RETRACTED: Synthesis and studies of selective chemosensor for naked-eye detection of anions and cations based on a new Schiff-base derivative

Orojloo, Masoumeh; Amani, Saeid

doi:10.1016/j.talanta.2016.06.042

Cited by 22 publications

(7 citation statements)

References 60 publications

(44 reference statements)

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“…The sensitivity of L 1 towards these anions followed the sequence of OH − >C 2 O 2− 4 >F − in the 1:1 mixture and OH − >F − >CH 3 COO − >C 2 O 2− 4 in the 4:1 mixture. To understand the binding between the receptor and these anions, increasing amounts (9,18,27,36,45,54,63,72,81,90, and 242 equivalents) of ions were added to the receptor solution. and OH − ions were added to the receptor solution, the bands red-shifted, the intensity gradually decreased, and the strong band at 350 nm became a hump at~54 equiv.…”

Section: Uv-vis Titrationmentioning

confidence: 99%

Synthesis of novel azo linkage-based Schiff bases including anthranilic acid andhexanoic acid moieties: investigation of azo-hydrazone and phenol-ketotautomerism, solvatochromism, and ionochromism

Özdemir¹

2019

Turk J Chem

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Section: Uv-vis Titrationmentioning

confidence: 99%

Synthesis of novel azo linkage-based Schiff bases including anthranilic acid andhexanoic acid moieties: investigation of azo-hydrazone and phenol-ketotautomerism, solvatochromism, and ionochromism

Özdemir¹

2019

Turk J Chem

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“…Therefore, designing colorimetric probes such as azo –azomethine compounds for detection of metal ions and anions has attracted significant research interest. Because they bind to anions or form complexes with metal ions and so change the color of solution or maxima of the absorbance band …”

Section: Introductionmentioning

confidence: 99%

New Chloro‐Based Azo‐Azomethine Dyes: Synthesis, Biological and Optical Spectroscopic Studies for Detection of some Transition Metal Ions

Shaghaghi

Rezanezhad

2018

ChemistrySelect

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Two new chromogenic receptors 1,2-[1-(3-imino-4-hydroxophenylazobenzene)]-4-chlorobenzene (1 a) and 1,2-[1-(3-imino-4hydroxophenylazo-4-nitrobenzene)]-4-chlorobenzene (1 b) have been designed and chearcterized for detection of some transition metal ions in DMSO solution by UV/Vis spectroscopy. Upon addition of Cd 2 + , Zn 2 + and Cu 2 + ions to 1 a in DMSO, the peak at 460 nm increases in intensity, while the band at 352 nm decreases in intensity and approximately disappears. n!p* transition of azo groups of 1 a decreases in intensity after adding Hg 2 + ions and does not change after adding Ni 2 + ions. This indicates high tendency of 1 a towards Cd 2 + , Zn 2 + and Cu 2 + against Ni 2 + and Hg 2 + ions. Compound 1 b shows some color changes after addition of metal ions. Upon addition of all metal ions to 1 b in DMSO, the band at 560 nm increases in intensity with the hypsochromic shift for Cu 2 + , Zn 2 + , Co 2 + and Ni 2 + . But the largest blue shift (-67 nm) is seen after adding Cu 2 + ion with remarkable color change from violet-green to orange. Benesi-Hildebrand plot and Job's method are used for determination of binding constant (K a ) and stoichiometry of formed complexes with 1 b. Then, complex Cu(II) with 1 b is synthezied for recognition of binding sites of ligand. The results indicate that 1 b behaves as one tetradentate ligand with N and O donor atoms when bound to Cu(II). Moreover, the study of antioxidant properties of 1 a and 1 b with DPPH method reveals good and significant activity.[a] Dr.

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“…3). These pronounced shifts of the maximum absorption wavelength could be ascribed to the coordination of ions with imine nitrogens of molecule [47]. In contrast, after adding of other cations, no selective response exhibited in absorption spectra of T 1 .…”

Section: Sensing Properties Of Tmentioning

confidence: 90%

Studies on phenol-keto tautomerism, metal ion binding, and free radical scavenging properties of newly synthesized naphthalene-based tetraimine Schiff base

Özdemir¹

2018

Balıkesir Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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RETRACTED: Synthesis and studies of selective chemosensor for naked-eye detection of anions and cations based on a new Schiff-base derivative

Cited by 22 publications

References 60 publications

Synthesis of novel azo linkage-based Schiff bases including anthranilic acid andhexanoic acid moieties: investigation of azo-hydrazone and phenol-ketotautomerism, solvatochromism, and ionochromism

Synthesis of novel azo linkage-based Schiff bases including anthranilic acid andhexanoic acid moieties: investigation of azo-hydrazone and phenol-ketotautomerism, solvatochromism, and ionochromism

New Chloro‐Based Azo‐Azomethine Dyes: Synthesis, Biological and Optical Spectroscopic Studies for Detection of some Transition Metal Ions

Studies on phenol-keto tautomerism, metal ion binding, and free radical scavenging properties of newly synthesized naphthalene-based tetraimine Schiff base

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