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Chiral Materials
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Chiral Materials

A special issue of Materials (ISSN 1996-1944).

Deadline for manuscript submissions: closed (30 September 2021) | Viewed by 7781

Special Issue Editor

Dr. Yuri Gorodetski

E-Mail Website
Guest Editor
Ariel University, Department of Electrical and Electronic Engineering, Ariel, Israel
Interests: plasmonic spin-orbit interaction; chiral plasmonics; time resolved plasmonic imaging; Nanophotonics

Special Issue Information

Dear Colleagues,

The interaction of light with chiral structures has recently become an important research topic owing to its fundamental physical importance as well as the high potential for diverse technological implementations. Nanostructured materials—metamaterials and metasurfaces—form promising routes for ultra-compact optical elements, thus providing extended control over new functionalities. Chiral structures are known to induce a different optical response for the illumination of right- and left-handed circular polarization or so called optical activity. While the chiral signature of natural materials is rather weak, the nanostructured materials have the advantage of enhancing the optical activity in several orders of magnitude, providing an intriguing platform for sensing and a novel type of light–matter interaction.

In this Special Issue, the progress of current and novel research avenues in chiral materials and chiral light matter interactions will be discussed.

It is my pleasure to invite you to submit a manuscript to this Special Issue. Full papers, communications, and reviews are all welcome.

Dr. Yuri Gorodetski
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • chiral light
  • metasurfaces/metamaterials
  • chiral plasmonics
  • structured light

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Published Papers (2 papers)

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Research

16 pages, 4837 KiB  
Article
Adsorption of Chiral [5]-Aza[5]helicenes on DNA Can Modify Its Hydrophilicity and Affect Its Chiral Architecture: A Molecular Dynamics Study
by Giuseppina Raffaini, Andrea Mele and Tullio Caronna
Materials 2020, 13(21), 5031; https://doi.org/10.3390/ma13215031 - 7 Nov 2020
Cited by 5 | Viewed by 3089
Abstract
Helicenes are interesting chiral molecules without asymmetric carbon atoms but with intrinsic chirality. Functionalized 5-Aza[5]helicenes can form non-covalent complexes with anticancer drugs and therefore be potential carriers. The paper highlights the different structural selectivity for DNA binding for two enantiopure compounds and the [...] Read more.
Helicenes are interesting chiral molecules without asymmetric carbon atoms but with intrinsic chirality. Functionalized 5-Aza[5]helicenes can form non-covalent complexes with anticancer drugs and therefore be potential carriers. The paper highlights the different structural selectivity for DNA binding for two enantiopure compounds and the influence of concentration on their adsorption and self-aggregation process. In this theoretical study based on atomistic molecular dynamics simulations the interaction between (M)- and (P)-5-Aza[5]helicenes with double helix B-DNA is investigated. At first the interaction of single pure enantiomer with DNA is studied, in order to find the preferred site of interaction at the major or minor groove. Afterwards, the interaction of the enantiomers at different concentrations was investigated considering both competitive adsorption on DNA and possible helicenes self-aggregation. Therefore, racemic mixtures were studied. The helicenes studied are able to bind DNA modulating or locally modifying its hydrophilic surface into hydrophobic after adsorption of the first helicene layer partially covering the negative charge of DNA at high concentration. The (P)-enantiomer shows a preferential binding affinity of DNA helical structure even during competitive adsorption in the racemic mixtures. These DNA/helicenes non-covalent complexes exhibit a more hydrophobic exposed surface and after self-aggregation a partially hidden DNA chiral architecture to the biological environment. Full article
(This article belongs to the Special Issue Chiral Materials)
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19 pages, 6002 KiB  
Article
On Prediction of a Novel Chiral Material Y2H3O(OH): A Hydroxyhydride Holding Hydridic and Protonic Hydrogens
by Aleksandr Pishtshev, Evgenii Strugovshchikov and Smagul Karazhanov
Materials 2020, 13(4), 994; https://doi.org/10.3390/ma13040994 - 22 Feb 2020
Cited by 1 | Viewed by 3532
Abstract
Examination of possible pathways of how oxygen atoms can be added to a yttrium oxyhydride system allowed us to predict new derivatives such as hydroxyhydrides possessing the composition M2H3O(OH) (M = Y, Sc, La, and Gd) in which three [...] Read more.
Examination of possible pathways of how oxygen atoms can be added to a yttrium oxyhydride system allowed us to predict new derivatives such as hydroxyhydrides possessing the composition M2H3O(OH) (M = Y, Sc, La, and Gd) in which three different anions (H-, O2−, and OH-) share the common chemical space. The crystal data of the solid hydroxyhydrides obtained on the base of DFT modeling correspond to the tetragonal structure that is characterized by the chiral space group P 4 1 . The analysis of bonding situation in M2H3O(OH) showed that the microscopic mechanism governing chemical transformations is caused by the displacements of protons which are induced by interaction with oxygen atoms incorporated into the crystal lattice of the bulk oxyhydride. The oxygen-mediated transformation causes a change in the charge state of some adjacent hydridic sites, thus forming protonic sites associated with hydroxyl groups. The predicted materials demonstrate a specific charge ordering that is associated with the chiral structural organization of the metal cations and the anions because their lattice positions form helical curves spreading along the tetragonal axis. Moreover, the effect of spatial twisting of the H- and H+ sites provides additional linking via strong dihydrogen bonds. The structure–property relationships have been investigated in terms of structural, mechanical, electron, and optical features. It was shown that good polar properties of the materials make them possible prototypes for the design of nonlinear optical systems. Full article
(This article belongs to the Special Issue Chiral Materials)
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