This work shows that the energy of MMCT in cyanidometal-bridged complexes can be tuned systematically by changing the auxiliary ligand of the cyanidometal bridge.
A series of tiara like structural Pdn(SR)2n (5 ≤ n ≤ 20) nanoclusters exhibit emission at 620 nm with excitation at around 268 nm. Their emission is due to ligand to metal charge transfer.