The PL spectra at room temperature show a narrow emission band centering around 359 nm and a broad structured band between 450 and 565 nm with several maxima for L1 ligand and 1, respectively, confirming significantly different PL behavior of both species. Variable temperature PL studies of 1 revealed a weak and stable luminescence of 1 at low-temperature region (90 -250 K) during increasing temperature, while a sharp increase in the PL intensity (I493 = luminescence intensity of the maximum emission at 493 nm) was observed in the region of 250 to 280 K which remain almost constant upon increasing the temperature further up to 330 K. The abrupt luminescence enhancement at around SCO temperature T1/2 = 262 K suggested a synergistic correlation between the luminescence and SCO properties in 1. Moreover, a detailed theoretical calculation suggested an LS-HS spin-state switching regulated metal-to-ligand charge transfer (MLCT) based luminescence in 1. In principle, the luminescence of 1 happened to be too weak to be suitable for practical applications.