Synthesis and photophysical properties of some novel fluorescent dyes based on naphthalimide derivatives

摘要: Abstract A series of novel naphthalimide dyes with amino and acetylamino functional groups were synthesized through imidation, reduction acetylation reactions on 4-nitro-1,8-naphthalic anhydride. The characterized by DSC, TLC (Rf values), FTIR, 1HNMR, 13CNMR, UV–visible Fluorometery. Molar extinction coefficients wavelength maxima obtained examining dye solutions in DMF THF. results demonstrated that the have ranging from 372 to 433 nm 370 419 nm THF molar 1.1 × 104–1.9 × 104 l mol−1 cm−1 0.84 × 104–1.4 × 104 l mol−1 cm−1 absorption spectra showed grafting N-substituted naphthalimides does not affect their color whilst type substitutions C-4 position very effectively changes color. fluorescency these was evaluated Stokes shift values determined as solutions. all had fluorescence properties between 4000 6600 cm−1 3880 cm−1 6400 cm−1 Measuring quantum yields containing N-ester group highest 4-acetylamino lowest yield.