A new lawsone azo-dye for optical sensing of Fe3+ and Cu2+ and their DFT study. Issue 18 (16th September 2016)

• Record Type: Journal Article
• Authors: Sonawane, Mahendra; Tayade, Kundan; Sahoo, Suban K.; Sawant, Chatur P.; Kuwar, Anil
• Is Part Of: Journal of coordination chemistry. Volume 69:Issue 18(2016)
• Page Start: 2785
• Page End: 2792
• Publication Date: 2016-09-16
• Subjects: Chemosensor -- lawsone azo-dye -- Cu2+ -- Fe3+; Coordination compounds -- Periodicals; 541.2242
• DOI: 10.1080/00958972.2016.1210801
• Languages: English
• ISSNs: 0095-8972

Abstract

Abstract: 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. Receptor1 showed selective fluorescent and colorimetric response for the detection of Cu 2+ and Fe 3+ over other tested metal ions. The fluorescence intensity of1 was significantly quenched allowing detection of Fe 3+ and Cu 2+ down to 0.61 and 6.06 μM, respectively. The binding has been established by fluorescence spectroscopic method. Receptor1 provided a 1 : 1 binding scaffold for recognition of Fe 3+ and Cu 2+ ions with the association constant of 3.33 × 10 6 and 3.33 × 10 5 M −1, respectively. The B3LYP/6-31G/LANL2DZ method was employed for the optimization of1 and1 ·Fe 3+ and1 ·Cu 2+ . Abstract :