Question

Redshift and blueshift in transition metals compound

Answer 1

Red shift is caused when excited state is more polar as compared to ground state so the polar solvents stabilize excited state more than ground state. So overall there is decrease in the energy gap between excited and ground state resulting in red shift. When ground state is more polar than excited state, the polar solvents stabilize  ground state more than  excited state. So overall there is increase in the energy gap between excited and ground state resulting in blue shift.