We next calculated the vibronically resolved emission spectra of the complexes to discern what effect if any trimethylsilyl substitution would have on the emission profile. The AH method used to evaluate the parent IrPic molecule at the beginning of this study wasn't suitable for molecules containing trimethylsilyl groups due to the change in geometry of the complex between the optimised geometries of the excited and ground states due to rotation of the trimethylsilyl groups (see Figure for a diagram showing this rotation). With this change in geometry, the Franck-Condon integrals between vibrational modes cannot be calculated. Instead, we attempted to evaluate the vibrationally resolved emission spectra using the vertical hessian (VH) method, in which the geometry at the initial state (excited state for emission) is used to calculate the vibrational frequencies of the molecule in both the initial and final states.