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Synthesis and Fluorescent Property Study of Novel 1,8-Naphthalimide-Based Chemosensors
Ying Fu1, Xiao-Xiao Pang2, Zhi-Qiang Wang3
1Department of Applied Chemistry, College of Science, Northeast Agricultural University, Harbin 150030, China. fuying@neau.edu.cn.
Abstract:
A series of novel mono- and di-substituted N-n-butyl-1,8-naphthalimide derivatives were synthesized simultaneously via a three-step reaction. The single crystal structure of N-n-butyl-4-[N',N'-bis(2',4'-dichlorobenzoyl)ethylamino]-1,8-naphthalimide (3f) was determined. The UV-vis and fluorescence properties of compound 3f were investigated. The 3f showed highly selective and sensitive fluorescence changes response towards Pb2+. A titration of monomer with Pb2+ ion was performed. When Pb2+ ion concentration increased from 0 to 10 eq., the fluorescent intensity of 3f decreased from 199.97 to 48.21. The pH effect on 3f showed that it is stable in a wide range of pH. The results indicated that 3f might be a probe molecule for Pb2+.
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