Novel anion fluorescent probe with two 1,8-naphthalimide fluorophores

ORGN 431

Fengyu Liu, fengyu.liu@yahoo.com.cn, Department of Chemistry, Dalian University of Technology, Ligong Road 2, Dalian, 116024, China and Shiguo Sun, shiguo@dlut.edu.cn, State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, 116012, China.
Two novel anion fluorescent probes 1a and 1b were designed and synthesized. In the structures, two 1,8-naphthalimide fluorophores were connected with phthalic acid and isophthalic acid through ethylenediamine, here ethylenediamine was used as recognition acceptor and four hydrogens on imino group were intended to act with anion through hydrogen bond, to study the effect on selectivity and sensitivity of anion recognition caused by different distance between the two ethylenediamine recognition acceptors. Their absorption and emission spectra were detected in DMSO at room temperature. The recognition ability to different anions such as HSO4-, CH3COO-, H2PO4-, F- and NO3- etc. was also studied.