Coupled adsorption and photocatalysis of g-C3N4 based composites: Material synthesis, mechanism, and environmental applications

Chemical Engineering Journal, Год журнала: 2022, Номер 453, С. 139755 - 139755

Опубликована: Окт. 17, 2022

Язык: Английский

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Mechanically interlocked polymers based on rotaxanes

Chemical Society Reviews, Год журнала: 2022, Номер 51(16), С. 7046 - 7065

Опубликована: Янв. 1, 2022

The nature of mechanically interlocked molecules (MIMs) has continued to encourage researchers design and construct a variety high-performance materials. Introducing structures into polymers led novel polymeric materials, called (MIPs). Rotaxane-based MIPs are an important class, where the characteristic retains high degree structural freedom mobility their components, such as rotation sliding motions rotaxane units. Therefore, these MIP materials known possess unique set properties, including mechanical robustness, adaptability responsiveness, which endow them with potential applications in many emerging fields, protective intelligent actuators, mechanisorption. In this review, we outline synthetic strategies, structure-property relationships, application explorations various polyrotaxanes, linear polyrotaxane networks, dendrimers.

Язык: Английский

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Autonomous fuelled directional rotation about a covalent single bond

Nature, Год журнала: 2022, Номер 604(7904), С. 80 - 85

Опубликована: Апрель 6, 2022

Язык: Английский

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Vitamin C modified crayfish shells biochar efficiently remove tetracycline from water: A good medicine for water restoration

Chemosphere, Год журнала: 2022, Номер 311, С. 136884 - 136884

Опубликована: Окт. 17, 2022

Язык: Английский

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Highly efficient and selective extraction of gold by reduced graphene oxide

Nature Communications, Год журнала: 2022, Номер 13(1)

Опубликована: Авг. 2, 2022

Materials that are capable of extracting gold from complex sources, especially electronic waste (e-waste) with high efficiency needed for resource sustainability and effective e-waste recycling. However, it remains challenging to achieve extraction capacity trace amount gold, precise selectivity over a wide range co-existing elements. Here we report reduced graphene oxide (rGO) material has an ultrahigh amounts (1,850 mg/g 1,180 10 ppm 1 gold). The excellent behavior is accounted the areas oxidized regions rGO. spontaneously reduce ions metallic provide good dispersibility so efficient adsorption reduction by area can be realized. rGO also highly selective ions. By controlling protonation process functional groups on rGO, shows exclusive without 14 elements seen in e-waste. These discoveries further exploited efficient, continuous recycling scalability economic viability, as exemplified using membrane based flow-through process.

Язык: Английский

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An electric molecular motor

Nature, Год журнала: 2023, Номер 613(7943), С. 280 - 286

Опубликована: Янв. 11, 2023

Macroscopic electric motors continue to have a large impact on almost every aspect of modern society. Consequently, the effort towards developing molecular

Язык: Английский

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Guideline for modeling solid-liquid adsorption: Kinetics, isotherm, fixed bed, and thermodynamics

Chemosphere, Год журнала: 2023, Номер 349, С. 140736 - 140736

Опубликована: Ноя. 21, 2023

Язык: Английский

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Molecular Ratchets and Kinetic Asymmetry: Giving Chemistry Direction

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(23)

Опубликована: Апрель 3, 2024

Abstract Over the last two decades ratchet mechanisms have transformed understanding and design of stochastic molecular systems—biological, chemical physical—in a move away from mechanical macroscopic analogies that dominated thinking regarding dynamics in 1990s early 2000s (e.g. pistons, springs, etc), to more scale‐relevant concepts underpin out‐of‐equilibrium research sciences today. Ratcheting has established nanotechnology as frontier for energy transduction metabolism, enabled reverse engineering biomolecular machinery, delivering insights into how molecules ‘walk’ track‐based synthesisers operate, acceleration reactions enables be transduced by catalysts (both motor proteins synthetic catalysts), dynamic systems can driven equilibrium through catalysis. The recognition biology, their invention systems, is proving significant areas diverse supramolecular chemistry, covalent DNA nanotechnology, polymer materials science, heterogeneous catalysis, endergonic synthesis, origin life, many other branches science. Put simply, give chemistry direction. Kinetic asymmetry, key feature ratcheting, counterpart structural asymmetry (i.e. chirality). Given ubiquity processes significance behaviour function it surely just fundamentally important. This Review charts recognition, development ratchets, focussing particularly on role which they were originally envisaged elements machinery. Different kinetically asymmetric are compared, consequences discussed. These archetypal examples demonstrate inexorably equilibrium, rather than relax towards it.

Язык: Английский

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Kinetic Asymmetry and Directionality of Nonequilibrium Molecular Systems

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(9)

Опубликована: Янв. 18, 2024

Abstract Scientists have long been fascinated by the biomolecular machines in living systems that process energy and information to sustain life. The first synthetic molecular rotor capable of performing repeated 360° rotations due a combination photo‐ thermally activated processes was reported 1999. progress designing different intervening years has remarkable, with several outstanding examples appearing last few years. Despite accomplishments, there remains confusion regarding fundamental design principles which motions molecules can be controlled, significant intellectual tension between mechanical chemical ways thinking about describing machines. A thermodynamically consistent analysis kinetics rotors pumps shows while light driven operate power‐stroke mechanism, kinetic asymmetry—the relative heights barriers—is sole determinant directionality catalysis Power‐strokes—the depths wells—play no role whatsoever determining sign directionality. These results, elaborated using trajectory thermodynamics nonequilibrium pump equality, show asymmetry governs response many non‐equilibrium phenomena.

Язык: Английский

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A molecular anion pump

Science, Год журнала: 2024, Номер 385(6708), С. 544 - 549

Опубликована: Авг. 1, 2024

Pumping ions against a concentration gradient through protein-based transporters is cornerstone of numerous biological processes. Mimicking this function by using artificial receptors remains daunting challenge, mainly because the difficulties in balancing between requirement for high binding affinities and precise on-demand ion capture release properties. We report trimeric hydrazone photoswitch-based receptor that converts light energy into work actively transporting chloride anion dichloromethane liquid membrane, functioning as molecular pump. The system manifests ease synthesis, bistability, excellent photoswitching properties, superb ON-OFF properties (difference up to six orders magnitude).

Язык: Английский

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