Photo-responsive functional materials based on light-driven molecular motors

Light Science & Applications, Journal Year: 2024, Volume and Issue: 13(1)

Published: March 1, 2024

Abstract In the past two decades, research and development of light-triggered molecular machines have mainly focused on developing devices at nanoscale. A key scientific issue in field is how to amplify controlled motion molecules nanoscale along multiple length scales, such as mesoscopic or macroscopic scale, a more practical perspective, convert into changes properties material. Light-driven motors are able perform repetitive unidirectional rotation upon irradiation, which offers unique opportunities for responsive systems. With several reviews that focus design, synthesis operation nanoscale, photo-responsive materials based light-driven not been comprehensively summarized. present review, we first discuss strategy confining absolute relative by grafting surfaces. Secondly, examples self-assemble supramolecular polymers with high internal order illustrated. Moreover, will building covalently linked system polymeric gels liquid crystals generate complex functions. Finally, perspective toward future developments given. This review helps us getting clear picture understanding movement can be programmed light-responsive systems man-made adaptive invented, serve an important guideline further design advanced materials.

Language: Английский

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Ligand Exchanges Among [N-I⁺-N] Halogen Bonds: A Robust Strategy for the Construction of Functional Halogen-Bonded Organic Frameworks (XOFs)

ACS Materials Letters, Journal Year: 2024, Volume and Issue: 6(2), P. 508 - 516

Published: Jan. 3, 2024

The development of diverse linking methods in organic framework materials is crucial for advancing science and engineering. [N-X+-N] halogen bonds are a powerful tool constructing supramolecular aggregates, including halogen-bonded frameworks (XOFs), which have emerged as new class frameworks. However, the existing production XOFs often yields insoluble AgI byproducts, impeding XOF crystallinity, performance, functionality. Hence, alternative preparation required. Here, we present novel approach to 2D via reversible ligand exchange reactions, avoiding unwanted byproducts enhancing crystallinity. Notably, this successfully highly crystalline XOF-TPTE, was unattainable with previous method. XOF-TPTE exhibits exceptional catalytic activity recyclability upon Pd(II) loading, showing remarkable selective performance Heck coupling reactions indicating its potential applications. This method broadens construction horizons expands their

Language: Английский

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All-visible-light-driven stiff-stilbene photoswitches

Chemical Science, Journal Year: 2024, Volume and Issue: 15(18), P. 6763 - 6769

Published: Jan. 1, 2024

This work outlines a simple synthetic strategy providing formylated stiff-stilbenes. The photoisomerization of stiff-stilbenes could be fully controlled using visible light and is accompanied by high photostationary state distribution.

Language: Английский

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Photo-crosslinking polymers by dynamic covalent disulfide bonds

Chemical Communications, Journal Year: 2021, Volume and Issue: 57(77), P. 9838 - 9841

Published: Jan. 1, 2021

A simple and general strategy to construct photo-crosslinkable polymers by introducing sidechain 1,2-dithiolanes based on natural thioctic acid is presented.

Language: Английский

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Out‐of‐equilibrium supramolecular self‐assembling systems driven by chemical fuel

Aggregate, Journal Year: 2021, Volume and Issue: 2(5)

Published: Aug. 24, 2021

Abstract A rich variety of smart materials developed via supramolecular assembly strategies have been introduced in the past decades. However, most reside thermodynamic equilibrium state, opposed to those nonequilibrium structures with sophisticated functions that are observed living systems. To develop advanced synthetic systems, chemists begun focus on how use similar used biological systems for fabricating artificial out‐of‐equilibrium Heretofore, a developed. In this review, we summarized recent progress and categorized them terms chemical fuel used, including adenosine triphosphate (ATP), acid/base, carbodiimide reagents, many others. For these self‐assembling their design strategies, potential applications, as well advantageous features discussed. At end remaining challenges an outlook chemical‐fuel‐driven were also It is believed review has provided some insights could be useful who interested assembling subsequent constructing various transient materials.

Language: Английский

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Light‐Controlled Destruction and Assembly: Switching between Two Differently Composed Cage‐Type Complexes

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 62(1)

Published: Oct. 10, 2022

We report on two regioisomeric, diazocine ligands 1 and 2 that can both be photoswitched between the E- Z-configurations with violet green light. The self-assembly of four species (1-Z, 1-E, 2-Z, 2-E) CoII ions was investigated upon changing coordination vectors as a function ligand configuration (E vs Z) regioisomer (1 2). With 1-Z, Co2 (1-Z)3 self-assembled, while mixture ill-defined (oligomers) observed 2-Z. Upon photoswitching 385 nm to E configurations, opposite 1-E forming oligomers 2-E (2-E)3 . Light-controlled dis/assembly demonstrated in competition experiment sub-stoichiometric amounts ions; alternating irradiation light resulted reversible transformation over multiple cycles without significant fatigue by photoswitching.

Language: Английский

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Supramolecular Polymerization as a Tool to Reveal the Magnetic Transition Dipole Moment of Heptazines

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(23), P. 15843 - 15849

Published: May 30, 2024

Heptazine derivatives have attracted significant interest due to their small S1-T1 gap, which contributes unique electronic and optical properties. However, the nature of lowest excited state remains ambiguous. In present study, we characterize transition heptazine by its magnetic dipole moment. To measure moment, flat must be chiroptically active, is difficult achieve for single molecules. Therefore, used supramolecular polymerization as an approach make homochiral stacks derivatives. Upon formation polymers, preferred helical stacking introduces circular polarization absorption fluorescence. The moments S1 ← S0 → are determined 0.35 0.36 Bohr magneton, respectively. These high values support intramolecular charge transfer from nitrogen carbon in further confirm degeneracy T1.

Language: Английский

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Light‐Triggered Disassembly of Molecular Motor‐based Supramolecular Polymers Revealed by High‐Speed AFM

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(14)

Published: Feb. 19, 2024

Photoresponsive supramolecular polymers have a major potential for applications in responsive materials that are externally triggered by light with spatio-temporal control of their polymerisation state. While changes macroscopic properties revealed the adaptive nature these materials, it remains challenging to capture dynamic depolymerisation process at molecular level, which requires fast observation techniques combined situ irradiation. By implementing UV illumination into High-Speed Atomic Force Microscope (HS-AFM) setup, we been able disassembly light-driven motor-based polymer. The real-time visualisation light-triggered not only reveals cooperative depolymerisation, also shows this continues after is halted. Combining data cryo-electron microscopy and spectroscopy approaches, obtain molecular-level description polymer dynamics reminiscent actin chain-end depolymerisation. Our detailed understanding will drive development future systems.

Language: Английский

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Three-State Switching of an Anthracene Extended Bis-thiaxanthylidene with a Highly Stable Diradical State

Journal of the American Chemical Society, Journal Year: 2021, Volume and Issue: 143(43), P. 18020 - 18028

Published: Oct. 25, 2021

A multistable molecular switching system based on an anthracene-extended bis-thiaxanthylidene with three individually addressable states that can be interconverted by electrochemical, thermal, and photochemical reactions is reported. Besides reversible between open-shell diradical- a closed-shell electronic configuration, our findings include third dicationic state control multiple actuators. This orthogonal conformation switched electrochemically the neutral triplet conformation, which was characterized EPR. The remarkably stable diradical shows kinetic stability as result of significant activation barrier for isomerization to more folded geometry. We ascribe this ΔG⧧(293 K) = 25.7 kcal mol–1 steric hindrance in fjord region overcrowded alkene structure. converted back irradiation 385 nm. also oxidized state. These types molecules switchable particular diradicals show great potential design new functional materials such memory devices, logic gates, OFETs.

Language: Английский

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Deep eutectic solvent based adhesive with dynamic adhesion, water-resistant and NIR-responsive retrieval properties

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 439, P. 135646 - 135646

Published: March 5, 2022

Language: Английский

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