Variable coordination of carbazolyl-bis(tetrazole) ligands in lanthanide chemistry

2018 ◽  
Vol 47 (43) ◽  
pp. 15487-15496 ◽  
Author(s):  
Leah Gajecki ◽  
David J. Berg ◽  
Josh Hoenisch ◽  
Allen G. Oliver
Keyword(s):  
Lanthanide Complexes ◽  
Lanthanide Chemistry ◽  
Variable Coordination

Lanthanide complexes of 1,8-bis(2′-isopropyltetrazo-5′-yl)-3,6-di-tert-butylcarbazolide adopt geometries that include planar, buckled and tetrazolyl-bridged tridentate, as well as bidentate, bonding modes.

Lanthanide Complexes in FRET Applications

2011 ◽  
Vol 1 (1) ◽  
pp. 17-35
Author(s):  
Daniel Geibler ◽  
Hildebrandt Niko
Keyword(s):  
Lanthanide Complexes

Regulating Spin Dynamics of Nitronyl Nitroxide Biradical Lanthanide Complexes through Introducing Different Transition Metals

2021 ◽  
Vol 16 (7) ◽  
pp. 793-800
Author(s):  
Pei Jing ◽  
Lu Xi ◽  
Jiao Lu ◽  
Jing Han ◽  
Xiaohui Huang ◽  
...  
Keyword(s):  
Transition Metals ◽  
Lanthanide Complexes ◽  
Spin Dynamics ◽  
Nitronyl Nitroxide

Photocytotoxicity of Thiophene- and Bithiophene-Dipicolinato Luminescent Lanthanide Complexes

2021 ◽  
Author(s):  
Carime V. Rodrigues ◽  
Katherine R. Johnson ◽  
Vincent C. Lombardi ◽  
Marcelo O. Rodrigues ◽  
Josiane A. Sobrinho ◽  
...  
Keyword(s):  
Lanthanide 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.

Highly NIR-emitting ytterbium complexes containing 2-(tosylaminobenzylidene)-N-benzoylhydrazone anions: structure in solution and use for bioimaging

2021 ◽  
Author(s):  
Anton D Kovalenko ◽  
Alexander A. Pavlov ◽  
Ilya D. Ustinovich ◽  
Alena S. Kalyakina ◽  
Alexander S Goloveshkin ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Lanthanide Complexes ◽  
2D Nmr ◽  
2D Nmr Spectroscopy ◽  
Ytterbium Complexes ◽  
Solution Behaviour ◽  
Structure In Solution

Abstract: Solution behaviour in DMSO using 1D and 2D NMR spectroscopy was performed for lanthanide complexes Ln(L)(HL) and Ln(HL)2Cl, containing non-macrocyclic 2-(tosylamino)-benzylidene-N-benzoylhydrazone (H2L), and the structure of [Yb(L)]+ cation in...

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