A novel 3D Co(II) coordination polymer, [Co6(4-ptz)6(N3)6]n (1) (4-ptz = 4-(pyridinyl)tetrazole), was synthesized by in situ hydrothermal reaction and characterized magnetically. Compound 1 consists of ferrimagnetic-like Co(II) layers with the title heterobridges and exhibits the spin-glass slow dynamics. The study on spin-glass behavior in mixed azide and tetrazolate bridged compounds is the first example.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1039/c4dt03332a | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Tuning the Duplex Stability of DNA Oligonucleotides Containing Metal-Mediated Base Pairs of Imidazole-Derived Nucleobases.
Chemistry
December 2024
University of Münster Department of Chemistry and Pharmacy: Westfalische Wilhelms-Universitat Munster Fachbereich 12 Chemie und Pharmazie, Institut für Anorganische und Analytische Chemie, Corrensstr. 28/30, 48149, Münster, GERMANY.
Two artificial imidazole-derived nucleobases, HQIm (3H-imidazo[4,5-f]quinolin-5-ol) and CaIm (imidazole-4-carboxylate), were introduced into short DNA duplexes to systematically investigate their thermal stability upon metal ion coordination. Metal-mediated base pairs are formed with the 3d metal ions CoII, NiII and ZnII, as well as with the lanthanoid ions EuIII and SmIII, which induce a thermal stabilization of up to 8 °C upon binding. The latter are the first lanthanoid-mediated base pairs involving only four donor atoms that result in a significant duplex stabilization.
View Article and Find Full Text PDFCrystal structure of -poly[[di-aqua-di-imida-zole-cobalt(II)]-μ-2,3,5,6-tetra-bromo-benzene-1,4-di-carboxyl-ato].
Acta Crystallogr E Crystallogr Commun
October 2024
Toyota Central R&D Labs., Inc., 41-1 Yokomichi, Nagakute, Aichi 480-1192, Japan.
The asymmetric unit of the title compound, [Co(CBrO)(CHN)(HO)] or [Co(Brbdc)(im)(HO)] , comprises half of Co ion, tetra-bromo-benzene-dicarboxylate (Brbdc), imidazole (im) and a water mol-ecule. The Co ion exhibits a six-coordinated octa-hedral geometry with two oxygen atoms of the Brbdc ligand, two oxygen atoms of the water mol-ecules, and two nitro-gen atoms of the im ligands. The carboxyl-ate group is nearly perpendicular to the benzene ring and shows monodentate coordination to the Co ion.
View Article and Find Full Text PDFZinc and RNA Binding Is Linked to the Conformational Flexibility of ZRANB2: A CCCC-Type Zinc Finger Protein.
Biochemistry
January 2025
Department of Pharmaceutical Sciences, School of Pharmacy, University of Maryland, Baltimore, Maryland 21201-1180, United States.
Ran-binding domain-containing protein 2 (ZRANB2) is a zinc finger (ZF) protein that plays a key role in alternative splicing. ZRANB2 is composed of two ZF domains that contain four invariant cysteine residues per domain. ZRANB2 binds RNA targets that contain AGGUAA sequence motifs.
View Article and Find Full Text PDFDirected coordination of C/N-termini of cyano group in metal hexacyanoferrates to efficient palladium recovery: Enhanced adsorption affinity and selectivity.
Environ Res
December 2024
Yanshan Earth Critical Zone and Surface Fluxes Research Station, College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China. Electronic address:
N-termini Cyano group (CN) in metal hexacyanoferrates (MHCF) have been identified as specific-affinity sites for palladium (Pd), but C-termini CN do not effectively serve as Pd adsorption sites due to their stronger bonds with the metal ligands (M), which reduces the activity and density of CN. Herein, the optimization of directional coordination of cyano group C/N-termini by modulating the electronic structure of the M (Fe, Co, and Ni) in MHCF was investigated to reinforce the Pd recovery. Spectroscopic analyses and DFT calculations revealed that NiHCF exhibited N-site mono-coordination, whereas CoHCF displayed C-site mono-coordination due to spin-exchange interactions, leading to the strengthened N-Co bonds and weakened Fe-C bonds.
View Article and Find Full Text PDFPreparation and properties of a novel alginate/carrageenan crosslinked coordination polymer and evaluation of the antibacterial, antioxidant and anticancer potential of its Co(ii), and Cr(iii) polymeric complexes.
RSC Adv
December 2024
Laboratory of Interfaces and Advanced Materials, Faculty of Sciences of Monastir, University of Monastir Monastir 5000 Tunisia.
Natural polysaccharides play a crucial role across diverse fields such as medicine, food, and cosmetics, for their various physiochemical and biological properties. In this study, we developed a new crosslinked biopolymer using sodium alginate (AG) and carrageenan (CAR) polysaccharides. Various metal complexes involving different metal salts such as CoCl·6HO and CrCl·6HO were synthesized using the crosslinked biopolymer formed above.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!