Studies on the synthesis and spectral properties of novel 4-benzofuranyl-l,8-naphthalimide derivatives

摘要

A new series of 4-benzofuranyl-Ar-alkyl-l,8-naphthalimides was prepared from 4-ethynyl-N-alkyl-l,8-naphthalimides and substituted omicron-iodophenols catalyzed by a Pd(PPh_3)2Cl_2/CuI system under mild conditions.The starting materials,4-ethynyl-N-alkyl-1,8-naphthalimides,were synthesized with trimethylsilylacetylene by Sonogashira coupling reaction.The absorption and fluorescence spectra of these benzofuran-l,8-naphthalimides were recorded and the quantum yields were measured using quinine sulfate as the standard.The UV/vis absorption spectra were in the range of 380-400 nm and the emission spectra were in the range of 500-520 nm.