“…[1][2][3] A wide variety of solid-state physical properties for many different materials have been reported, as described in a number of extensive reviews with detailed bibliographies covering applications in chemistry, materials science and physics, as well as the experimental methodology, in particular for spectroscopic measurements. [2][3][4][5][6][7][8] Transition metal complexes are particularly attractive for the study of pressure effects, due to their high symmetry structures with many possibilities for subtle variations induced by relatively modest pressures and their electronic structure with degenerate and nondegenerate electronic states. Luminescence and absorption spectra of many transition metal compounds, including organometallic molecules, have been measured and pressure-induced variations have been reported for the energies of their band maxima.…”