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Special Issue "Trityl Radicals: Synthesis, Properties and Applications"

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

Deadline for manuscript submissions: 31 October 2018

Special Issue Editor

Guest Editor
Prof. Dr. Olav Schiemann

Institute of Physical and Theoretical Chemistry, University of Bonn, Bonn, Germany
Website | E-Mail
Interests: EPR; Pulsed Dipolar Spectroscopy; Oligonucleotides; Proteins; Spinlabels

Special Issue Information

Dear Colleagues,

The chemistry and use of closed-shell organic molecules is well developed. In contrast, the usually high reactivity and transient nature of open-shell organic radicals has hampered the development of their chemistry and applications. During the last years, a particular type of radicals, the trityl radicals, have attracted a lot of attention. Their parent compound is the Gomberg radical, which can be derivatized in several ways and thereby tailored with respect to the envisioned application. These applications include the use of the derivatives as Molecular Magnets and Spin Labels, as well as in Spintronics, Dynamic Nuclear Polarization, Imaging, Sensoring, and EPR-based Distance Measurements in vitro, within cells, and at room temperature. The aim of this Special Issue is to cover all these facets of the trityl radicals, thereby giving the reader the opportunity to obtain an overview of the field within one journal issue. For the authors, this Special Issue represents an opportunity to make their research in this field more visible.

This Special Issue will contain contributions discussing all the aspects broadly indicated by the keywords. Review articles by experts in the field will also be welcome.

Prof. Dr. Olav Olav Schiemann
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 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 monthly 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

  • Trityl Radicals
  • Synthesis
  • Dynamic Nuclear Polarization
  • NMR/EPR Imaging
  • Molecular Magnetism
  • EPR
  • Distance Measurements
  • Sensing
  • Spintronics

Published Papers (1 paper)

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Research

Open AccessArticle Verdazyls as Possible Building Blocks for Multifunctional Molecular Materials: A Case Study on 1,5-Diphenyl-3-(p-iodophenyl)-verdazyl Focusing on Magnetism, Electron Transfer and the Applicability of the Sonogashira-Hagihara Reaction
Molecules 2018, 23(7), 1758; https://doi.org/10.3390/molecules23071758
Received: 28 June 2018 / Revised: 15 July 2018 / Accepted: 16 July 2018 / Published: 18 July 2018
PDF Full-text (3491 KB) | HTML Full-text | XML Full-text | Supplementary Files
Abstract
This work explores the use of Kuhn verdazyl radicals as building blocks in multifunctional molecular materials in an exemplary study, focusing on the magnetic and the electron transfer (ET) characteristics, but also addressing the question whether chemical modification by cross-coupling is possible. The
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This work explores the use of Kuhn verdazyl radicals as building blocks in multifunctional molecular materials in an exemplary study, focusing on the magnetic and the electron transfer (ET) characteristics, but also addressing the question whether chemical modification by cross-coupling is possible. The ET in solution is studied spectroscopically, whereas solid state measurements afford information about the magnetic susceptibility or the conductivity of the given samples. The observed results are rationalized based on the chemical structures of the molecules, which have been obtained by X-ray crystallography. The crystallographically observed molecular structures as well as the interpretation based on the spectroscopic and physical measurements are backed up by DFT calculations. The measurements indicate that only weak, antiferromagnetic (AF) coupling is observed in Kuhn verdazyls owed to the low tendency to form face-to-face stacks, but also that steric reasons alone are not sufficient to explain this behavior. Furthermore, it is also demonstrated that ET reactions proceed rapidly in verdazyl/verdazylium redox couples and that Kuhn verdazyls are suited as donor molecules in ET reactions. Full article
(This article belongs to the Special Issue Trityl Radicals: Synthesis, Properties and Applications)
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