Chiral self-sorting during the formation of cage-like molecules continues to fascinate and advance our understanding of the phenomenon in general. Herein, we report the chiral self-sorting in the Pd L -type metal-organic cages. When a racemic mixture of axially chiral bis-pyridyl ligands undergo coordination-driven self-assembly with Pd(II) ions to form Pd L -type cages, the system has the option of chiral self-sorting to afford any of at least 70 pairs of (one homochiral and 69 heterochiral) enantiomers and 5 meso isomers or a statistical mixture of everything. However, the system resulted in diastereoselective self-assembly through a high-fidelity chiral social self-sorting to form a racemic mixture of D symmetric heterochiral [Pd (L ) ] /[Pd (L ) ] cages.
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http://dx.doi.org/10.1002/asia.202201312 | DOI Listing |
Angew Chem Int Ed Engl
December 2024
Institute of Molecular Functional Materials, State Key Laboratory of Synthetic Chemistry, and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, 999077, P. R. China.
ChemistryOpen
November 2024
School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram (IISER-TVM), 695551, Thiruvananthapuram, India.
Several BINOL-derived C2-symmetric aldehydes were synthesized to investigate chiral self-sorting phenomena during macrocycle formation in the presence of aliphatic and aromatic bisamines. While self-sorting was unsuccessful with aliphatic amines, aromatic amine dictated complete homochiral self-sorting, confirmed by H NMR analysis and molecular modelling. Additionally, the impact of macrocyclization on the chiroptical properties of these macrocycles was examined.
View Article and Find Full Text PDFJ Am Chem Soc
November 2024
Department of Chemistry and Chemical Biology, TU Dortmund University, Otto Hahn Str. 6, 44227 Dortmund, Germany.
A family of Pd cages prepared from ligands based on an axially chiral diamino-[1,1'-biazulene] motif (serving as a unique azulene-based surrogate of the ubiquitous BINOL moiety) is reported. We show that preparing a cage starting from the racemate of a shorter bis-monodentate ligand derivative, equipped with pyridine donor groups, leads to integrative ("social") chiral self-sorting, exclusively yielding the product, but only in a selection of solvents. This phenomenon is driven by individual solvent molecules acting as hydrogen bonding tethers between the amino groups of neighboring ligands, thereby locking the final coordination cage in a single isomeric form.
View Article and Find Full Text PDFChirality
October 2024
Institut de Physique et Chimie des Matériaux de Stasbourg (IPCMS), Université de Strasbourg - CNRS UMR 7504, Strasbourg Cedex, France.
Nat Commun
September 2024
State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, 130012, Changchun, China.
During the construction of supramolecular polymers of smaller nanoparticles/nanoclusters bearing hierarchy and homochirality, the mechanism understanding via intuitive visualization and precise cross-scale chirality modulation is still challenging. For this goal, a cooperative self-assembly strategy is here proposed by using ionic complexes with uniform chemical composition comprising polyanionic nanocluster cores and surrounded chiral cationic organic components as monomers for supramolecular polymerization. The single helical polymer chains bearing a core-shell structure at utmost length over 20 μm are demonstrated showing comparable flexibility resembling covalent polymers.
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