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Special Issue "Mechanically Responsive Materials and Their Applications"

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Materials Chemistry".

Deadline for manuscript submissions: 30 June 2019

Special Issue Editors

Guest Editor
Prof. Dr. Elisabete C.B.A. Alegria

1. Chemical Engineering Departament, Instituto Superior de Engenharia de Lisboa, Instituto Politécnico de Lisboa, Lisboa, Portugal. 2. Centro de Química Estrutural, Complexo I, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
Website | E-Mail
Interests: coordination chemistry; sustainable homogeneous and supported catalysis; green synthesis of metallic nanoparticles; mechanochemistry (synthesis and catalysis); molecular electrochemistry
Guest Editor
Dr. Maximilian N. Kopylovich

Centro de Química Estrutural, Complexo I, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
Website | E-Mail
Interests: coordination chemistry; metal-mediated (template) synthesis, catalysis; alcohol oxidation; nitrile transformation; mechanochemistry; noncovalent interactions

Special Issue Information

Dear Colleagues,

To adapt to the changing environment, biological systems employ specific stimuli-responsive molecules and supramolecular assemblies. Accordingly, the complex adaptation is possible due to the dynamic molecular tuning by regulating signals, e.g., specific compounds, temperature change, redox event or electromagnetic irradiation. Inspired by nature, chemists also implement controlling elements into the material design; for this purpose, adjustable structural units with properties controlled by a suitable stimulus are introduced to a responsive molecule. The respective molecular architectures that respond to external stimuli and alter their function are often referred to as smart materials, and mechanical action can be an attractive possibility to regulate properties of various materials.

In contrast to photochemical activation, the mechanical one can be achieved at dark and in nontransparent reaction mixtures. Moreover, its application does not require ferromagnetic components, as in the case of magnetically responsive materials. As opposed to the chemical triggers, the mechanical activation is noninvasive, noncumulative, and can be orthogonal to the reaction of interest. Furthermore, the mechanochemical transformation can be achieved in solid, is directional and regulated by the local molecular structure. This can lead to unusual molecular configurations and excitation states not accessible in solutions under convectional heating, irradiation, or electrical current. Last but not least, the mechanical activation is easy to achieve with relatively simple instrumentation and operational procedures.

For these reasons, elaboration and application of new mechanically responsive molecules, their aggregates, and related smart materials have become the focus of much attention, and this Special Issue is an attempt to provide a common ground for researches involved in the development of new materials receptive to mechanical stimuli. The application of such materials is limited only by our imagination, and it already involves enzyme mimics and modulation of reaction outcome, mechanoresponsive polymers and mechanosensitive channels, smart drug delivery and release, self-healing coatings, piezo- and triboelectric nanogenerators, to name but a few developments.

Prof. Dr. Elisabete C.B.A. Alegria
Dr. Maximilian N. Kopylovich
Guest Editors

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 papers will be 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. Molecules 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 1800 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

  • Mechanically responsive molecules
  • Stimuli-responsive materials
  • Dynamic molecular tuning
  • Smart materials
  • Dynamic catalysis
  • Smart drug delivery and release
  • Self-healing coatings
  • Mechanoresponsive polymers
  • Mechanosensitive channels
  • Piezoelectric materials
  • Triboelectric materials

Published Papers (1 paper)

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Research

Open AccessArticle
‘Seeing’ Strain in Soft Materials
Molecules 2019, 24(3), 542; https://doi.org/10.3390/molecules24030542
Received: 14 January 2019 / Revised: 29 January 2019 / Accepted: 30 January 2019 / Published: 1 February 2019
PDF Full-text (2770 KB) | HTML Full-text | XML Full-text | Supplementary Files
Abstract
Several technologies can be used for measuring strains of soft materials under high rate impact conditions. These technologies include high speed tensile test, split Hopkinson pressure bar test, digital image correlation and high speed X-ray imaging. However, none of these existing technologies can [...] Read more.
Several technologies can be used for measuring strains of soft materials under high rate impact conditions. These technologies include high speed tensile test, split Hopkinson pressure bar test, digital image correlation and high speed X-ray imaging. However, none of these existing technologies can produce a continuous 3D spatial strain distribution in the test specimen. Here we report a novel passive strain sensor based on poly(dimethyl siloxane) (PDMS) elastomer with covalently incorporated spiropyran (SP) mechanophore to measure impact induced strains. We have shown that the incorporation of SP into PDMS at 0.25 wt% level can adequately measure impact strains via color change under a high strain rate of 1500 s−1 within a fraction of a millisecond. Further, the color change is fully reversible and thus can be used repeatedly. This technology has a high potential to be used for quantifying brain strain for traumatic brain injury applications. Full article
(This article belongs to the Special Issue Mechanically Responsive Materials and Their Applications)
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