A highly selective and sensitive Fe³⁺ fluorescent sensor by assembling three 1,8-naphthalimide fluorophores with a tris(aminoethylamine) ligand

详细信息    查看全文

• 作者：Liang Yang^a ; ^b ; ^c ; ^d ; Wen Yang^a ; ^b ; ^c ; ^d ; Dongmei Xu^a ; ^b ; ^c ; ^d ; ^{xdm.sd@163.com} ; Zhiyuan Zhang^a ; ^b ; ^c ; ^d ; Aifeng Liu^a ; ^b ; ^c ; ^d
• 关键词：Dendrimer-type ; 1 ; 8-Naphthalimide ; Fluorescent sensor ; Fe3+ ion ; Turn-on
• 刊名：Dyes and Pigments
• 出版年：2013
• 出版时间：April, 2013
• 年：2013
• 卷：97
• 期：1
• 页码：168-174
• 全文大小：1373 K

文摘

A fluorescent dye with three 1,8-naphthalimide units has been readily synthesized from 1,8-naphthalic anhydride and tris(2-aminoethyl)amine. Its photophysical properties in organic solvents with different polarity have been studied and its fluorescent sensor activity to metal ions was carefully investigated. The sensor showed high selectivity to Fe³⁺ by fluorescence quenching in DMF, and exhibited very good selectivity and sensitivity to Fe³⁺ in DMF/H₂O (volume ratio 4:1 and 2:3) by easily detected fluorescence enhancement. The binding stoichiometry indicated that a 1:1 complex was formed between Fe³⁺ and the sensor in DMF/H₂O (volume ratio 2:3). The binding mechanism was studied by IR and ¹H NMR spectroscopic techniques.