shows the synergy between the SCO and luminescent property. To describe the coupling between luminescence and SCO, variable temperature UV-Vis absorption spectra of 7 was measured in the range of 210-400 K, but the small change in the spectral intensity at 500 nm corresponding to the transition from the 1 A1→ 1 T1 of the Fe(II) LS ion in the temperature range of 210-380 K couldn't explain the large change in the PL intensity.