Synthesis, characterization and properties of salicylhydrazide–salicylacylhydrazone derivatives and their terbium complexes

Meng, Defen; Fen, Liu; Li, Yingying; Yang, Zhen; Li, Guizhi; Guo, Dongcai

doi:10.1002/bio.2989

Cited by 6 publications

(3 citation statements)

References 19 publications

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“…of Zn(II) complexes (-1.0V to 1.0V) were characterized by a reversible redox process for (L4)2Zn, and an irreversible (both cathodic and anodic) method for the remaining six complexes (L1)2Zn-(L3)2Zn and (L5)2Zn -(L7)2Zn. Voltammetry curves of complex (L4)2Zn were characterized by one reversible redox process at -0.07/-0.15 V, (E½ = -0.11) vs. Ag+/AgCl, which was assigned to the nitro group, previously reported for other aromatic derivatives47 . The remaining six complexes exhibit two irreversible (cathodic and anodic) processes.…”

mentioning

confidence: 52%

Microwave-assisted synthesis, spectral characterization and DFT studies of Zn(II) complexes based on N-acylhydrazone ligands: stability and antioxidant activity

Santos¹,

Henriques²,

Lopes³

et al. 2023

Mediterr.J.Chem.,

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This article reports the synthesis of seven Zn(II) complexes containing N-acylhydrazone ligands (L1 to L7) and the assessment of their antioxidant. Microwave assisted-synthesis of ligands with ZnCl2 in MeOH yielded tetrahedral Zn(II) complexes with a 1:2 metal: ligand ratio, characterized by HRMS, FTIR, and UV-Vis spectroscopy, thermal and electrochemical analyses, and DFT calculations. The (L3)2Zn complex exhibited the lowest thermal stability, and (L6)2Zn and (L7)2Zn were the most stable. XRD powder showed that all complexes have good crystallinity with crystalline dimensions ranging from 32 to 86 nm. Cyclic voltammetry of Zn(II) complexes indicated a reversible redox process for (L4)2Zn and an irreversible process for the remaining six complexes: (L1)2Zn to (L3)2Zn and (L5)2Zn to (L7)2Zn. Antioxidant activity of ligands and complexes was assessed by the DPPH method; the L7 ligand and corresponding (L7)2Zn complex exhibited good activity, IC50 = 65.30 μmol.l-1 and 78.70 μmol.l-1, respectively, when compared with standard ascorbic acid.

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mentioning

confidence: 52%

Microwave-assisted synthesis, spectral characterization and DFT studies of Zn(II) complexes based on N-acylhydrazone ligands: stability and antioxidant activity

Santos¹,

Henriques²,

Lopes³

et al. 2023

Mediterr.J.Chem.,

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“…6 (a-b) and data are presented in Table 6. The fluorochromes of compounds which stimuli the responsive broad emission band due to consequence effects of inhibition photo-induced electron transfer (PET), magnetic perturbation, redox activity, and static interaction of metal ion toward fluorochromes enhancing hyperchromic to bathochromic shift [31][32]. The hydrazone ligand (H2L), Mn(II) and Cr(III) complexes emitted the radiation in higher intensity (λem= > Cu(II) > Fe (III) complexes.…”

Section: Fluorescence Emission Spectramentioning

confidence: 99%

New aroyl heterocyclic (E)-N′-((2-hydroxynaphthalen-1-yl)methylene)-4-oxopiperidine-1-carbohydrazide and its metal complexes: synthesis, spectroscopic, thermal, DFT, molecular docking and antimicrobial studies

Dongare,

Aswar

2023

Res Chem Intermed

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In order to resist the growth of human pathogenic microorganisms, we have synthesized a new N-heterocyclic hydrazone ligand of (E)-N'-(2-hydroxynaphthalen-1-yl)methylene-4-oxopiperidine-1-carbohydrazide (H2L) from the condensation reaction of 4-oxo-1-carbopiperidone hydrazide and 2-hydroxy-1-naphthaldehyde. The ligand reacted with metal salt of (M(II/III).Cl2).nH2O formed the two types of complexes [M(III)C17H19N3O5Cl] and [M(II)C17H20N3O5Cl] adopted octahedral geometry; where M=Cr(III), Fe(III), Mn(II), Co(II), Ni(II), Cu(II) ion. The ligand was thoroughly characterized by elemental analysis, FT−IR, UV−Vis, NMR ( 1 H, 13 C), HR-mass spectroscopy. Furthermore, the structural properties of metal complexes have been established on the basis of elemental analysis, UV-vis spectra, molar conductivity, magnetic susceptibility, ESR, TG-DTA analysis. The ligand behaves dibasic, linkages via phenolic-O, azomethine-N, enolic-O atoms in metal (III) complexes and monobasic in metal(II) complexes. The decomposition pattern were ascertained by thermal analysis, and kinetics accountability from Coats-Redfern relation. The compounds were excited at λex = 380 nm and observed good emission intensity at λem = λ527-533 nm. The surface morphology of ligand was distinct from complex proven an imaging by SEM analysis. The molecular geometry optimization, and quantum chemical properties have been retrieved from DFT. ADMET score have been predicted as a drug-likeness prospect from admetSAR method. The molecular docking outcomes displayed the good binding score of ligand with Adenylate kinase, Peptide deformylase (bacterial enzyme) and DNA polymerase (fungal enzyme).The in vitro antimicrobial potency of ligand and its complexes were showed the promising activity against the bacterial colony (Escherichia coli, Salmonella typhi, Staphylococcus aureus, Bacillus substilis), and fungal colony (Candida albicans, Aspergillus niger).

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“…In recent years, the application of rare earth complexes has mainly focused on fluorescence, magnetism, gas separation and adsorption, catalysis and biomedicine . In particular, rare earth complexes with good luminescence properties have been widely used in fluorescent anti‐counterfeiting materials, printing inks, as fluorescent probes and in other fields . The 8‐hydroxyquinoline rare earth and transition metal complexes have excellent optical properties.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and luminescence properties of novel 8‐hydroxyquinoline derivatives and their Eu(III) complexes

Guo

Shu

et al. 2018

Luminescence

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Six novel 8-hydroxyquinoline derivatives were synthesized using 2-methyl-8-hydroxyquinoline and para-substituted phenol as the main starting materials, and were characterized by H nuclear magnetic resonance (NMR), mass spectrometry (MS), ultraviolet (UV) light analysis and infra-red (IR) light analysis. Their complexes with Eu(III) were also prepared and characterized by elemental analysis, molar conductivity, UV light analysis, IR light analysis, and thermogravimetric-differential thermal analysis (TG-DTA). The results showed that the ligand coordinated well with Eu(III) ions and had excellent thermal stability. The structure of the target complex was EuY (NO ) .2H O. The luminescence properties of the target complexes were investigated, the results indicated that all target complexes had favorable luminescence properties and that the introduction of an electron-donating group could enhance the luminescence intensity of the corresponding complexes, but the addition of an electron-withdrawing group had the opposite effect. Among all the target complexes, the methoxy-substituted complex (-OCH ) had the highest fluorescence intensity and the nitro-substituted complex (-NO ) had the weakest fluorescence intensity. The results showed that 8-hydroxyquinoline derivatives had good energy transfer efficiency for the Eu(III) ion. All the target complexes had a relatively high fluorescence quantum yield. The fluorescence quantum yield of the complex EuY (NO ) .2H O was highest among all target complexes and was up to 0.628. Because of excellent luminescence properties and thermal stabilities of the Eu(III) complexes, they could be used as promising candidate luminescent materials.

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Synthesis, characterization and properties of salicylhydrazide–salicylacylhydrazone derivatives and their terbium complexes

Cited by 6 publications

References 19 publications

Microwave-assisted synthesis, spectral characterization and DFT studies of Zn(II) complexes based on N-acylhydrazone ligands: stability and antioxidant activity

Microwave-assisted synthesis, spectral characterization and DFT studies of Zn(II) complexes based on N-acylhydrazone ligands: stability and antioxidant activity

New aroyl heterocyclic (E)-N′-((2-hydroxynaphthalen-1-yl)methylene)-4-oxopiperidine-1-carbohydrazide and its metal complexes: synthesis, spectroscopic, thermal, DFT, molecular docking and antimicrobial studies

Synthesis and luminescence properties of novel 8‐hydroxyquinoline derivatives and their Eu(III) complexes

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