Table . Summary of parameters computed for 1 and its excited state dimer di-1 using BP86/def2-TZVP/B3LYP/def2-TZVP/ZORA/CPCM(CH2Cl2). Energy difference between sublevels of the lowest triplet state, also known as zero-field splitting; d Radiative decay rates of T1 sublevels 1-3 to S0 and average radiative rateplease see previous works for details. In conclusion, the presented methodology allows rapid and reliable prediction of the PL spectra of excimers and dimers of platinum(II) complexes, confirming the value of TDDFT methods for modelling electronic transitions. The presented model gives insight into the structure of said systems. It is shown that the preferred configuration of said species is headto-tail or anti. Calculations performed with SOC-TDDFT suggest that the excited bimolecular state does not display a larger triplet radiative decay rate than the respective monomeric complex despite involvement of two instead of one metal centre.