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Special Issue "New Molecular Materials"

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

Deadline for manuscript submissions: closed (30 May 2016)

Special Issue Editor

Guest Editor
Dr. J.A.A.W. Elemans

Radboud University, Institute for Molecules and Materials, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands
Website | E-Mail
Interests: self-assembly; supramolecular chemistry; molecular materials; surfaces; catalysis; molecular recognition; scanning probe microscopy; solid-liquid interfaces

Special Issue Information

Dear Colleagues,

Molecular materials enrich daily life in many ways. Based on rational synthetic design and a precise and controlled ordering of molecular and macromolecular building blocks, well-defined (nano)structured materials can be constructed with sophisticated mechanical, optoelectronic, liquid-crystalline, conductive or magnetic properties. This may lead to new generations of functional (bio)materials, such as (hydro)gels and heterogeneous catalysts, and advanced technological devices, such as light-emitting diodes, solar cells, displays, and computer memory. Grand challenges in the development of new molecular materials are to obtain full understanding about structure-function relationships, and the ability to control these relationships over all length scales—from the individual molecular building blocks to the macroscopic device. The aim of this Special Issue, “New Molecular Materials”, is to provide an inspiring platform for the dissemination of the latest developments and discoveries in the design, construction and characterization of molecular materials, and the fundamental understanding between their structure and function.

Dr. J.A.A.W. Elemans
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

  • materials design
  • synthesis
  • self-assembly
  • surfaces
  • structure-function relationships
  • gels
  • liquid crystals
  • optoelectronics
  • photovoltaics
  • memory
  • magnetism
  • nanoscience

Published Papers (4 papers)

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Research

Open AccessArticle Synthesis and Characterization of Magnetic Molecularly Imprinted Polymer for the Enrichment of Ofloxacin Enantiomers in Fish Samples
Molecules 2016, 21(7), 915; doi:10.3390/molecules21070915
Received: 25 May 2016 / Revised: 9 July 2016 / Accepted: 11 July 2016 / Published: 14 July 2016
Cited by 3 | PDF Full-text (3577 KB) | HTML Full-text | XML Full-text
Abstract
A new method for the isolation and enrichment of ofloxacin enantiomers from fish samples was developed using magnetic molecularly imprinted polymers (MMIPs). These polymers can be easily collected and rapidly separated using an external magnetic field, and also exhibit a high specific recognition
[...] Read more.
A new method for the isolation and enrichment of ofloxacin enantiomers from fish samples was developed using magnetic molecularly imprinted polymers (MMIPs). These polymers can be easily collected and rapidly separated using an external magnetic field, and also exhibit a high specific recognition for ofloxacin enantiomers. The preparation of amino-functionalized MMIPs was carried out via suspension polymerization and a ring-opening reaction using rac-ofloxacin as a template, ethylenediamine as an active group, glycidyl methacrylate and methyl methacrylate as functional monomers, divinylbenzene as a cross-linker, and Fe3O4 nanoparticles as magnetic cores. The characteristics of the MMIPs were assessed using transmission electron microscopy (TEM), X-ray powder diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), and vibrating sample magnetometer (VSM) measurements. Furthermore, the adsorption properties were determined using Langmuir and Freundlich isotherm models. The conditions for use of these MMIPs as magnetic solid-phase extraction (MSPE) sorbents, including pH, adsorption time, desorption time, and eluent, were investigated in detail. An extraction method using MMIPs coupled with high performance liquid chromatography (HPLC) was developed for the determination of ofloxacin enantiomers in fish samples. The limits of quantitation (LOQ) for the developed method were 0.059 and 0.067 μg∙mL−1 for levofloxacin and dextrofloxacin, respectively. The recovery of ofloxacin enantiomers ranged from 79.2% ± 5.6% to 84.4% ± 4.6% and ofloxacin enantiomers had good linear relationships within the concentration range of 0.25–5.0 μg∙mL−1 (R2 > 0.999). The obtained results demonstrate that MSPE-HPLC is a promising approach for preconcentration, purification, and simultaneous separation of ofloxacin enantiomers in biomatrix samples. Full article
(This article belongs to the Special Issue New Molecular Materials)
Open AccessArticle Using Low Temperature Photoluminescence Spectroscopy to Investigate CH3NH3PbI3 Hybrid Perovskite Degradation
Molecules 2016, 21(7), 885; doi:10.3390/molecules21070885
Received: 25 May 2016 / Revised: 29 June 2016 / Accepted: 30 June 2016 / Published: 8 July 2016
Cited by 3 | PDF Full-text (6454 KB) | HTML Full-text | XML Full-text
Abstract
Investigating the stability and evaluating the quality of the CH3NH3PbI3 perovskite structures is quite critical both to the design and fabrication of high-performance perovskite devices and to fundamental studies of the photophysics of the excitons. In particular, it
[...] Read more.
Investigating the stability and evaluating the quality of the CH3NH3PbI3 perovskite structures is quite critical both to the design and fabrication of high-performance perovskite devices and to fundamental studies of the photophysics of the excitons. In particular, it is known that, under ambient conditions, CH3NH3PbI3 degrades producing some PbI2. We show here that low temperature Photoluminescence (PL) spectroscopy is a powerful tool to detect PbI2 traces in hybrid perovskite layers and single crystals. Because PL spectroscopy is a signal detection method on a black background, small PbI2 traces can be detected, when other methods currently used at room temperature fail. Our study highlights the extremely high stability of the single crystals compared to the thin layers and defects and grain boundaries are thought to play an important role in the degradation mechanism. Full article
(This article belongs to the Special Issue New Molecular Materials)
Open AccessArticle Tandem Catalysis of an Aldol-‘Click’ Reaction System within a Molecular Hydrogel
Molecules 2016, 21(6), 744; doi:10.3390/molecules21060744
Received: 26 April 2016 / Revised: 2 June 2016 / Accepted: 3 June 2016 / Published: 8 June 2016
Cited by 1 | PDF Full-text (2418 KB) | HTML Full-text | XML Full-text | Supplementary Files
Abstract
A heterogeneous supramolecular catalytic system for multicomponent aldol-‘click’ reactions is reported. The copper(I) metallohydrogel functionalized with a phenyltriazole fragment was able to catalyze the multicomponent reaction between phenylacetylene, p-nitrobenzaldehyde, and an azide containing a ketone moiety, obtaining the corresponding aldol products in
[...] Read more.
A heterogeneous supramolecular catalytic system for multicomponent aldol-‘click’ reactions is reported. The copper(I) metallohydrogel functionalized with a phenyltriazole fragment was able to catalyze the multicomponent reaction between phenylacetylene, p-nitrobenzaldehyde, and an azide containing a ketone moiety, obtaining the corresponding aldol products in good yields. A possible mechanistic pathway responsible for this unexpected catalytic behavior has been proposed. Full article
(This article belongs to the Special Issue New Molecular Materials)
Open AccessArticle Synthesis of Ethano-Bridged Diazapolycenes as Potential Precursors for Diazapolycenes and Their Properties
Molecules 2016, 21(4), 407; doi:10.3390/molecules21040407
Received: 4 February 2016 / Revised: 15 March 2016 / Accepted: 19 March 2016 / Published: 25 March 2016
Cited by 1 | PDF Full-text (1232 KB) | HTML Full-text | XML Full-text
Abstract
A series of ethanodiazapolycenes were prepared in 87%–89% yields by Friedländer reactions of three o-aminoarenecarbaldehydes with bicyclo[2.2.2]octane-2,5-dione and their spectral, thermal, and structural properties were studied. Subsequent attempts to convert them to diazapolycenes have proved unsuccessful. Full article
(This article belongs to the Special Issue New Molecular Materials)
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