Charge-transfer resonance-enhanced Raman spectra, calculated at DFT level for three pyridine-Th@Au₁₄ complexes at three different adsorption sites, corresponding to iso1 (a), iso2 (b), and iso3 (c) as indicated by the inset in Fig. 6. The static Raman spectra for pyridine are given in panel (d). Differential cross-sections are measured in the units of 10⁻³⁰ cm²/sr, and these spectra are broadened by the Lorentzian function with a width of 20 cm⁻¹. Reproduced with permission from Ref. [8]. Copyright 2016 Springer.