Raman studies of pressure‐induced frequency shifts in d0‐ and d8‐naphthalene

Abstract
The influence of hydrostatic pressure on lattice vibrations in single‐crystals of d0‐ and d8‐naphthalene has been measured by observations of their first‐order Raman scattering spectra at pressures in the range 0‐8.5 kbar. Measurements were performed at room temperature for both the external and the internal vibrations. Mode Grüneisen parameters γi in the range 3‐4.5 and 0.004‐0.25 have been derived for external and internal modes, respectively.