“…[8b,9d, 20] In most cases,t he dominant emitting triplet state is assumed to be of cluster-centered ( 3 CC) nature as ac onsequence of aM n (ds*!ss)e xcitation, although 3 LMMCT (ligand-to-metal-to-metal charge transfer) and 3 MMLCT (metal-to-metal-to-ligand CT) are possible,a s well, resulting in ag eometric distortion and strengthening of the metal-metal bonds. [8b,20h, 21] Although less often observed due to the inherent photoinstability,m etallophilic interactions can also be responsible for the emission properties of Ag I compounds, [22] as has been demonstrated, for example,f or silver(I) complexes on the basis of excimer formation. [10,22c-e] Fort he photostable compounds 2-7,t he luminescence mechanism can be assumed to be similar to the 3 CC emission found for Cu I clusters.…”