Organic Chemistry Frontiers, Journal Year: 2024, Volume and Issue: 11(10), P. 2954 - 2980
Published: Jan. 1, 2024
Mechanically interlocked molecules (MIMs) which include rotaxanes and catenanes are formed by the mechanical linking of two or more components has ability to switch between different states in presence an external stimuli.
Language: Английский
Chemical Reviews, Journal Year: 2023, Volume and Issue: 123(8), P. 4602 - 4634
Published: April 6, 2023
Porous organic cages (POCs) are a relatively new class of low-density crystalline materials that have emerged as versatile platform for investigating molecular recognition, gas storage and separation, proton conduction, with potential applications in the fields porous liquids, highly permeable membranes, heterogeneous catalysis, microreactors. In common extended structures, such metal–organic frameworks (MOFs), covalent (COFs), polymers (POPs), POCs possess all advantages specific surface areas, porosities, open pore channels, tunable structures. addition, they discrete structures exhibit good to excellent solubilities solvents, enabling their solution dispersibility processability─properties not readily available case well-established, insoluble, frameworks. Here, we present critical review summarizing detail recent progress breakthroughs─especially during past five years─of while taking close look at strategic design, precise synthesis, including both irreversible bond-forming chemistry dynamic chemistry, advanced characterization, diverse applications. We highlight representative POC examples an attempt gain some understanding structure–function relationships. also discuss future challenges opportunities application POCs. anticipate this will be useful researchers working field when it comes designing developing desired functions.
Language: Английский
Citations
215
Nature, Journal Year: 2023, Volume and Issue: 613(7943), P. 280 - 286
Published: Jan. 11, 2023
Macroscopic electric motors continue to have a large impact on almost every aspect of modern society. Consequently, the effort towards developing molecular
Language: Английский
Citations
90
ACS Catalysis, Journal Year: 2023, Volume and Issue: 13(5), P. 2790 - 2801
Published: Feb. 9, 2023
Restricted by the limited exciton diffusion and unproductive recombination, efficiency of photon-to-chemical conversion on polymeric carbon nitride (CN) photocatalyst is generally unsatisfactory. The rational design an efficient challenging due to ambiguous understanding structure–property–photocatalytic activity relationship. study herein demonstrates unprecedently for photoproduction hydrogen peroxide (H2O2), as well mechanistic rationale behind remarkable catalytic performance. Anchoring cationic methyl viologen (MV) CN with anionic moiety generates ionic link elicits internal local electric field in organic framework, which significantly enhances dissociation. Femtosecond transient absorption spectroscopy analysis that MV surface complex-induced favors generation long-lived trapped electron, especially under high photon-flux irradiation >450 mW cm–2. CN–MV thus exhibits superior photocatalytic performance H2O2 production, example, 114.2 mM a 53 min reaction continuous microbatch photoreactor. apparent quantum yield reaches value 51.1%. present highlights significant impact complex electronic energy landscape toward enhanced dissociation hence improved various applications.
Language: Английский
Citations
44
Chemical Communications, Journal Year: 2024, Volume and Issue: 60(17), P. 2261 - 2282
Published: Jan. 1, 2024
This comprehensive review provides various perspectives on porous organic cages, encompassing their synthesis methods, structural attributes, material properties, computational methodologies, and diverse applications.
Language: Английский
Citations
19
Nature Communications, Journal Year: 2022, Volume and Issue: 13(1)
Published: Dec. 24, 2022
Molecular recognition is an attractive approach to designing sensitive and selective sensors for volatile organic compounds (VOCs). Although macrocycles cages have been well-developed recognising organics by their adaptive pockets in liquids, porous solids gas detection require a deliberate design balancing adaptability robustness. Here we report dynamic 3D covalent framework (dynaCOF) constructed from environmentally fluorophore that can undergo concerted structural transitions upon adsorption of vapours. The COF capable rapid reliable various VOCs, even non-polar hydrocarbon under humid conditions. guest inclusion amplifies the host-guest interactions facilitates differentiation vapours polarity sizes/shapes, covalently linked interwoven networks ensure robustness coherency materials. present result paves way multiplex fluorescence sensing VOCs with molecular-specific responses.
Language: Английский
Citations
69
Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 62(1)
Published: Sept. 22, 2022
Abstract The tetracationic cyclophane, cyclobis(paraquat‐ p ‐phenylene), also known as the little blue box, constitutes a modular receptor that has facilitated discovery of many host–guest complexes and mechanically interlocked molecules during past 35 years. Its versatility in binding small π‐donors its state, well forming trisradical tricationic with viologen radical cations doubly reduced bisradical dicationic renders it valuable for construction various stimuli‐responsive materials. Since first reports 1988, box been featured over 500 publications literature. All this research activity would not have possible without seminal contributions carried out by Siegfried Hünig, who only pioneered syntheses viologen‐containing cyclophanes, but revealed their rich redox chemistry addition to ability undergo intramolecular π‐dimerization. This Review describes how his pioneering led design synthesis redox‐active host evolved into key component molecular shuttles, switches, machines.
Language: Английский
Citations
39
Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(26), P. 14498 - 14509
Published: June 16, 2023
Aiming at the construction of novel soft actuators through amplified motions molecular machines nanoscale, design and synthesis a new family photoresponsive rotaxane-branched dendrimers an efficient controllable divergent approach was successfully realized for first time. In third-generation dendrimers, up to 21 azobenzene-based rotaxane units located each branch, thus making them successful light-control integrated artificial machines. Notably, upon alternative irradiation with UV visible light, photoisomerization azobenzene stoppers leads collective precisely arranged units, resulting in reversible dimension modulation integrating solution. Moreover, macroscopic were further constructed based on these which revealed fast shape transformation behaviors actuating speed 21.2 ± 0.2° s-1 ultraviolet irradiation. More importantly, resultant could produce mechanical work light control that has been employed weight-lifting cargo transporting, laying foundation toward smart materials can perform programmed events.
Language: Английский
Citations
35
Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)
Published: Aug. 15, 2023
Crystalline frameworks containing incorporated flexible macrocycle units can afford new opportunities in molecular recognition and selective separation. However, such functionalized are difficult to prepare challenging characterize due the nature of macrocycles, which limits development macrocycle-based crystalline frameworks. Herein, we report design synthesis a set metal-organic (MOFs) pillar[5]arene units. The were uniformly embedded periodic Single crystal X-ray diffraction analysis revealed an interpenetrated network that appears hinder rotation repeating frameworks, it therefore resulted successful determination precise host structure MOF crystal. These MOFs recognize paraquat 1,2,4,5-tetracyanobenzene solution selectively remove trace pyridine from toluene with relative ease. work presented here represents critical step towards macrocycle-incorporated well-defined structures functional utility.
Language: Английский
Citations
35
Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(47)
Published: Aug. 7, 2023
Abstract Non‐equilibrium chemical systems underpin multiple domains of contemporary interest, including supramolecular chemistry, molecular machines, prebiotic and energy transduction. Experimental chemists are now pioneering the realization artificial that can harvest away from equilibrium. In this tutorial Review, we provide an overview ratchets: mechanisms enabling absorption environment. By focusing on mechanism type—rather than application domain or source—we offer a unifying picture seemingly disparate phenomena, which hope will foster progress in fascinating science.
Language: Английский
Citations
33
ChemistrySelect, Journal Year: 2024, Volume and Issue: 9(14)
Published: April 9, 2024
Abstract It has achieved the preparation of quasi‐deoxyribonucleic acid (DNA) origami using techniques organized molecular films. After adsorption DNA from subphase onto a Langmuir monolayer polymers containing diamino‐ s ‐triazine rings, collapses owing to high surface pressure, resulting in formation three‐dimensional folded structure DNA. A homopolymer featuring ring and copolymer 20 % long alkyl chains are used form monolayer. A‐T base pairs salmon testis‐derived hydrogen‐bonded adsorbed each Following collapse monolayer, film height almost doubles, indicating bilayer consisting bioadsorbed polymer especially evident copolymer‐collapsed During this period, bioconjugated adopts mesoscopic linear morphology within plane. In quasi‐DNA structure, chirality molecule is maintained, as evidenced by circular dichroism (CD) spectra displaying positive Cotton effect. These results correspond proposal new control technology.
Language: Английский
Citations
11