Herein, we report the first 48-membered, dansyl-based, combinatorial fluorescent library.
From the electronic and structural properties of the probes, we analyzed their optical properties and
chemical yields, with an average of 49 %. The molecules were examined for their pH responses, and
DS-2 and DS-45 showed blue-shifts, whereas DS-7 and DS-40 showed red-shifts in wavelength with
increasing pH. Finally, cell permeability was investigated by treating SNU-2292 cells. Our results demonstrate the
potential application of this library in biosensors, bio-imaging and pH indicators.