Jian-xin Yang, Xin-liang Wang, Tusong
Oct 1, 2005
Citations
0
Influential Citations
40
Citations
Journal
Dyes and Pigments
Abstract
Abstract A new series of 4-benzofuranyl- N -alkyl-1,8-naphthalimides was prepared from 4-ethynyl- N -alkyl-1,8-naphthalimides and substituted o -iodophenols catalyzed by a Pd(PPh 3 ) 2 Cl 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-1,8-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.