To correlate the SCO process and luminescence, variable temperature fluorescence emission spectroscopy was measured in the range of 100 K and 300 K. For complex 8, two fluorescence emission peaks at 441 nm and 465 nm were observed, and the relative intensities of the two bands gradually increase in the temperature range of 100-220 K, which is well consistent with the magnetic data. For complex 9, the intensity of the emission band at 457 nm shows a similar trend when going from 190 K to 320 K, correlating with the thermally induced spin transition process.