Development of fluorochromic polymer doped materials as platforms for temperature sensing using three dansyl derivatives bearing a sulfur bridge

Three novel bis-dansyl derivatives bearing a sulfur bridge have been synthesized, fully characterized, and their photophysical characterization studied in solution, as well as, the solid state. All compounds exhibit fluorescence emission with quantum yields up to 60%, which vary significantly depending on solvent used, inherent molecular structure. Moreover, these demonstrate positive solvatofluorochromic behaviour emitting from bluish-green yellow. Kamlet-Taft studies were performed better understand solute–solvent interactions. Due intrinsic characteristics of compounds, efforts made potential usefulness for environmental remediation thus metal ion sensing investigated. Compounds L1 L2 showed high sensitivity Cu2+ Hg2+ ions found modulate extensively, capable detecting quantifying 4 µM Hg2+. Considering solid-state application towards temperature was put forth. L3 quench its linear relation 170 °C. Several doped polymer thin films fabricated, served platform establish beyond melting point. Polymethylmetacrylate (PMMA) emitted temperatures 218 °C, could be restored at room temperature. These results suggest bis-chromophoric thermometers.