Synthesis, spectroscopic characterization and thermal studies of some lanthanide(III) nitrate complexes with a hydrazo derivative of 4-aminoantipyrine

Mohanan, K.; Athira, C.J.; Sindhu, Y.; Sujamol, M.S.

doi:10.1016/s1002-0721(08)60320-8

Cited by 16 publications

(4 citation statements)

References 23 publications

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“…Figure S1 (a) shows a 1 H NMR spectrum of the SBL complex that exhibits a specific signal at 12.23 ppm due to NH protons, and the signal in the range of 8.0–8.7 ppm is attributed to azomethine protons. A signal is also observed in the 6.63–8.29 ppm region due to aromatic protons 40 , 41 . From a 13 C NMR spectrum (Figure S1b ), SBL exhibits a specific signal at 165.37 ppm due to azomethine carbon 42 , 43 .…”

Section: Resultsmentioning

confidence: 97%

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In vitro cytotoxicity activity of novel Schiff base ligand–lanthanide complexes

Andiappan

Sanmugam

Easwaramoorthy

et al. 2018

Sci Rep

126

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A Schiff base ligand (SBL), N2, N3-bis (anthracen-9-ylmethylene) pyridine-2, 3-diamine, was synthesized through the condensation of 2,6-diaminopyridine and anthracene-9-carbaldehyde using a 1:2 ratio. 1H NMR spectra confirmed the observation of non-involvement aromatic carboxylic proton in SBL. A novel series of lanthanide (i.e., praseodymium (Pr), erbium (Er), and ytterbium (Yb))-based SBL metal complexes was successfully synthesized, and their functional groups were elaborately demonstrated using UV–visible, Fourier transform infrared (FT-IR), and fluorescence spectroscopy analyses. FT-IR spectral studies revealed that SBL behaved as a bidentate ligand and it was structured with metal ions by the two azomethine nitrogens. The synthesized SBL-based metal complexes were elaborately performed for cytotoxicity activity versus Vero, human breast cancer (MCF7), and cervical (HeLa) anticancer cell lines.

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Section: Resultsmentioning

confidence: 97%

“…Likewise, Mohanan et al . have demonstrated the cytotoxicity behavior of crocin–metal nanoparticles against MCF7 cells after 24 and 48 h growth 40 . The observed results from the present study against MCF7 and HeLa cell lines treated with SBLPr and SBLEr (at 25 μg/ml) revealed cell death up to ~49% and ~42–51%, respectively.…”

Section: Resultsmentioning

confidence: 99%

In vitro cytotoxicity activity of novel Schiff base ligand–lanthanide complexes

Andiappan

Sanmugam

Easwaramoorthy

et al. 2018

Sci Rep

126

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“…Schiff bases are one of the most prevalent ancillary ligands in organometallic chemistry. These materials which have oxygen and nitrogen donor atoms operate as good chelating agents for transition metals . Their metal complexes have a variety of biological, medicinal and analytical applications, in addition to their important roles in catalysis and organic syntheses …”

Section: Introductionmentioning

confidence: 99%

Synthesis of a series of new ruthenium organometallic complexes derived from pyridine‐imine ligands and their catalytic activity in oxidation of secondary alcohols

Hao

et al. 2018

Applied Organom Chemis

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Reactions of pyridine imines [C5H4N‐2‐C(H) = N‐C6H4‐R] [R = H (1), CH3 (2), OMe (3), CF3 (4), Cl (5), Br (6)] with Ru3(CO)12 in refluxing toluene gave the corresponding dinuclear ruthenium carbonyl complexes of the type {μ‐η2‐CH[(2‐C5H4N)(N‐C6H4‐R)]}2Ru2(CO)4(μ‐CO) [R = H (7); CH3 (8); OMe (9); CF3 (10); Cl (11); Br (12)]. All six novel complexes were separated by chromatography, and fully characterized by elemental analysis, IR, NMR spectroscopy. Molecular structures of 7, 10, 11, and 12 were determined by X‐ray crystal diffraction. Further, the catalytic performance of these complexes was also tested. The combination of {μ‐η2‐CH[(2‐C5H4N)(N‐C6H4‐R)]}2Ru2(CO)4(μ‐CO) and NMO afforded an efficient catalytic system for the oxidation of a variety secondary alcohols.

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“…Azo dyes derived from 2-aminothiophene derivatives have many advantages, including a colour deepening effect as an intrinsic property of the thiophene ring, a small molecular structure leading to better dyeability and the heterocyclic structure of thiophene ring resulting in good sublimation fastness of dyed fibres. 1,[8][9][10][11] However, due to the instability of aminothiophene, lanthanide(III) complexes of azo dyes formed from 2 or 3-aminothiophene have hitherto only received sporadic attention. The diazo components of 2-aminothiophene derivatives tend to show a bathochromic shift and high tinctorial strength, when compared to analogous dyes derived from a cyclic aromatic system.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and spectroscopic characterization of some lanthanide(III) nitrate complexes of 3-[3-carboxyethyl-4,5- dimethylthiophene-2-yl)azo]pent-2,4-dione

Athira

Sindhu

Sujamol

et al. 2011

JSCS

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Ethyl 2-[2-(1-acetyl-2-oxopropyl)azo]-4,5-dimethyl-3-thiophenecarboxyate was synthesized by coupling diazotized ethyl 2-amino-4,5-dimethylthiophene-3-carboxylate with acetylacetone. Based on various spectral studies and elemental analysis, an intramolecularly hydrogen-bonded azo-enol structural form was assigned for the ligand. This ligand is versatile in forming a series of lanthanide(III) complexes, viz., lanthanum(III), cerium(III), praseodymium(III), neodymium(III), samarium(III) and gadolinium(III), which were characterized through various spectral studies, elemental analysis, magnetic susceptibility measurements, molar conductance and thermal analysis. The spectral data revealed that the ligand acted as a neutral tridentate, coordinating to the metal ion through one of the azo nitrogen atoms, the ester carbonyl and the enolic oxygen of the acetylacetone moiety, without deprotonation. Molar conductance values adequately supported their non-electrolytic nature. The ligand and lanthanum(III) complex were subjected to X-ray diffraction studies. In addition, the lanthanum(III) complex underwent a facile transesterification reaction on refluxing with methanol for a long period. The thermal behaviour of the lanthanum(III) complex was also examined.

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Synthesis, spectroscopic characterization and thermal studies of some lanthanide(III) nitrate complexes with a hydrazo derivative of 4-aminoantipyrine

Cited by 16 publications

References 23 publications

In vitro cytotoxicity activity of novel Schiff base ligand–lanthanide complexes

In vitro cytotoxicity activity of novel Schiff base ligand–lanthanide complexes

Synthesis of a series of new ruthenium organometallic complexes derived from pyridine‐imine ligands and their catalytic activity in oxidation of secondary alcohols

Synthesis and spectroscopic characterization of some lanthanide(III) nitrate complexes of 3-[3-carboxyethyl-4,5- dimethylthiophene-2-yl)azo]pent-2,4-dione

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