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Materials
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Development of Structure and Barrier Properties of Polymer Nanocomposite Films
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Development of Structure and Barrier Properties of Polymer Nanocomposite Films

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Thin Films and Interfaces".

Deadline for manuscript submissions: closed (20 August 2022) | Viewed by 1846

Special Issue Editor

Dr. Nadege Follain

E-Mail Website
Guest Editor
Laboratory PBS UMR 6270 CNRS, University Rouen Normandy, 76000 Rouen, France
Interests: permeation/sorption processes; nanostructured films; multiphase/multilayer polymer materials; nanomaterials; biobased polymers
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue (SI) publishes original research articles, review articles, and short communications regarding the preparation and development of original polymer-based nanomaterials with particular morphology and performance in terms of thermal, mechanical, and transport properties by vapor or gas sorption and water and gas permeation processes. The morphology data can be through hierarchical and multigrade approaches. We aim to present a collection of papers that reflect relationships between the design of nanocomposite films, their morphology, and microstructure with barrier performance.

Articles with a focus on biopolymer-based nanocomposites with layered structures and/or incorporating unusual, grafted, and mixed fillers that may be applied in various fields such as medicine, packaging, automotive, transportation, sports, energy storage, water purification, gas separation, and sensors are of interest. In addition, studies on synthetic polymers that fit the scope of the Special Issue are also welcome.

Dr. Nadege Follain
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

  • permeation/sorption
  • mass transfer
  • nanocomposites
  • multilayers polymer materials
  • hybrid materials
  • (bio)polymeric films

Published Papers (1 paper)

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Research

17 pages, 4167 KiB  
Article
Two Luminescent Iridium Complexes with Phosphorous Ligands and Their Photophysical Comparison in Solution, Solid and Electrospun Fibers: Decreased Aggregation-Caused Emission Quenching by Steric Hindrance
by Chaohui Huang and Bin Li
Materials 2021, 14(18), 5419; https://doi.org/10.3390/ma14185419 - 19 Sep 2021
Cited by 1 | Viewed by 1381
Abstract
In this paper, we prepared two phosphorescent Ir complexes with ligands of 2-phenyl pyridine (ppy), and two phosphorous ligands with large steric hindrance, hoping to allow enough time for the transformation of the highly phosphorescent 3MLLCT (metal-to-ligand-ligand-charge-transfer) excited state. Their large steric [...] Read more.
In this paper, we prepared two phosphorescent Ir complexes with ligands of 2-phenyl pyridine (ppy), and two phosphorous ligands with large steric hindrance, hoping to allow enough time for the transformation of the highly phosphorescent 3MLLCT (metal-to-ligand-ligand-charge-transfer) excited state. Their large steric hindrance minimized the π-π interaction between complex molecules, so that the aggregation-induced phosphorescence emission (AIPE) influence could be minimized. Their single crystals indicated that they took a distorted octahedral coordination mode. Photophysical comparison between these Ir complexes in solution, in the solid state and in electrospun fibers was performed to confirm the realization of limited aggregation-caused quenching (ACQ). The potential surface crossing and energy transfer from 3MLBPECT/3MLBPELppyCT to 3MLppyCT in these Ir complexes were revealed by density functional theory calculation and temperature-dependent emission. It was confirmed that these two phosphorous ligands offered large steric hindrance, which decreased the ACQ effect, allowing the efficient emissive decay of the 3MLppyCT excited state. This is one of the several luminescent Ir complexes with a high emission yield (Φ = 0.27) and long emission lifetime (0.43 μs) in the solid state. Full article
(This article belongs to the Special Issue Development of Structure and Barrier Properties of Polymer Nanocomposite Films)
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