(ii) an MM solvation shell with point charges of -0.6690 and +0.3345 representing the oxygen and hydrogen atoms in water and +1 representing sodium atoms. The range-separated CAM-B3LYP exchange-correlation functional 56 was adopted throughout the present work with the original parameter settings of α = 0.19, β = 0.46, and ω = 0.33. In CPP calculations, the program default damping parameter of γ = 0.1240 eV (or 1,000 cm -1 ) was adopted; in calculations using the generalized eigenvalue solver, the corresponding half-width at half-maximum (HWHM) parameter was used for the spectral broadening of the rotatory strengths.