A luminescent homochiral 3D metal-organic framework, [Cd(dtba)(bpp)](3n) () (H(2)dtba = 2,2'-dithiobisbenzoic acid, bpp = 1,3-bis(4-pyridyl)propane), with an unprecedented threefold interpenetrating uniform network (8(6)), constructed from [Cd(dtba)](n) single helices and [Cd(bpp)](n) double-stranded helices, has been synthesized via hydrothermal reaction.
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http://dx.doi.org/10.1039/b908792c | DOI Listing |
Inorg Chem
January 2025
Department of Chemistry, The University of Chicago, Chicago, Illinois 60637, United States.
Luminescent chiral metal-organic frameworks (CMOFs) are promising candidates for the enantioselective sensing of important chiral molecules. Herein, we report the synthesis and characterization of Zn and Cd CMOFs based on 1,1'-bi-2-naphthol (BINOL)-derived 3,3',6,6'-tetra(benzoic acids), H-OEt and H-OH. Four CMOFs, -OEt, -OH, -OEt, and -OH, based on these ligands were crystallographically characterized.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
December 2024
School of Chemistry and Chemical Engineering, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Dongchuan Road no. 800, Shanghai, 200240, China.
Circularly polarized luminescence (CPL) film attracted considerable attention in information storage and encryption, three-dimensional display, and chiral recognition. However, due to the limited molecular mobility within thin film, achieving a high asymmetry factor and non-contact modulation of CPL remain challenging. In this work, color-switchable homochiral CPL films with high luminescence asymmetry factor (g~0.
View Article and Find Full Text PDFACS Appl Bio Mater
January 2025
Department of Chemistry, Indian Institute of Technology, Kharagpur, West Bengal 721302, India.
Blue-emissive nitrogen-doped chiral carbon dots (d-NCD230 and l-NCD230) exhibiting antipodal chiroptical activity, synthesized from the thermal pyrolysis of citric acid and d/l-aspartic acid in 1:2 molar ratios, have been explored as chirality-based fluorescent turn-off/on probes for the detection of Hg and l-cysteine (l-Cys). Circular dichroism (CD) spectroscopy revealed that the chiroptical activity originates from a synergy among intrinsic chirality, chiral precursors on the NCD surface, and hybridization of lower energy levels within the embedded chiral chromophore. Quantitative analysis of optical asymmetry using the Kuhn asymmetry factor () at the CD signal of 312 nm showed a higher value for d-NCD230 (1.
View Article and Find Full Text PDFInorg Chem
December 2024
Department of Inorganic Chemistry, University of Granada and "Unidad de Excelencia en Química (UEQ)", Avda. Fuente Nueva s/n, Granada 18071, Spain.
The thermodynamically controlled self-assembly of bis-bidentate quaterpyridine ligand, L = 2,2':5',5″:2″,2‴-quaterpyridine, with Cr and subsequent oxidation to Cr yields the first photoluminescent tetrahedral [CrL] molecular cage. Single-crystal X-ray diffraction reveals the presence of two homochiral cages (ΛΛΛΛ and ΔΔΔΔ) in the unit cell that crystallize as a racemic mixture. Additionally, a PF anion is observed inside the cavity, in line with isostructural cages built with Ni or Fe.
View Article and Find Full Text PDFChemistry
November 2024
Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials Science, Heilongjiang University, 74 Xuefu Road, Harbin, 150080, China.
Hierarchical self-assembly driven by non-covalent interactions is a prevalent strategy employed by nature to construct sophisticated biomacromolecules, such as proteins. However, the construction of protein-like superstructures that rely on weaker dispersion forces-driven hierarchical assembly remains largely unexplored. Here, we report the first example of dispersion forces driving the high-order assembly of the lanthanide trinuclear circular helicate [HNEt₃]₃[Eu₃(L)₆] (ΔΔΔ-1) into a protein-like lanthanide octamer ((ΔΔΔ-1)₈-2).
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