Surface Inclusion of Unidirectional Molecular Motors in Hexagonal Tris(<i>o</i>-phenylene)cyclotriphosphazene

Kaleta, Jiřı́; Chen, Jiawen; Bastien, Guillaume; Dračínský, Martin; Mašát, Milan; Rogers, Charles T.; Feringa, Ben L.; Michl, Josef

doi:10.1021/jacs.7b05404

Cited by 56 publications

(84 citation statements)

References 67 publications

(104 reference statements)

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“…To the best of our knowledge, only one example by Feringa and Michl reports the inclusion of unidirectional light‐driven molecular motors in mesoporous materials made of a hexagonal tris( o ‐phenylene)cyclotriphosphazene (TPP) crystal host . X‐ray diffraction along with 31 P and 13 C solid‐state NMR experiments confirmed the formation of inclusion compounds, with motors standing on the facets of the disc‐shaped nanocrystals.…”

Section: Molecular Machines At Surfaces and Interfacesmentioning

confidence: 99%

From Molecular Machines to Stimuli‐Responsive Materials

et al. 2019

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Shape-memory effects and mechanical actuations can be indeed generated from objects of various chemical nature [3][4][5] (e.g., metallic alloys, ceramics, liquid crystals, or polymers), and they are often supported by a combination of bottom-up and top-down structural engineering techniques going from surfaces to 3D materials (e.g., supramolecular self-assembly, photopatterning, microfluidics, or inkjet printing). [6,7] Various stimuli can generate their response (e.g., molecules, temperature, light, electrical potential, or mechanical stress) and their functioning principles vary largely from one system to another, involving a number of physical phenomena which can take place at the (macro)molecular level and which are transferred toward higher length scales (e.g., polarity, solubility-such as lower critical solution temperature (LCST), osmotic pressure, surface energy, or phase transition). It should also be mentioned that bio-inspiration is often a driving force in the design of such artificial materials as many smart mechano-active systems with adaptable properties are found in nature (e.g., stiffness change of sea cucumber, adaptive toughness of spider silk, closure of mimosa leaves when touched, or opening of seed pods). [8][9][10] Since the early 2000s, exciting opportunities have emerged in the scientific community for making use of artificial molecular machines as the elementary responsive building blocks in new types of stimuli-responsive materials. This approach is fundamentally disruptive compared to the others developed so far, because it aims to exploit precisely controlled mechanical motions at molecular level (produced by the machines), and to amplify them in collective mechanical motions taking place at larger dimensions up to the material's length scale. The most prominent example of what could be potentially achieved in the far future by such artificial materials is also found in nature, in the form of striated muscle tissue. In muscles, by using adenosine triphosphate (ATP) as chemical fuel, millions of myosin motors, which individually cycle hundreds of few nanometers scale actuations, are able to pull synchronously on sliding actin filaments and to produce micrometric contractions of sarcomeric units. Further hierarchical organizations of sarcomeres in bundled fibrils and fibers result in a macroscopic contraction of the muscle. At that point, and before describing selected examples of (much simpler) artificial systems, it is important for the readers who would not be familiar with molecular machines to first introduce more precisely terms and notions which define their nature and actuation principles. Artificial molecular machines are able to produce and exploit precise nanoscale actuations in response to chemical or physical triggers. Recent scientific efforts have been devoted to the integration, orientation, and interfacing of large assemblies of molecular machines in order to harness their collective actuations at larger length scale and up to the generation of macroscopic motions. Maki...

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Section: Molecular Machines At Surfaces and Interfacesmentioning

confidence: 99%

From Molecular Machines to Stimuli‐Responsive Materials

et al. 2019

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“…Several species evolved from the parent compound 1 have been developed and extensively investigated, and motors capable of rotating at room temperature with MHz frequencies upon visible light irradiation are now available. It was also shown that the light‐driven unidirectional rotation is preserved when the motors are deposited on macroscopic or nanostructured surfaces, embedded in membranes, and incorporated in soft or hard materials. Indeed, the robustness of the motor function is one of the main reasons for the widespread use of these compounds in the search for technological applications of artificial molecular machines.…”

Section: Basic Types Of Photochemically Driven Molecular Machinesmentioning

confidence: 99%

Photoactivated Artificial Molecular Machines that Can Perform Tasks

et al. 2020

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The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adma.201906064.Research on artificial photoactivated molecular machines has moved in recent years from a basic scientific endeavor toward a more applicative effort. Nowadays, the prospect of reproducing the operation of natural nanomachines with artificial counterparts is no longer a dream but a concrete possibility. The progress toward the construction of molecular-machinebased devices and materials in which light irradiation results in the execution of a task as a result of nanoscale movements is illustrated here. After a brief description of a few basic types of photoactivated molecular machines, significant examples of their exploitation to perform predetermined functions are presented. These include switchable catalysts, nanoactuators that interact with cellular membranes, transporters of small molecular cargos, and active joints capable of mechanically coupling molecular-scale movements. Investigations aimed at harnessing the collective operation of a multitude of molecular machines organized in arrays to perform tasks at the microscale and macroscale in hard and soft materials are also reviewed. Surfaces, gels, liquid crystals, polymers, and self-assembled nanostructures are described wherein the nanoscale movement of embedded molecular machines is amplified, allowing the realization of muscle-like actuators, microfluidic devices, and polymeric materials for light energy transduction and storage.

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“…Recently, Feringa and coworkers designed a host–guest inclusion complex system comprising a light‐driven molecular motor and tris( o ‐phenylene)cyclotriphosphazene (TPP). In this system, the long shafts modified on the rotors provide recognition sites for host–guest interactions with disc‐shaped TPP crystals, leading to the coverage of their large facets with regular 2D trigonal arrays (Figure ).…”

Section: Microscale Applicationsmentioning

confidence: 99%

Section: Microscale Applicationsmentioning

confidence: 99%

Driving Smart Molecular Systems by Artificial Molecular Machines

Shi

Zhang

Tian

et al. 2020

Advanced Intelligent Systems

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Biomolecular machines are widely present in nature, especially in complex living organisms, and are involved in important biological processes. Inspired by nature and increasingly mature synthetic technologies, a series of artificial molecular machines (AMMs) that exhibit similar processes and functions as biomolecular counterparts have been developed, and to date, some dramatic achievements have been obtained. Herein, the use of AMMs in smart systems and materials with controllable regulations and interesting functions are summarized, presenting the specific micro‐ to macroscale applications in solid surface modification, transmembrane transport, smart catalysts, liquid crystals, artificial molecular muscles, and stimuli‐responsive polymers. The challenges of developing novel complex AMMs with intelligent functions are discussed, and some potential solutions are proposed.

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Surface Inclusion of Unidirectional Molecular Motors in Hexagonal Tris(o-phenylene)cyclotriphosphazene

Cited by 56 publications

References 67 publications

From Molecular Machines to Stimuli‐Responsive Materials

From Molecular Machines to Stimuli‐Responsive Materials

Photoactivated Artificial Molecular Machines that Can Perform Tasks

Driving Smart Molecular Systems by Artificial Molecular Machines

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