Ruthenium(II) hydrazone Schiff base complexes: Synthesis, spectral study and catalytic applications

Manikandan, R.; Viswanathamurthi, Periasamy; Muthukumar, M.

doi:10.1016/j.saa.2011.08.033

Cited by 32 publications

(13 citation statements)

References 47 publications

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“…The metal complexes of hydrazones including heterocyclic moieties containing nitrogen, oxygen and sulphur as a hetro atoms have been studied extensively in order to establish a probable relationship between the chemical structure and biological activity [1][2][3][4]. Among them, Schiff base hydrazones bearing nitrogen containing moiety have attracted considerable attention due to their impressive, chemical and physical properties [5][6][7][8], biological activities [9][10][11][12] and also their analytical applications [13].…”

Section: Introductionmentioning

confidence: 99%

Bivalent transition metal complexes of ONO donor hydrazone ligand: Synthesis, structural characterization and antimicrobial activity

Bhaskar

Salunkhe

Yaul

et al. 2015

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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Section: Introductionmentioning

confidence: 99%

Bivalent transition metal complexes of ONO donor hydrazone ligand: Synthesis, structural characterization and antimicrobial activity

Bhaskar

Salunkhe

Yaul

et al. 2015

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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“…The spectra of the free ligands have showed a signal at 11.6-11.8 ppm characteristics of phenolic -OH proton which have disappeared in their complexes, suggesting the coordination of deprotonated phenolic oxygen [37]. A singlet observed at 8.7-9.2 ppm in the spectra of the free ligands has been assigned to azomethine proton which has undergone a downfield shift around 9.8-9.1 ppm in the complexes indicating the coordination of azomethine nitrogen to ruthenium metal [37][38][39][40]. The complexes have shown their aromatic protons of the phenolic group and bipyridine ligands have exhibited their signal in the region 6.1-8.9 ppm The above observations made it clear that the ligands have coordinated to the ruthenium(II) ion.…”

Section: H and 13 C Nmr Spectra Analysismentioning

confidence: 99%

Synthesis and Computational Investigations of Ruthenium(II) Complexes Containing Hydrazine Schiff Base Ligands

Kamalesu

Swarnalatha²,

Subramanian³

2022

J. Appl. Sol. Chem. Model.

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Three new heteroleptic ruthenium(II) complexes containing hydrazine schiff base as ligands were synthesized and characterized by using elemental analysis, FT-IR, 1 H, 13 C NMR, and mass spectroscopic techniques. FT-IR study showed that the substituted phenylhydrazine ligands behave as a monoanionic bidentate O and N donors (L) coordinate to ruthenium via the deprotonated phenolic oxygen and the azomethine nitrogen. They possess excellent thermal stabilities, evident from the thermal decomposition temperatures. Absorption, emission and electrochemical measurements were carried out and the structures of the synthesized complex were optimized using density functional theory (DFT). The molecular geometry, the highest occupied molecular orbital (HOMO), the lowest unoccupied molecular orbital (LUMO) energies, Mulliken atomic charges and molecular electrostatic potential (MEP) of the molecules are determined using B3LYP method and standard 6-311++G (d, p) basis set.

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“…The various types of Schiff-bases which have come to be known as salens, [19,20] salophens, [21] hydrazones, [22][23][24][25][26] semicarbazones and thiosemicarbazones [27][28][29][30][31] have attracted much attention from researchers since these molecules can form many different derivatives having various application possibilities. [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31] Schiff-bases can be cyclic [32][33][34] and noncyclic. [34] Macrocyclic Schiff-bases [32][33][34] have found important applications in macrocyclic and supramolecular chemistry, and various heterocyclic Schiff-bases and their derivatives play crucial roles in medicinal chemistry.…”

Section: Introduction 1schiff-bases and Their Different Derivativesmentioning

confidence: 99%

“…Schiff‐bases can be formed either intra‐ or intermolecularly under diverse reaction conditions and in different solvents, [3–7] and have the general formula, R 1 R 2 C=N−R 3 , where R 1 , R 2 and R 3 may be an alkyl, aryl or any heteroaryl group (Figure 1). The reactions [1–13] involved in the preparation of a wide variety Schiff‐bases require mild reaction conditions and due to their ease of formation, Schiff‐bases [1–13] and their derivatives [14–31] . have been widely used in diverse applications.…”

Section: Introductionmentioning

confidence: 99%

Recent Progress in Metal‐Incorporated Acyclic Schiff‐Base Derivatives: Biological Aspects

et al. 2022

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Schiff-base derivatives are widely used organic compounds and their metal complexes have been drawing much attention to chemists due to interesting structural features and unique properties. The presence of nitrogen containing imine groups (À C=NÀ ) in Schiff-bases as well as in their metallic complexes and the chelating properties of these compounds are responsible for their many unique biological properties. In this review, we have summarized various acyclic Schiff-base ligands and their different metallic complexes which have been reported in the last one decade. Schiff-bases and their metal complexes have shown a broad range of biological activities, including antifungal, antibacterial, antimalarial, antiproliferative, antiinflammatory, antiviral, and antipyretic properties. We have reviewed and arranged the reported Schiff-base derivatives according to their diverse biological applications, especially their anti-bacterial and anti-fungal activities, anti-tumor and anti-cancer activities, anti-oxidant activities, anti-inflammatory activities and other therapeutic and medicinal properties. The other component of this work as a review of the molecular structures of various Schiff-bases since their molecular structures play a primary role in the biological properties. The presence of heteroatoms such as nitrogen, sulfur and oxygen with free electron pairs and aromatic rings in the structure of the Schiff-bases play significant roles in determining their properties.

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Ruthenium(II) hydrazone Schiff base complexes: Synthesis, spectral study and catalytic applications

Cited by 32 publications

References 47 publications

Bivalent transition metal complexes of ONO donor hydrazone ligand: Synthesis, structural characterization and antimicrobial activity

Bivalent transition metal complexes of ONO donor hydrazone ligand: Synthesis, structural characterization and antimicrobial activity

Synthesis and Computational Investigations of Ruthenium(II) Complexes Containing Hydrazine Schiff Base Ligands

Recent Progress in Metal‐Incorporated Acyclic Schiff‐Base Derivatives: Biological Aspects

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