A notable bathochromic shift was observed in fluorescence emission maxima for 38 (534 nm) as compared to free L19 (462-480 nm) at 150 K. As the temperature increased, the fluorescence emission intensity of 38 gradually lowered, which was well in agreement with the thermal quenching as expected. However, with increase in temperature above 210 K, the fluorescence intensity started to enhance exceptionally and reached a maxima at 250 K, and then decreased further (Fig. ). For 39, the abnormal emission behavior was observed from 210-290 K (Fig. ). Also, it showed a red shift of 28 nm as temperature increased from 170 to 300 K. The complete desolvated solid sample of 39 showed the red shift of 29 nm in 100-150 K which defined that the structural variation was responsible for the gradual SCO. Hence, the experimental outcomes revealed that the complexes 38, 39, and desolvated 39 exhibited synergic fluorescence-SCO correlations.