Vortexes tune the chirality of graphene oxide and its non-covalent hosts

Mauro, Alessandro Di; Randazzo, Rosalba; Spanò, S.F.; Compagnini, Giuseppe; Gaeta, Massimiliano; D’Urso, Luisa; Paolesse, Roberto; Pomarico, Giuseppe; Natale, Corrado Di; Villari, Valentina; Micali, Norberto; Fragalà, Maria Elena; D’Urso, Alessandro; Purrello, Roberto

doi:10.1039/c6cc05177d

Cited by 19 publications

(15 citation statements)

References 37 publications

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“…In this regard, vortices have been utilized to induce chirality in graphene oxide (GO) aggregates. 29 These aggregates can in turn transfer chiral asymmetry to non-covalently bound porphyrin derivatives, inducing measurable CD signals.…”

Section: Absorption Of Circularly Polarized Lightmentioning

confidence: 99%

Optical processes in carbon nanocolloids

Ragazzon

Cadranel

Ushakova

et al. 2021

Chem

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Section: Absorption Of Circularly Polarized Lightmentioning

confidence: 99%

Optical processes in carbon nanocolloids

Ragazzon

Cadranel

Ushakova

et al. 2021

Chem

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“…Stirred solutions of graphene oxide could also be deposited on quartz to capture the transient, vortex-induced chirality of graphene oxide assemblies, providing an unusual route to chiral nanomaterials. 112 As with organic polymers, developing environmentally responsive and switchable materials is a priority in this field. 91 Light is a pervasive control element: an approach reported by Liu and co-workers involves photoswitching between chiroptically active and inactive states in gold nanorods.…”

Section: Transmission Of Chirality In Nanoscale Architecturesmentioning

confidence: 99%

Transmission of chirality through space and across length scales

2017

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Chirality is a fundamental property and vital to chemistry, biology, physics and materials science. The ability to use asymmetry to operate molecular-level machines or macroscopically functional devices, or to give novel properties to materials, may address key challenges at the heart of the physical sciences. However, how chirality at one length scale can be translated to asymmetry at a different scale is largely not well understood. In this Review, we discuss systems where chiral information is translated across length scales and through space. A variety of synthetic systems involve the transmission of chiral information between the molecular-, meso- and macroscales. We show how fundamental stereochemical principles may be used to design and understand nanoscale chiral phenomena and highlight important recent advances relevant to nanotechnology. The survey reveals that while the study of stereochemistry on the nanoscale is a rich and dynamic area, our understanding of how to control and harness it and dial-up specific properties is still in its infancy. The long-term goal of controlling nanoscale chirality promises to be an exciting journey, revealing insight into biological mechanisms and providing new technologies based on dynamic physical properties.

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“…Then, the obtained chirality was successfully transferred to GO support and the host molecules after simply clockwise (CW) and counterclockwise (CCW) dropcast stirring. 25 Based on the above, here we report a new type of enantioselective porous graphene membrane (PGM) by mechanical stirring. The front and back of the membrane display mirror-image circular dichroism (CD) signals.…”

mentioning

confidence: 95%

Preparation of Vortex Porous Graphene Chiral Membrane for Enantioselective Separation

et al. 2020

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Chiral materials are usually the key to the separation of chiral membranes. In this work, we propose a new strategy that chiral porous graphene membrane can be fabricated from nonchiral porous graphene by mechanical stirring to induce vortex structure. Porous graphene with controlled, nanosized pores was synthesized by a newly designed, one-pot process directly from graphite as opposed to graphene oxide. Then porous graphene was immobilized on ultrafiltration membrane through filtering while stirring to form porous graphene membrane, which was applied for enantioselective separation toward DL-amino acids: for example, the separation factor of L-/D-phenylalanine reached 4.76. Interestingly, we first observed that the front and back sides of the porous graphene membrane exhibited opposite optical activities.

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Vortexes tune the chirality of graphene oxide and its non-covalent hosts

Cited by 19 publications

References 37 publications

Optical processes in carbon nanocolloids

Optical processes in carbon nanocolloids

Transmission of chirality through space and across length scales

Preparation of Vortex Porous Graphene Chiral Membrane for Enantioselective Separation

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