In order to understand the excited state behavior of the complexes in different solvents, the photoluminescence and time-resolved studies were performed. The photoluminescence spectra of all the complexes were recorded in THF, ACN and DMF at excitation of 392 nm (concentration = 10 M) as shown in figure and figure S32-S33, Table -S4. The emission maxima of the complexes show bathochromic shifts from 461 nm in THF to 467 nm in ACN and DMF. The small 6 nm red shift in emission with increasing solvent polarity suggests that the excited state is weakly charge transfer in nature (Figure and).