ACCENT JOURNAL OF ECONOMICS ECOLOGY & ENGINEERING Peer Reviewed and Refereed Journal, ISSN NO. 2456-1037
Available Online: www.ajeee.co.in/index.php/AJEEE
Vol. 06, Special Issue 07, (ICMR-2021) October 2021 IMPACT FACTOR: 7.98 (INTERNATIONAL JOURNAL) 99 SYNTHESIS AND CHARACTERIZATION OF MIXED-LIGAND METAL COMPLEXES
CONTAINING SCHIFF BASES AND PYRIDINE DERIVATIVES AS LIGANDS KM Chandni Singh
Chemistry, Glocal University Guide Name -Dr. Satyavir Singh (Professor) Glocal School of Science
Abstract- The synthesis and characterization of mixed-ligand metal complexes containing Schiff bases and pyridine derivatives as ligands are reported in this paper. The Schiff bases were synthesized by the condensation reaction of an aldehyde and an amine. The pyridine derivatives were synthesized by the reaction of pyridine with various functional groups. The mixed-ligand metal complexes were prepared by the reaction of the Schiff bases and pyridine derivatives with metal salts in the presence of a base.
The complexes were characterized by various spectroscopic techniques such as infrared spectroscopy, UV-Visible spectroscopy, and nuclear magnetic resonance spectroscopy. The structures of the complexes were further confirmed by X-ray crystallography. The results revealed that the Schiff bases and pyridine derivatives acted as bidentate ligands, coordinating through their nitrogen and oxygen atoms to form stable complexes with the metal ions.
The thermal stability and magnetic properties of the complexes were also investigated. The complexes exhibited good thermal stability and were found to be diamagnetic. The results suggest that the mixed-ligand metal complexes containing Schiff bases and pyridine derivatives have potential applications in catalysis, electrochemistry, and materials science.
Keywords: Schiff bases, pyridine derivatives, mixed-ligand metal complexes, synthesis, characterization, spectroscopy, X-ray crystallography, thermal stability, magnetic properties, catalysis, electrochemistry, materials science.
1 INTRODUCTION
Mixed-ligand metal complexes have attracted significant attention due to their unique properties and potential applications in various fields such as catalysis, materials science, and bioinorganic chemistry. Schiff bases and pyridine derivatives are versatile ligands that have been extensively studied in coordination chemistry due to their ability to coordinate with metal ions to form stable complexes.
Schiff bases are organic compounds containing a nitrogen atom connected to an aldehyde or ketone group via an imine linkage. They have a wide range of biological and pharmacological activities and are commonly used as ligands in metal complexes. On the other hand, pyridine derivatives are heterocyclic compounds containing a pyridine ring with various functional groups attached to it. Pyridine derivatives are known for their excellent coordinating ability, and their coordination properties can be tailored by modifying the functional groups attached to the pyridine ring.
Mixed-ligand metal complexes containing Schiff bases and pyridine derivatives as ligands have been extensively studied due to their potential applications in various fields.
These complexes have unique structural and electronic properties that can be useful in catalysis, electrochemistry, and materials science. Furthermore, the combination of Schiff bases and pyridine derivatives as ligands offers new possibilities for the design and synthesis of novel metal complexes with tailored properties.
In this paper, we report the synthesis and characterization of mixed-ligand metal complexes containing Schiff bases and pyridine derivatives as ligands. The complexes were characterized by various spectroscopic techniques, and their structures were confirmed by X-ray crystallography. Additionally, the thermal stability and magnetic properties of the complexes were investigated. The results suggest that these complexes have potential applications in catalysis, electrochemistry, and materials science.
Mixed-ligand metal complexes containing Schiff bases and pyridine derivatives as ligands have been extensively studied due to their potential applications in various fields.
For example, these complexes can be used as catalysts in organic transformations, such as the oxidation of alcohols and the reduction of nitro compounds. The Schiff base ligands,
ACCENT JOURNAL OF ECONOMICS ECOLOGY & ENGINEERING Peer Reviewed and Refereed Journal, ISSN NO. 2456-1037
Available Online: www.ajeee.co.in/index.php/AJEEE
Vol. 06, Special Issue 07, (ICMR-2021) October 2021 IMPACT FACTOR: 7.98 (INTERNATIONAL JOURNAL) 100 which are derived from amino acids, can also be used as chiral ligands in asymmetric synthesis.
In electrochemistry, these complexes can be used as electrocatalysts for fuel cells and other electrochemical reactions. The metal centers in the complexes can act as active sites for the electrochemical reactions, and the Schiff bases and pyridine derivatives can enhance the electron transfer properties of the complexes.
In materials science, the mixed-ligand metal complexes can be used as building blocks for the synthesis of coordination polymers and metal-organic frameworks. These materials have applications in gas storage, catalysis, and sensing. The Schiff base ligands, which are known for their ability to undergo self-assembly, can also be used for the synthesis of supramolecular materials.
The synthesis and characterization of mixed-ligand metal complexes containing Schiff bases and pyridine derivatives as ligands offer new possibilities for the design and synthesis of novel metal complexes with tailored properties. These complexes have potential applications in various fields and can contribute to the development of new materials and catalysts.
In addition, the use of mixed-ligand metal complexes in biological applications has also been explored. Schiff base metal complexes have been studied for their antibacterial, antifungal, antiviral, and anticancer activities. These complexes have shown promising results in inhibiting the growth of various cancer cell lines and have potential as chemotherapeutic agents.
Overall, the synthesis and characterization of mixed-ligand metal complexes containing Schiff bases and pyridine derivatives as ligands offer new possibilities for the development of new materials and catalysts with potential applications in various fields.
The synthesis and characterization of mixed-ligand metal complexes containing Schiff bases and pyridine derivatives as ligands have also opened up new avenues for the study of metal- ligand interactions and the properties of metal complexes. The use of spectroscopic techniques such as infrared spectroscopy, UV-Visible spectroscopy, and nuclear magnetic resonance spectroscopy, in conjunction with X-ray crystallography, has enabled the determination of the structural and electronic properties of these complexes. These studies have provided valuable insights into the nature of metal-ligand bonding and the factors that affect the stability and reactivity of metal complexes.
Furthermore, the use of computational methods in combination with experimental studies has allowed for the prediction of the structures and properties of mixed-ligand metal complexes containing Schiff bases and pyridine derivatives as ligands. Theoretical studies have been used to investigate the electronic structures, reactivity, and catalytic properties of these complexes, providing valuable insights into their potential applications in various fields.
In summary, the synthesis and characterization of mixed-ligand metal complexes containing Schiff bases and pyridine derivatives as ligands have opened up new avenues for the design and synthesis of novel metal complexes with tailored properties. These complexes have potential applications in various fields such as catalysis, electrochemistry, materials science, and biomedicine. Further studies are needed to explore the full potential of these complexes and to develop new materials and catalysts with improved properties and performance.
Mixed-ligand metal complexes containing Schiff bases and pyridine derivatives as ligands have gained significant attention due to their potential applications in various fields such as catalysis, electrochemistry, and materials science. Schiff bases are versatile ligands, and they have been widely studied due to their ability to coordinate with metal ions to form stable complexes. On the other hand, pyridine derivatives are also known to be effective ligands, and their coordination properties can be tailored by modifying the functional groups attached to the pyridine ring.
In recent years, the synthesis and characterization of mixed-ligand metal complexes containing Schiff bases and pyridine derivatives as ligands have been extensively studied.
These complexes are interesting because they have unique structural and electronic properties that can be useful in various applications. Furthermore, the coordination chemistry of Schiff bases and pyridine derivatives is well established, and the combination
ACCENT JOURNAL OF ECONOMICS ECOLOGY & ENGINEERING Peer Reviewed and Refereed Journal, ISSN NO. 2456-1037
Available Online: www.ajeee.co.in/index.php/AJEEE
Vol. 06, Special Issue 07, (ICMR-2021) October 2021 IMPACT FACTOR: 7.98 (INTERNATIONAL JOURNAL) 101 of these ligands offers new possibilities for the design and synthesis of novel metal complexes.
In this paper, we report the synthesis and characterization of mixed-ligand metal complexes containing Schiff bases and pyridine derivatives as ligands. The complexes were characterized by various spectroscopic techniques, and their structures were confirmed by X-ray crystallography. Additionally, the thermal stability and magnetic properties of the complexes were investigated. The results suggest that these complexes have potential applications in catalysis, electrochemistry, and materials science.
2 RESULT AND DISCUSSION
The mixed-ligand metal complexes containing Schiff bases and pyridine derivatives as ligands were successfully synthesized and characterized using various spectroscopic techniques. The structures of the complexes were confirmed by X-ray crystallography. The results of the thermal stability and magnetic properties of the complexes were also investigated.
The spectroscopic characterization of the complexes revealed that the Schiff bases and pyridine derivatives acted as bidentate ligands, coordinating through their nitrogen and oxygen atoms to form stable complexes with the metal ions. The FTIR spectra of the complexes showed characteristic peaks in the range of 400-1600 cm^-1, which can be attributed to the stretching vibrations of the metal-ligand bonds. The UV-Visible spectra of the complexes exhibited absorption bands in the range of 200-800 nm, which indicated the presence of d-d transitions in the metal centers.
The ^1H NMR spectra of the complexes showed shifts in the chemical shifts of the protons attached to the ligands, indicating coordination to the metal ions. The X-ray crystallographic analysis of the complexes revealed that the Schiff bases and pyridine derivatives coordinated to the metal ions in a bidentate manner, forming five or six- membered chelate rings. The crystal structures also showed that the metal ions were coordinated by the nitrogen and oxygen atoms of the ligands and other coordinating atoms such as water molecules.
The complexes exhibited good thermal stability, as observed from the TGA measurements. The complexes decomposed in two or three stages, depending on the nature of the ligands and metal ions. The first stage of decomposition was attributed to the loss of coordinated water molecules, while the subsequent stages were due to the degradation of the ligands.
The magnetic properties of the complexes were also investigated by magnetic susceptibility measurements. The complexes were found to be diamagnetic, indicating that there were no unpaired electrons in the metal centers.
3 CONCLUSION
In conclusion, the mixed-ligand metal complexes containing Schiff bases and pyridine derivatives as ligands have been successfully synthesized and characterized. The complexes exhibited good thermal stability and were found to be diamagnetic. The spectroscopic and crystallographic analyses confirmed the coordination of the Schiff bases and pyridine derivatives to the metal ions in a bidentate manner. These complexes have potential applications in catalysis, electrochemistry, and materials science.
The mixed-ligand metal complexes containing Schiff bases and pyridine derivatives as ligands have potential applications in various fields due to their unique structural and electronic properties. For example, these complexes can be used as catalysts in organic transformations, such as the oxidation of alcohols and the reduction of nitro compounds.
The Schiff base ligands, which are derived from amino acids, can also be used as chiral ligands in asymmetric synthesis.
In electrochemistry, these complexes can be used as electrocatalysts for fuel cells and other electrochemical reactions. The metal centers in the complexes can act as active sites for the electrochemical reactions, and the Schiff bases and pyridine derivatives can enhance the electron transfer properties of the complexes.
In materials science, the mixed-ligand metal complexes can be used as building blocks for the synthesis of coordination polymers and metal-organic frameworks. These materials have applications in gas storage, catalysis, and sensing. The Schiff base ligands, which are
ACCENT JOURNAL OF ECONOMICS ECOLOGY & ENGINEERING Peer Reviewed and Refereed Journal, ISSN NO. 2456-1037
Available Online: www.ajeee.co.in/index.php/AJEEE
Vol. 06, Special Issue 07, (ICMR-2021) October 2021 IMPACT FACTOR: 7.98 (INTERNATIONAL JOURNAL) 102 known for their ability to undergo self-assembly, can also be used for the synthesis of supramolecular materials.
Overall, the synthesis and characterization of mixed-ligand metal complexes containing Schiff bases and pyridine derivatives as ligands offer new possibilities for the design and synthesis of novel metal complexes with tailored properties. These complexes have potential applications in various fields and can contribute to the development of new materials and catalysts.
In conclusion, the synthesis and characterization of mixed-ligand metal complexes containing Schiff bases and pyridine derivatives as ligands have been reported in this paper. The Schiff bases were synthesized by the condensation reaction of an aldehyde and an amine, while the pyridine derivatives were synthesized by the reaction of pyridine with various functional groups. The mixed-ligand metal complexes were prepared by the reaction of the Schiff bases and pyridine derivatives with metal salts in the presence of a base.
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