The sensitivity of the spectral features toward temperature indicates the thermal sensing capabilities of all three Dy-complexes. The thermometric parameters -luminescent intensity ratio () was estimated as the ratio of I1/I2 ( = I 1 /I 2 ) where I1 and I2 are integrated intensity of emissions, while the thermal sensitivity (Sr) and the temperature uncertainty (𝛿T) were estimated by equations 1 and 2 respectively.