A new lawsone azo-dye for optical sensing of Fe3+ and Cu2+ and their DFT study

作者：Sonawane Mahendra; Tayade Kundan; Sahoo Suban K; Sawant Chatur P; Kuwar Anil^*

来源：Journal of Coordination Chemistry, 2016, 69(18): 2785-2792.

DOI：10.1080/00958972.2016.1210801

• Chemosensor
• lawsone azo-dye
• Cu2+
• Fe3+

A new lawsone-based azo-dye 2-hydroxy-3-((pyridin-2-ylmethyl)diazenyl) naphthalene-1,4-dione (1) was synthesized and applied for sensing of metal ions. Receptor 1 showed selective fluorescent and colorimetric response for the detection of Cu2+ and Fe3+ over other tested metal ions. The fluorescence intensity of 1 was significantly quenched allowing detection of Fe3+ and Cu2+ down to 0.61 and 6.06 mu M, respectively. The binding has been established by fluorescence spectroscopic method. Receptor 1 provided a 1 : 1 binding scaffold for recognition of Fe3+ and Cu2+ ions with the association constant of 3.33 x 10(6) and 3.33 x 10(5) M-1, respectively. The B3LYP/6-31G/LANL2DZ method was employed for the optimization of 1 and 1.Fe3+ and 1.Cu2+.
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• 出版日期2016