Solvent-Free Synthesis and Characterization of the Zn(II) Complexes with Amino Acid Schiff Base

2012 ◽  
Vol 455-456 ◽  
pp. 740-745
Author(s):  
W. Zhong ◽  
Guo Qing Zhong ◽  
Y. Zhang ◽  
Q. Zhong
Keyword(s):  
Schiff Base ◽  
Amino Acid ◽  
Zinc Ion ◽  
Solvent Free ◽  
Schiff Base Ligands ◽  
Coordination Numbers ◽  
Percentage Mass Loss ◽  
One Step ◽  
The One ◽  
Amino Acid Schiff Base

Three zinc (II) complexes of the amino acid Schiff base were synthesized by the one step reaction of amino acid with aldehyde, zinc acetate in solvent-free. The compositions and structures of the complexes were characterized by elemental analyses, FTIR, XRD, TG-DSC. The compositions of the complexes are ZnL•nH2O (L = sal-leu, sal-ala, van-leu; sal = salicylaldehyde; van = vanillic aldehyde; leu = leucine; ala = alanine). Infrared spectra of the complexes indicate that the Schiff base ligands are formed, zinc ion is coordinated to the Schiff base ligands as terdentate with O, O and N donors from carboxylic, phenolic and imino groups respectively, the coordination numbers of zinc ion is four. The possible pyrolysis reactions in the thermal decomposition process of the complexes, the experimental and calculated percentage mass loss are also given.

scholarly journals Polydentate Schiff Base Ligands and Their La(III) Complexes: Synthesis, Characterization, Antibacterial, Thermal, and Electrochemical Properties

2012 ◽  
Vol 2012 ◽  
pp. 1-11 ◽  
Author(s):  
Ali E. Şabik ◽  
Muharrem Karabörk ◽  
Gökhan Ceyhan ◽  
Mehmet Tümer ◽  
Metin Dığrak
Keyword(s):  
Antimicrobial Activity ◽  
Schiff Base ◽  
Electrochemical Properties ◽  
Antimicrobial Activities ◽  
Nitrogen Atmosphere ◽  
Spectroscopic Methods ◽  
Schiff Base Ligands ◽  
One Step ◽  
The One ◽  
Reversible Transfer

We synthesized the Schiff base ligands H2L1–H2L4 and their La(III) complexes and characterized them by the analytical and spectroscopic methods. We investigated their electrochemical and antimicrobial activity properties. The electrochemical properties of the ligands H2L1–H2L4 and their La(III) complexes were studied at the different scan rates (100 and 200 mV), different pH ranges (), and in the different solvents. The electrooxidation of the Schiff base ligands involves a reversible transfer of two electrons and two protons in solutions of pH up to 5.5, in agreement with the one-step two-electron mechanism. In solutions of pH higher than 5.5, the process of electrooxidation reaction of the Schiff base ligands and their La(III) complexes follows an ECi mechanism. The antimicrobial activities of the ligands and their complexes were studied. The thermal properties of the metal complexes were studied under nitrogen atmosphere in the range of temperature 20–1000°C.

Weakly Non-Covalent Docking of Amino-Acid Schiff Base Zn(II) Complex to Lysozyme

2021 ◽  
Vol 888 ◽  
pp. 105-110
Author(s):  
Takashiro Akitsu ◽  
Yuto Kuroda ◽  
Shintaro Suda ◽  
Tetsundo Furuya ◽  
Tomoyuki Haraguchi ◽  
...  
Keyword(s):  
Schiff Base ◽  
Amino Acid ◽  
Synthesis Method ◽  
Low Molecular Weight ◽  
Egg White Lysozyme ◽  
Weight Protein ◽  
Covalent Docking ◽  
Low Molecular Weight Protein ◽  
Catalytic Reactivity ◽  
Amino Acid Schiff Base

Artificial metal enzymes that combine proteins with synthesized unnatural metal complexes as cofactors are attracting attention. The preparation of artificial metal enzymes not only clarifies the behavior of metal ions in biology, but also leads to the development of synthetic chemistry fields such as the discovery of new catalytic reactivity and substrate selectivity that are not observed in nature. In addition, a certain Schiff base zinc (II) complex is known to exhibit antioxidant and anticancer activity, too. Therefore, in this study, we investigated a rapid synthesis method of two known amino acid Schiff base zinc (II) complexes using microwave method and the complexation of zinc (II) complex with chicken egg white lysozyme, which is a relatively low molecular weight protein. Furthermore, investigation of weakly non-covalent intermolecular interaction features between the zinc (II) complexes and lysozyme was also carried out using some spectroscopic measurements.

ChemInform Abstract: Amino Acid Schiff Base Complexes of Dimethyldichlorosilane.

1985 ◽  
Vol 16 (47) ◽  
Author(s):  
T. M. AMINABHAVI ◽  
N. S. BIRADAR ◽  
S. B. PATIL ◽  
V. L. RODDABASANAGOUDAR ◽  
W. E. RUDZINSKI
Keyword(s):  
Schiff Base ◽  
Amino Acid ◽  
Schiff Base Complexes ◽  
Amino Acid Schiff Base
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