Photochemically Driven Molecular Devices and Machines

Silvi, Serena; Venturi, Margherita

doi:10.1002/9780470661345.smc196

Cited by 3 publications

(1 citation statement)

References 123 publications

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“…7b the conversion of trypsinogen into trypsin drives the oscillation in enzyme concentration). Of course, also photochemical processes 22 may be utilized to drive the system. Benefit of using photochemistry is that, unlike chemical fuels, these processes do not produce waste chemicals.…”

Section: A Formation-destruction Chemistrymentioning

confidence: 99%

Systems chemistry

et al. 2017

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Building on our ability to design and synthesise molecules and our understanding of the noncovalent interactions between these molecules, the chemical sciences are currently entering the new territory of Systems Chemistry. This young field aims to develop complex molecular systems showing emergent properties; i.e. properties that go beyond the sum of the characteristics of the individual consituents of the system. This review gives an impression of the state of the art of the field by showing a diverse number of recent highlights, including out-of-equilibrium self-assembly, chemically fuelled molecular motion, compartmentalised chemical networks and designed oscillators. Subsequently a number of current challenges related to the design of complex chemical systems are discussed, including those of creating concurrent formation-destruction systems, continuously maintaining chemical systems away from equilibrium, incorporating feedback loops and pushing replication chemistry away from equilibrium. Finally, the prospects for Systems Chemistry are discussed including the tantalizing vision of the de novo synthesis of life and the idea of self-synthesising and self-repairing chemical factories.

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Section: A Formation-destruction Chemistrymentioning

confidence: 99%

Systems chemistry

et al. 2017

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A Cholesterol Containing pH‐Sensitive Bistable [2]Rotaxane

et al. 2015

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A non‐symmetrical pH‐sensitive bistable [2]rotaxane that bears a cholesterol unit and a tetraphenylmethane group as stopper groups was designed and synthesized in 18 steps. The successful formation of the rotaxane was proven by NMR spectroscopy and MS/MS. Besides a permanent cationic alkylated triazolium unit, the axle contains a secondary amine that can act as a second pH‐sensitive binding site for a crown ether. Depending on the protonation state of this amine function, the crown ether reversibly changes its position by moving between the two binding sites along the axle, as revealed by NMR spectroscopy.

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

Deng,

Long,

Zhang

et al. 2024

Light Sci Appl

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

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Photochemically Driven Molecular Devices and Machines

Cited by 3 publications

References 123 publications

Systems chemistry

Systems chemistry

A Cholesterol Containing pH‐Sensitive Bistable [2]Rotaxane

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

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