for 2). These complexes exhibited distinct emissive properties, giving a value of Sr)max at 1.09 % K -1 (15 K), 2.98 % K -1 (13 K) and 0.81 % K -1 (300 K) for complexes 1 -3, respectively. All three complexes showed zero field SMM behaviour with unique relaxation features, and Ueff is in the range of 129(8) to 257(6) K. Thus, we have successfully visualised the electronic effect of the ligands in tuning the magnetic and optical properties by varying the second coordination sphere.