In the title complex, [La(C₇H₄BrO₃)Cl₂(C₁₂H₈N₂)](n), the La(III) ion is eight-coordinated by two carboxyl-ate O atoms from two 5-bromo-salicylate ligands, two N atoms from a chelating 1,10-phenanthroline ligand and four bridging Cl atoms in a distorted square-anti-prismatic geometry. The La(III) ions are linked by bridging carboxyl-ate groups and chloride anions into a chain along [100]. An intra-molecular O-H⋯O hydrogen bond is formed in the 5-bromo-salicylate ligand. π-π inter-actions between the pyridine and benzene rings and between the benzene rings are observed [centroid-centroid distances = 3.794 (5) and 3.804 (4) Å].
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http://dx.doi.org/10.1107/S1600536812025500 | DOI Listing |
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January 2025
Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science, Jiangsu Normal, University Xuzhou, Jiangsu, 221116, P. R. China.
Fabricating visible-light-responsive metal-organic frameworks (MOFs) with high stability and effective catalytic functionality remains a long-term pursuit yet a great challenge. Herein, a strategy of increasing ligand and cluster connectivity is developed to construct highly stable fluorescein MOFs, La-CFL, presenting a new (4,8)-connected topological structure compared to Cd-FL constructed using 6-connected dinuclear clusters and 3-connected tritopic ligands. La(CFL) containers like Chinese "Ritual Wine Vessels (Jue)" resemble linear arrangements interconnected by the [La(COO)] clusters.
View Article and Find Full Text PDFACS Omega
January 2025
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 50/38 Akademgorodok, Krasnoyarsk 330036, Russia.
The magnetization and anisotropy of magnetic susceptibility of a 5CB nematic liquid crystal doped three extracts containing chlorophylls a and b and carotenoids in different weight percentage has been studied. The extracts have been dissolved in the liquid crystal matrix at a concentration of 2%. The magnetic susceptibility of the substances has been measured by the Faraday-Curie balance method.
View Article and Find Full Text PDFDalton Trans
January 2025
School of Energy Resources, China University of Geosciences (Beijing), Beijing 100083, P.R. China.
Graphdiyne (GDY), which is composed of benzene rings and acetylene linkage units, is a new allotrope of carbon material. In particular, the large triangular pores of GDY, with a diameter of 5.4 Å, theoretically predict a higher lithium embedding density than traditional graphite anodes, making it a promising candidate for energy storage materials in lithium-ion (Li-ion) batteries.
View Article and Find Full Text PDFOrg Lett
January 2025
Department of Chemistry, College of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, P. R. China.
Benzene-containing cucurbituril[2,4] and benzene-containing cucurbituril[3,6], the structures of cucurbit[]urils with some glycoluril units replaced by benzene rings, are constructed through condensation of specific benzene-containing motifs. These novel macrocycles inherit cucurbit[]urils' concave cavity and provide chemical modification potentiality and chromophores. Benzene-containing cucurbituril[2,4] shows a -symmetric macrocycle, while benzene-containing cucurbituril[3,6] exhibits a distinctive two-cavity structure (one big and one small) that resembles a gourd and could potentially accommodate two guests different in size simultaneously.
View Article and Find Full Text PDFJ Am Chem Soc
January 2025
Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States.
Stacking interactions are a recurring motif in supramolecular chemistry and biochemistry, where a persistent theme is a preference for parallel-displaced aromatic rings rather than face-to-face π-stacking. This is typically explained in terms of quadrupole-quadrupole interactions between the arene moieties but that interpretation is inconsistent with accurate calculations, which reveal that the quadrupolar picture is qualitatively wrong. At typical π-stacking distances, quadrupolar electrostatics may differ in sign from an exact calculation based on charge densities of the interacting arenes.
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