1 T1 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Fuertes, Sara (orcid)0000-0003-1812-3175 Beavers, Christine M. Hatcher, Lauren E. Parlett, Andrew Shepherd, Helena J. Christensen, Jeppe Teat, Simon J. Intissar, Mourad Rodrigue-Witchel, Alexandre Suffren, Yan Reber, Christian Hendon, Christopher H. Tiana, Davide Walsh, Aron Raithby, Paul R. 20, 51 (2014), 16933-16942 Chemistry (Weinh.) Chemistry - A European Journal 0947-6539 1559997 http://zaguan.unizar.es/record/148351/files/texto_completo.pdf Versión publicada 2922409 http://zaguan.unizar.es/record/148351/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:148351 articulos driver 2025-01-16-14:31:47 ARTICLE