Control of Surface Wettability Using Tripodal Light-Activated Molecular Motors

Chen, Kuang‐Yen; Ivashenko, Oleksii; Carroll, Gregory T.; Robertus, Jort; Kistemaker, Jos C. M.; London, Gábor; Browne, Wesley R.; Rudolf, Petra; Feringa, Ben L.

doi:10.1021/ja412110t

Cited by 136 publications

(169 citation statements)

References 62 publications

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“…124 Additionally, surface bound rotary motors have been used to achieve photochemical control of surface wettability. 125 These applications illustrate the potential of surface functionalization for amplification of motor function. Molecular switches can also be anchored to surfaces in systems exhibiting collective directional motion.…”

Section: Surface Functionalizationmentioning

confidence: 95%

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Artificial molecular motors

et al. 2017

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Motor proteins are nature's solution for directing movement at the molecular level. The field of artificial molecular motors takes inspiration from these tiny but powerful machines. Although directional motion on the nanoscale performed by synthetic molecular machines is a relatively new development, significant advances have been made. In this review an overview is given of the principal designs of artificial molecular motors and their modes of operation. Although synthetic molecular motors have also found widespread application as (multistate) switches, we focus on the control of directional movement, both at the molecular scale and at larger magnitudes. We identify some key challenges remaining in the field.

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Section: Surface Functionalizationmentioning

confidence: 95%

“…125 The stimuli-responsive molecular shuttle 61 is able to expose or conceal a fluoroalkane segment depending on the position of the macrocycle. They had shown previously that the macrocycle can discriminate between three binding moieties in the order fumaramide>succinamide>maleamide.…”

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confidence: 99%

Artificial molecular motors

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“…Due to the dynamic controllability of unidirectional rotation, the stereoselectively chiroptical inversion between the stable ( P ) form and the unstable ( M ) form is reversible with a variable half‐life by structural modification from 8 ns to 1.4 × 10 3 years 47, 48, 49, 50. The resulting tunability of geometrical charity has been significantly investigated to create photoactiving chiral catalysts in solvents51, 52 and polar switchovers on solid surfaces 53, 54, 55. To further overcome the obstacle of Brownian motion, the guest‐host mesogenic hybrid systems make it possible to achieve long‐range ordered function in photoresponsive 1D photonic crystals with standing helixes56, 57, 58 and rotating microobjects on lying helixes 59, 60.…”

Section: Introductionmentioning

confidence: 99%

Stimuli‐Directed Dynamic Reconfiguration in Self‐Organized Helical Superstructures Enabled by Chemical Kinetics of Chiral Molecular Motors

et al. 2017

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Dynamic controllability of self‐organized helical superstructures in spatial dimensions is a key step to promote bottom‐up artificial nanoarchitectures and functional devices for diverse applications in a variety of areas. Here, a light‐driven chiral overcrowded alkene molecular motor with rod‐like substituent is designed and synthesized, and its thermal isomerization reaction exhibits an increasing structural entropy effect on chemical kinetic analysis in anisotropic achiral liquid crystal host than that in isotropic organic liquid. Interestingly, the stimuli‐directed angular orientation motion of helical axes in the self‐organized helical superstructures doped with the chiral motors enables the dynamic reconfiguration between the planar (thermostationary) and focal conic (photostationary) states. The reversible micromorphology deformation processes are compatible with the free energy fluctuation of self‐organized helical superstructures and the chemical kinetics of chiral motors under different conditions. Furthermore, stimuli‐directed reversible nonmechanical beam steering is achieved in dynamic hidden periodic photopatterns with reconfigurable attributes prerecorded with a corresponding photomask and photoinduced polymerization.

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“…Promising applications have been demonstrated in nanotechnology,11, 46, 47 catalysis,48, 49 and anion binding,50, 51 amongst others. Unidirectional rotation is achieved by sequential photochemical E – Z isomerization and thermal helix inversion steps (Scheme 1 a).…”

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Light‐Gated Rotation in a Molecular Motor Functionalized with a Dithienylethene Switch

et al. 2018

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A multiphotochromic hybrid system is presented in which a light‐driven overcrowded alkene‐based molecular rotary motor is connected to a dithienylethene photoswitch. Ring closing of the dithienylethene moiety, using an irradiation wavelength different from the wavelength applied to operate the molecular motor, results in inhibition of the rotary motion as is demonstrated by detailed 1H‐NMR and UV/Vis experiments. For the first time, a light‐gated molecular motor is thus obtained. Furthermore, the excitation wavelength of the molecular motor is red‐shifted from the UV into the visible‐light region upon attachment of the dithienylethene switch.

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Control of Surface Wettability Using Tripodal Light-Activated Molecular Motors

Cited by 136 publications

References 62 publications

Artificial molecular motors

Artificial molecular motors

Stimuli‐Directed Dynamic Reconfiguration in Self‐Organized Helical Superstructures Enabled by Chemical Kinetics of Chiral Molecular Motors

Light‐Gated Rotation in a Molecular Motor Functionalized with a Dithienylethene Switch

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