It has previously been shown that using an appropriate embedding scheme to describe the MM region can considerably reduce the size of the QM region and thus the computational time without compromising accuracy. Any deficiencies in reproducing the spectra found in this first part of the study will be attempted to be corrected for using a bottom-up approach by including more solvent molecules in the QM region, or as shown in the last part of the section, though the exciton approch .