Negatively Curved Octagon‐Incorporated Aza‐nanographene and its Assembly with Fullerenes

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(15)

Published: Feb. 12, 2024

Abstract A negatively curved aza‐nanographene (NG) containing two octagons was synthesized by a regioselective and stepwise cyclodehydrogenation procedure, in which double aza[7]helicene simultaneously formed as an intermediate. Their saddle‐shaped structures with negative curvature were unambiguously confirmed X‐ray crystallography, thereby enabling the exploration of structure–property relationship photophysical, electrochemical conformational studies. Moreover, assembly octagon‐embedded aza‐NG fullerenes probed fluorescence spectral titration, record‐high binding constants ( K =9.5×10 3 M −1 C 60 , =3.7×10 4 70 ) found among reported polycyclic aromatic compounds. The tight association further elucidated diffraction analysis their co‐crystal, showed formation 1 : complex substantial concave‐convex interactions.

Language: Английский

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BINOL‐Based Chiral Macrocycles and Cages

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(29)

Published: May 6, 2024

Abstract Chirality, a fundamental principle in chemistry, biology, and medicine, is prevalent nature organisms. Chiral molecules, such as DNA, RNA, proteins, are crucial biomolecular synthesis, well the development of functional materials. Among these, 1,1′‐binaphthyl‐2,2′‐diol (BINOL) stands out for its stable chiral configuration, versatile functionality, commercial availability. BINOL widely employed asymmetric catalysis This review mainly focuses on recent research over past five years concerning use derivatives constructing macrocycles cages. Their contributions to luminescence, enantiomeric separation, transmembrane transport, were examined.

Language: Английский

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N-Doped Zigzag-Type Aromatic Truncated Cone Belts

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

Published: Jan. 2, 2025

Zigzag aromatic hydrocarbon belts, ultrashort segments of zigzag carbon nanotubes, have been fascinating in the chemistry community for more than a half century because their aesthetically appealing molecular nanostructures and tantalizing applications. Precise introduction heteroatoms distinct electronegativity electronic configuration can create various heterocyclic nanobelts with novel physical chemical properties. Here, we report synthesis unprecedented N-doped zigzag-type belt[

Language: Английский

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Cocrystals of axially N-embedded quasi-carbon nanohoops via modulating the electron affinity of guest acceptors

Science China Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 16, 2025

Language: Английский

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Computer-aided fabrication of an iron-tip enhanced nanocone for providing a smart carrier of Cycloserine (Seromycin) drug through a potential delivery process

Materials Chemistry and Physics, Journal Year: 2025, Volume and Issue: unknown, P. 130646 - 130646

Published: March 1, 2025

Language: Английский

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Dimensionality Engineering toward Carbon Materials for Electrochemical CO₂ Reduction: Progress and Prospect

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(46)

Published: Aug. 9, 2024

Abstract Carbon materials are of great significance in state‐of‐the‐art electrochemical CO 2 reduction (ECR) as key components such electrocatalysts, gas diffusion electrodes, and current collectors. Notably, dimensionalities carbons related manipulations play vital roles boosting ECR performance, e.g., mass/charge transfer dynamics, exposure active sites, reaction space, product's Faradaic efficiency/selectivity, durability. Here, recent endeavors dimensionality engineering toward advanced carbon‐based for is first summarized, including pure (e.g., carbon nanotube graphene) composites, highlight the dimensionality‐dependent properties performance. Various strategies referring to modulation integration have been top‐down, bottom‐up, soft chemical approaches. Design principles dimensionality‐varied elaborated, impacts surface chemistry functional group, wettability, electronic structure) on kinetics product‐targeted mechanisms also scrutinized. Some insights into how manipulation elevates performance acceleration, kinetics, product selectivity provided. At last, a perspective challenges future development discussed. This review aims at providing guidance customizable construction with dependence green energy‐saving electrosynthesis systems.

Language: Английский

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Synthesis, Characterization, and Resistive Memory Behaviors of Highly Strained Cyclometalated Platinum(II) Nanohoops

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(19), P. 13226 - 13235

Published: May 3, 2024

Strained carbon nanohoops exhibit attractive photophysical properties due to their unique π-conjugated structure. However, incorporation of such into the pincer ligand metal complexes has rarely been explored. Herein, a new family highly strained cyclometalated platinum(II) synthesized and characterized. Strain-promoted C–H bond activation observed during coordination process, Hückel–Möbius topology random-columnar packing in solid state are found. Transient absorption spectroscopy revealed size-dependent excited nanohoops. Moreover, have successfully employed as active materials fabrication solution-processable resistive memory devices, including use smallest nanohoop for binary memory, with low switching threshold voltages ca. 1.5 V, high ON/OFF current ratios, good stability. These results demonstrate that strain structure can be an effective strategy fundamentally fine-tune reactivity, optoelectronic, properties.

Language: Английский

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Multipocket Cage Enables the Binding of High-Order Bulky and Drug Guests Uncovered by MS Methodology

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(31), P. 21677 - 21688

Published: July 23, 2024

Achieving high guest loading and multiguest-binding capacity holds crucial significance for advancement in separation, catalysis, drug delivery with synthetic receptors; however, it remains a challenging bottleneck characterization of high-stoichiometry guest-binding events. Herein, we describe large-sized coordination cage (MOC-70-Zn

Language: Английский

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Chiral stacks of a curved nanographene

Chem, Journal Year: 2024, Volume and Issue: 10(10), P. 3199 - 3211

Published: Aug. 12, 2024

Language: Английский

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Hierarchical Self‐Assembly of Curved Aromatics: From Donor–Acceptor Porphyrins to Triply Periodic Minimal Surfaces

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(9)

Published: Jan. 10, 2024

Abstract A saddle‐shaped π‐extended zinc porphyrin containing a peripheral pyridyl ligand undergoes quantitative self‐assembly into cyclic trimer. The trimer has prismatic structure with negatively curved side walls, which promote the formation of supramolecular organic frameworks stabilized by dispersion interactions. first framework type, UWr‐1 , npo topology, hexagonal analogous to Schwartz H triply periodic minimal surface. Co‐crystallization either C 60 and 70 produces isomorphous cubic UWr‐2 UWr‐3 phases, characterized ctn network topology structural relationship Fischer‐Koch surface S. All three phases contain complex labyrinths solvent‐filled channels, corresponding very large probe‐accessible volumes (68 % 76 %). could be partly desolvated while retaining its long range dimensional order, indicating remarkable strength interactions in crystal. theoretical analysis noncovalent shows role geometrical matching between units positively fullerenes.

Language: Английский

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