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Molecules
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Research on the Synthesis and Functionalization of Supramolecular Complexes
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Research on the Synthesis and Functionalization of Supramolecular Complexes

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

Deadline for manuscript submissions: closed (30 November 2020) | Viewed by 3796

Special Issue Editor

Prof. Dr. Hiroyasu Yamaguchi

E-Mail Website
Guest Editor
Department of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
Interests: supramolecular complexes; molecular recognition; hybrid catalysts; sensors; stimuli-responsive materials

Special Issue Information

Dear Colleagues,

Supramolecular chemistry and self-assembly have long been recognized as major pillars in understanding the organization of chemical and biological components that are beyond molecules. The development of supramolecular polymers over the last few decades has largely gone hand-in-hand with progress relating to the synthesis and characterization of new efficient and stimuli-responsive supramolecular building blocks. Supramolecular complexes have a range of applications, which concern advanced materials, medicine, and catalysis. In this Special Issue, we invite submissions focusing on new developments relating to the synthesis, self-assembly, and function of supramolecular complexes.

Prof. Dr. Hiroyasu Yamaguchi
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. 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 2700 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

  • Functional supramolecular complexes
  • Supramolecular polymers
  • Supramolecular catalysts
  • Stimuli-responsive materials
  • Self-assembly
  • Self-organization
  • Hybrid materials
  • Molecular interactions
  • Molecular recognition
  • Noncovalent bond
  • Coordination chemistry
  • Hydrogen bond
  • Ionic bond
  • Sensors (detection method/detection element)
  • Separation

Published Papers (2 papers)

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Research

13 pages, 2144 KiB  
Article
How the Supramolecular Nature of Lignohumate Affects Its Diffusion in Agarose Hydrogel
by Martina Klučáková, Michal Kalina and Vojtěch Enev
Molecules 2020, 25(24), 5831; https://doi.org/10.3390/molecules25245831 - 10 Dec 2020
Cited by 2 | Viewed by 1806
Abstract
Lignohumate, as an industrially produced analog of natural humic substances, is studied from the point of view of its diffusion properties. This work focuses on its permeation ability, important in agricultural and horticultural applications, connected with its penetration into plant organs as leaves [...] Read more.
Lignohumate, as an industrially produced analog of natural humic substances, is studied from the point of view of its diffusion properties. This work focuses on its permeation ability, important in agricultural and horticultural applications, connected with its penetration into plant organs as leaves and roots. The hydrogel based on agarose was used as a model material for the diffusion of lignohumate. Two types of experiments were realized: the diffusion of lignohumate in the hydrogel diffusion couple and the diffusion of lignohumate from its solution into hydrogel. The diffusion coefficient of lignohumate in the hydrogel was determined and used for the modelling of the time development of concentration profiles. It was found that the model agrees with experimental data for short times but an accumulation of lignohumate in front of the interface between donor and acceptor hydrogels was observed after several days. The particle size distribution of lignohumate and changes in the E4/E6 ratio used as an indicator of molecular weight of humic substances were determined. The results showed that the supramolecular structure of lignohumate can react sensitively to actual changes in its environs and thus affect their mobility and permeability into different materials. A filtration effect at the interface can be observed as an accompanying phenomenon of the re-arrangement in the lignohumate secondary structure. Full article
(This article belongs to the Special Issue Research on the Synthesis and Functionalization of Supramolecular Complexes)
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11 pages, 3113 KiB  
Article
Stacking Control by Molecular Symmetry of Sterically Protected Phthalocyanines
by Ryota Kudo, Masahiro Sonobe, Yoshiaki Chino, Yu Kitazawa and Mutsumi Kimura
Molecules 2020, 25(23), 5552; https://doi.org/10.3390/molecules25235552 - 26 Nov 2020
Cited by 1 | Viewed by 1681
Abstract
The synthesis and characterization of two phthalocyanine (Pc) structural isomers, 1 and 2, in which four 2,6-di(hexyloxy)phenyl units were attached directly to the 1,8,15,22- or 1,4,15,18-positions of the Pc rings, are described. Both Pcs 1 and 2 exhibited low melting points, i.e., [...] Read more.
The synthesis and characterization of two phthalocyanine (Pc) structural isomers, 1 and 2, in which four 2,6-di(hexyloxy)phenyl units were attached directly to the 1,8,15,22- or 1,4,15,18-positions of the Pc rings, are described. Both Pcs 1 and 2 exhibited low melting points, i.e., 120 and 130 °C respectively, due to the reduction in intermolecular π-π interaction among the Pc rings caused by the steric hindrance of 2,6-dihexyloxybenzene units. The thermal behaviors were investigated with temperature-controlled polarizing optical microscopy, differential scanning calorimetry, powder X-ray diffraction, and absorption spectral analyses. Pc 1, having C4h molecular symmetry, organized into a lamellar structure containing lateral assemblies of Pc rings. In contrast, the other Pc 2 revealed the formation of metastable crystalline phases, including disordered stacks of Pcs due to rapid cooling from a melted liquid. Full article
(This article belongs to the Special Issue Research on the Synthesis and Functionalization of Supramolecular Complexes)
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