Journal
RSC ADVANCES
Volume 4, Issue 39, Pages 20592-20598Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ra01555j
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Funding
- Ministry of Communication and Information Technology under a grant for the Centre of Excellence in Nanoelectronics, Phase II
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A new colorimetric sensor L containing nitro-substituted indole and bisthiocarbonohydrazone units for selective fluoride and acetate ions is designed and synthesized. The receptor L shows well-defined color change in the visible region of the spectrum with an absorption band at similar to 515 nm and 506 nm, respectively, for the F- and CH3COO- ions in an acetonitrile solution. Job's plots indicated the formation of 1 : 1 (L with CH3COO-) and 1 : 2 (L with F-) complexes. The interaction of L with the F- ion undergoes a deprotonation process and release of [HX2](-), whereas with the CH3COO- ion, it forms a stable [LH2(...)X](-) complex. The relative affinities of the anions with L are rationalized using computational studies.
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