New sandwich-type lanthanide complexes based on closed-macrocyclic Schiff base and phthalocyanine molecules

2016 ◽  
Vol 45 (17) ◽  
pp. 7476-7482 ◽  
Author(s):  
Feng Gao ◽  
Xiaowan Feng ◽  
Liu Yang ◽  
Xiaoyu Chen
Keyword(s):  
Schiff Base ◽  
Lanthanide Complexes ◽  
Magnetic Studies ◽  
Sandwich Type ◽  
Dysprosium Complex ◽  
Macrocyclic Schiff Base

Two new sandwich-type lanthanide complexes simultaneously containing closed-macrocyclic Schiff base and phthalocyanine molecules were synthesized and structurally characterized. The magnetic studies reveal the corresponding dysprosium complex behaves as a typical SMM.

Syntheses, structures and magnetic properties of macrocyclic Schiff base-supported homodinuclear lanthanide complexes

2018 ◽  
Vol 47 (33) ◽  
pp. 11696-11704 ◽  
Author(s):  
Feng Gao ◽  
Yi-Quan Zhang ◽  
Wang Sun ◽  
Huan Liu ◽  
Xiaoyu Chen
Keyword(s):  
Magnetic Properties ◽  
Schiff Base ◽  
Theoretical Analysis ◽  
Lanthanide Complexes ◽  
Magnetic Measurements ◽  
Dysprosium Complex ◽  
Macrocyclic Schiff Base

Five macrocyclic Schiff base-supported homodinuclear lanthanide complexes were successfully designed and synthesized by template strategy. Theoretical analysis and magnetic measurements reveal dysprosium complex 1 behaves as a typical SMM with intramolecular ferromagnetic Dy3+⋯Dy3+ interaction.

Synthesis, characterization and magnetic studies of dinuclear lanthanide complexes constructed with a Schiff base ligand

2020 ◽  
Vol 73 (6) ◽  
pp. 1045-1054 ◽  
Author(s):  
Amin Khan ◽  
Olaf Fuhr ◽  
Muhammad Nadeem Akhtar ◽  
Yanhua Lan ◽  
Madhu Thomas ◽  
...  
Keyword(s):  
Schiff Base ◽  
Schiff Base Ligand ◽  
Lanthanide Complexes ◽  
Magnetic Studies

Syntheses, structures, and magnetic properties of homodinuclear lanthanide complexes based on dinucleating Schiff base ligands

2015 ◽  
Vol 44 (46) ◽  
pp. 20232-20241 ◽  
Author(s):  
Feng Gao ◽  
Feng-Lei Yang ◽  
Guang-Zhou Zhu ◽  
Yue Zhao
Keyword(s):  
Magnetic Properties ◽  
Schiff Base ◽  
Lanthanide Complexes ◽  
Antiferromagnetic Coupling ◽  
Magnetic Studies ◽  
Schiff Base Ligands

Two series of homodinuclear lanthanide(iii) complexes were synthesized and characterized. Magnetic studies reveal the weakly antiferromagnetic coupling between paramagnetic Ln ions and enhanced relaxation of magnetization for Dy2 complexes.

scholarly journals In Vitro Evaluation of the Potential Pharmacological Activity and Molecular Targets of New Benzimidazole-Based Schiff Base Metal Complexes

Antibiotics ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 728
Author(s):  
Alberto Aragón-Muriel ◽  
Yamil Liscano ◽  
Yulieth Upegui ◽  
Sara M. Robledo ◽  
María Teresa Ramírez-Apan ◽  
...  
Keyword(s):  
Schiff Base ◽  
Molecular Docking ◽  
Lanthanide Complexes ◽  
Human Tumor ◽  
Model Membranes ◽  
Leishmania Braziliensis ◽  
Cytotoxic Activities ◽  
Schiff Base Ligands ◽  
Major Interest

Metal-based drugs, including lanthanide complexes, have been extremely effective in clinical treatments against various diseases and have raised major interest in recent decades. Hence, in this work, a series of lanthanum (III) and cerium (III) complexes, including Schiff base ligands derived from (1H-benzimidazol-2-yl)aniline, salicylaldehyde, and 2,4-dihydroxybenzaldehyde were synthesized and characterized using different spectroscopic methods. Besides their cytotoxic activities, they were examined in human U-937 cells, primate kidney non-cancerous COS-7, and six other, different human tumor cell lines: U251, PC-3, K562, HCT-15, MCF-7, and SK-LU-1. In addition, the synthesized compounds were screened for in vitro antiparasitic activity against Leishmania braziliensis, Plasmodium falciparum, and Trypanosoma cruzi. Additionally, antibacterial activities were examined against two Gram-positive strains (S. aureus ATCC® 25923, L. monocytogenes ATCC® 19115) and two Gram-negative strains (E. coli ATCC® 25922, P. aeruginosa ATCC® 27583) using the microdilution method. The lanthanide complexes generally exhibited increased biological activity compared with the free Schiff base ligands. Interactions between the tested compounds and model membranes were examined using differential scanning calorimetry (DSC), and interactions with calf thymus DNA (CT-DNA) were investigated by ultraviolet (UV) absorption. Molecular docking studies were performed using leishmanin (1LML), cruzain (4PI3), P. falciparum alpha-tubulin (GenBank sequence CAA34101 [453 aa]), and S.aureus penicillin-binding protein 2a (PBP2A; 5M18) as the protein receptors. The results lead to the conclusion that the synthesized compounds exhibited a notable effect on model membranes imitating mammalian and bacterial membranes and rolled along DNA strands through groove interactions. Interactions between the compounds and studied receptors depended primarily on ligand structures in the molecular docking study.

scholarly journals End-on cyanate or end-to-end thiocyanate bridged dinuclear copper(ii) complexes with a tridentate Schiff base blocking ligand: synthesis, structure and magnetic studies

2018 ◽  
Vol 42 (3) ◽  
pp. 1634-1641 ◽  
Author(s):  
Samim Khan ◽  
Stephen Sproules ◽  
Louise S. Natrajan ◽  
Klaus Harms ◽  
Shouvik Chattopadhyay
Keyword(s):  
Schiff Base ◽  
Magnetic Studies ◽  
Dinuclear Copper ◽  
End To End ◽  
Ligand Synthesis ◽  
Tridentate Schiff Base

Two new dinuclear Schiff base copper(ii) complexes have been synthesized and characterized. Copper(ii) centres are ferromagnetically coupled in1and antiferromagnetically coupled in2.

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