Intricate Low-Symmetry Ag6L4 Capsules Formed by Anion-Templated Self-Assembly of the Stereoisomers of an Unsymmetric Ligand DOI
Shohei Tashiro,

Yoshihiko Yamada,

Lea Antonia Kringe

et al.

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 1, 2024

Metal-organic cages and capsules exhibit space-specific functions based on their discrete hollow structures. To acquire enzyme-like asymmetric or intricate structures, they have been modified by desymmetrization with two more different ligands. There is a need to establish new strategies that can desymmetrize structures in simple way using only one type of ligand, which from the mixed-ligand approach. In this study, strategy was developed form interconvertible stereoisomers unsymmetric macrocyclic ligand benzimidazole[3]arene. Single-crystal X-ray diffraction analysis revealed isomers assembled silver tetrafluoroborate afforded conformationally heteroleptic Ag

Language: Английский

Thio-modified trianglimines, a novel group of chiral macrocyclic compounds of high structural dynamics DOI Creative Commons
Natalia Prusinowska, Agnieszka Czapik, Joanna Szymkowiak

et al.

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: Jan. 6, 2025

Abstract The embellishing of the macrocycle core with sulfur substituents varied sterical requirements changes structural dynamics chiral, triangular polyimines. Despite their formal high symmetry, these compounds adopt diverse conformations, in which represents a non-changeable unit. DFT calculations reveal that mutual arrangement sulfur-containing is controlled mainly by interactions. presence atoms affects chiroptical properties and causes red shift respective absorption bands compared to basic trianglimine. Unexpectedly, aromatic fragments attached atom have less impact on ECD spectra, visible only particular spectral regions. Such possibility adapt various conformations also seen crystalline phase; however, stiff unit – caused macrocycles’ self-assembly into columnar-like aggregates. In crystal lattice, around having bulky SCPh 3 groups, space filled solvent formed; macrocycle’s internal cavity closed unavailable for guest molecules. Titration solutions SBn-substituted imine amine macrocycles AgOTf results significant confirming possible binding interactions between metal cations.

Language: Английский

Citations

0
Paramagnetic Cage-Type Co(II) Complexes of Chiral Macrocycles: Enantio- and Size-Selective Binding of Guest Molecules DOI Creative Commons
Jan Janczak, Jerzy Lisowski

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 23, 2025

Two enantiomers of the cage-type complex, [Co3LR2] and [Co3LS2] a large hexaazatriphenolic [3 + 3] macrocyclic imine L, have been synthesized characterized on basis NMR, CD, ESI MS spectra. The X-ray crystal structures [Co3L2] crystalline forms reveal two macrocycles cone shape stitched together by three Co(II) ions, forming barrel-shaped molecule with central void. Because limited size cavity enantiopure nature these enantiomeric complexes, both size-selective enantioselective binding guest molecules are observed. In case chiral guests, interaction paramagnetic centers leads to an effective NMR enantiodifferentiation signals molecules, even at host:guest ratios as low 1:200. tight prochiral such ethanol isopropanol within results in splitting enantiotopic methylene methyl signals. dc magnetic data for accord presence high-spin ac susceptibility this complex indicate field-induced single magnet (SMM) behavior. contrast reaction Co(II), ligand H3L Ni(II) or Cu(II) salts contraction macrocycle formation complexes smaller [2 2] macrocycle.

Language: Английский

Citations

0
Internal and External Pockets in Pillar[n]arene Sheets and Their Host–Guest Binding Beyond Cavity Volume Limitations DOI
Tan‐Hao Shi, De‐Hui Tuo,

Shogo Azuma

et al.

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 28, 2025

Constructing binding pockets by hierarchically assembling tailored building blocks and understanding structure-property relationships are challenging goals. Herein, amphiphilic pillar[5]arene pillar[6]arene were prepared used to construct 2D sheets, which consisted of well-defined hydrophobic hydrophilic interlayers. In the interlayers, internal created packing pairs pillar[n]arenes, external simultaneously generated from gaps between pillar[n]arenes due electrostatic attractions. Aromatic hydrocarbons accommodated in these ball milling. Due pockets, bulky guests larger than pillar[n]arene cavity sizes also captured sheets.

Language: Английский

Citations

0
A water-soluble cationic [2]biphenyl-extended pillar[6]arene: synthesis, host-guest interaction with hemin and application in chemodynamic/photodynamic cancer therapy DOI

Yan Cai,

Yue Zhang, Xufeng Liang

et al.

Chemical Communications, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

A water-soluble cationic [2]biphenyl-extended pillar[6]arene (CBpExP 6 ) was synthesized, forming a stable 1 : complex with hemin to enhance its stability for cancer CDT/PDT applications.

Language: Английский

Citations

0
Preparation of a homochiral metal-organic cage and its bonded silicas for efficient enantioseparation in high-performance liquid chromatography and gas chromatography DOI
Jun‐Hui Zhang,

Ruixue Liang,

Bin Huang

et al.

Chinese Chemical Letters, Journal Year: 2025, Volume and Issue: unknown, P. 111146 - 111146

Published: March 1, 2025

Language: Английский

Citations

0
A homochiral metal-organic polyhedron CMOP-IL for capillary gas chromatographic separation DOI
Hao Wang,

Yulan Zhu,

Taiping Xiong

et al.

Talanta, Journal Year: 2025, Volume and Issue: 295, P. 128354 - 128354

Published: May 19, 2025

Language: Английский

Citations

0
Charge-transfer host–guest complexes based on pillar[n]arenes and quinonoid compounds for near-infrared photothermal conversion DOI

Aopu Wang,

Xueru Zhao,

Han Zhang

et al.

Chemical Communications, Journal Year: 2024, Volume and Issue: 60(93), P. 13722 - 13725

Published: Jan. 1, 2024

The host–guest complexation between perethylated pillar[ n ]arenes and quinonoid compounds are investigated. resulting cocrystals demonstrate remarkable near-infrared photothermal conversion properties.

Language: Английский

Citations

1
Double-Bridging Increases the Stability of Zinc(II) Metal–Organic Cages DOI Creative Commons

Hannah Kurz,

Paula C. P. Teeuwen, Tanya K. Ronson

et al.

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(45), P. 30958 - 30965

Published: Nov. 4, 2024

A key feature of coordination cages is the dynamic nature their coordinative bonds, which facilitates synthesis complex polyhedral structures and post-assembly modification. However, this can limit cage stability. Increasing robustness important for real-world use cases. Here we introduce a double-bridging strategy to increase stability, where designed pairs bifunctional subcomponents combine generate rectangular tetratopic ligands within pseudo-cubic Zn8L6 cages. These withstand transmetalation, addition competing ligands, nucleophilic imines, under conditions single-bridged congeners decompose. Our approach not only increases stability while maintaining structure, but also enables incorporation additional functional units in proximity cavity. The larger cages, are inaccessible as congeners.

Language: Английский

Citations

1
Intricate Low-Symmetry Ag6L4 Capsules Formed by Anion-Templated Self-Assembly of the Stereoisomers of an Unsymmetric Ligand DOI
Shohei Tashiro,

Yoshihiko Yamada,

Lea Antonia Kringe

et al.

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 1, 2024

Metal-organic cages and capsules exhibit space-specific functions based on their discrete hollow structures. To acquire enzyme-like asymmetric or intricate structures, they have been modified by desymmetrization with two more different ligands. There is a need to establish new strategies that can desymmetrize structures in simple way using only one type of ligand, which from the mixed-ligand approach. In this study, strategy was developed form interconvertible stereoisomers unsymmetric macrocyclic ligand benzimidazole[3]arene. Single-crystal X-ray diffraction analysis revealed isomers assembled silver tetrafluoroborate afforded conformationally heteroleptic Ag

Language: Английский

Citations

1