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Synthesis and Properties of Luminescent Materials
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Synthesis and Properties of Luminescent Materials

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

Deadline for manuscript submissions: closed (30 September 2023) | Viewed by 5176

Special Issue Editor

Dr. Jiaren Du

E-Mail Website
Guest Editor
School of Chemical and Material Engineering, Jiangnan University, Wuxi, China
Interests: persistent luminescence; transition metal/rare-earth spectroscopy; thermoluminescence; luminescent phosphor; photochromism
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Luminescent materials have been well established for traditional solid-state lighting and display applications and will continue to have a significant technological role for humankind in many fields, such as light emitters for flexible displays, radiation exposure monitoring, security inspection, and medical imaging. A wide range of materials, properties, and applications are of current interest, including inorganic light-emitting diode materials and devices, up-conversion luminescence, X-ray excited luminescence, optically, mechanically, and thermally stimulated luminescence, nanomaterials, and powder phosphor materials and devices. This Special Issue on “Synthesis and Properties of Luminescent Materials” aims at inorganic and hybrid organic–inorganic materials that have luminescent properties and is open to research that deals with synthesis methods, structural characterizations, luminescence properties, and their applications. The intention is to focus on their latest developments on these novel luminescent properties and their preparation methods. Contributions as reviews or original papers on basic research or applied technology of promising luminescent materials are welcomed.

The scope of the Special Issue includes, but is not limited to, the following topics:

  • Rare-earth/transition metal-doped materials;
  • Phosphors: recent progress, new materials, and applications;
  • X-ray excited luminescence, optically, mechanically, and thermally stimulated luminescence;
  • Novel optical materials, devices for displays, sensing, biomedical, and environmental applications;
  • New synthesis methods and techniques;
  • Experimental methods for characterizing luminescent materials;
  • Applications of luminescent materials.

Dr. Jiaren Du
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

  • luminescence
  • synthesis
  • inorganic materials
  • phosphor
  • display
  • persistent luminescence
  • up-conversion
  • LEDs

Published Papers (3 papers)

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Research

9 pages, 3692 KiB  
Communication
Improving the Luminescence and Stability of Carbon-Centered Radicals by Kinetic Isotope Effect
by Zhichao Ma, Lintao Zhang, Zhiyuan Cui and Xin Ai
Molecules 2023, 28(12), 4805; https://doi.org/10.3390/molecules28124805 - 16 Jun 2023
Viewed by 1417
Abstract
The kinetic isotope effect (KIE) is beneficial to improve the performance of luminescent molecules and relevant light-emitting diodes. In this work, the influences of deuteration on the photophysical property and stability of luminescent radicals are investigated for the first time. Four deuterated radicals [...] Read more.
The kinetic isotope effect (KIE) is beneficial to improve the performance of luminescent molecules and relevant light-emitting diodes. In this work, the influences of deuteration on the photophysical property and stability of luminescent radicals are investigated for the first time. Four deuterated radicals based on biphenylmethyl, triphenylmethyl, and deuterated carbazole were synthesized and sufficiently characterized. The deuterated radicals exhibited excellent redox stability, as well as improved thermal and photostability. The appropriate deuteration of relevant C-H bonds would effectively suppress the non-radiative process, resulting in the increase in photoluminescence quantum efficiency (PLQE). This research has demonstrated that the introduction of deuterium atoms could be an effective pathway to develop high-performance luminescent radicals. Full article
(This article belongs to the Special Issue Synthesis and Properties of Luminescent Materials)
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16 pages, 3682 KiB  
Article
Comparative Study for Spectrofluorimetric Determination of Ambroxol Hydrochloride Using Aluminum Metal Transfer Chelation Complex and Biogenic Synthesis of Aluminum Oxide Nanoparticles Using Lavandula spica Flowers Extract
by Najla S. Al-Humud, Salma A. Al-Tamimi, Amal M. Al-Mohaimeed and Maha F. El-Tohamy
Molecules 2023, 28(5), 2210; https://doi.org/10.3390/molecules28052210 - 27 Feb 2023
Cited by 2 | Viewed by 1596
Abstract
The existing study pronounces two newly developed spectrofluorimetric probes for the assay of ambroxol hydrochloride in its authentic and commercial formulations using an aluminum chelating complex and a biogenically mediated and synthesized aluminum oxide nanoparticles (Al2O3NPs) from Lavandula spica [...] Read more.
The existing study pronounces two newly developed spectrofluorimetric probes for the assay of ambroxol hydrochloride in its authentic and commercial formulations using an aluminum chelating complex and a biogenically mediated and synthesized aluminum oxide nanoparticles (Al2O3NPs) from Lavandula spica flower extract. The first probe is based on the formation of an aluminum charge transfer complex. However, the second probe is based on the effect of the unique optical characteristics of Al2O3NPs in the enhancement of fluorescence detection. The biogenically synthesized Al2O3NPs were confirmed using various spectroscopic and microscopic investigations. The fluorescence detections in the two probes were measured at a λex of 260 and 244 and a λem of 460 and 369 nm for the two suggested probes, respectively. The findings showed that the fluorescence intensity (FI) covered linear concentration ranges of 0.1–200 ng mL−1 and 1.0–100 ng mL−1 with a regression of ˃0.999 for AMH-Al2O3NPs-SDS and AMH-Al(NO3)3-SDS, respectively. The lower detection and quantification limits were evaluated and found to be 0.04 and 0.1 ng mL−1 and 0.7 and 0.1 ng/mL−1 for the abovementioned fluorescence probes, respectively. The two suggested probes were successfully applied for the assay of ambroxol hydrochloride (AMH) with excellent percentage recoveries of 99.65% and 99.85%, respectively. Excipients such as glycerol and benzoic acid used as additives in pharmaceutical preparations, several common cations, and amino acids, as well as sugars, were all found to have no interference with the approach. Full article
(This article belongs to the Special Issue Synthesis and Properties of Luminescent Materials)
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20 pages, 4399 KiB  
Article
Push-Pull Effect of Terpyridine Substituted by Triphenylamine Motive—Impact of Viscosity, Polarity and Protonation on Molecular Optical Properties
by Anna Maria Maroń, Oliviero Cannelli, Etienne Christophe Socie, Piotr Lodowski and Barbara Machura
Molecules 2022, 27(20), 7071; https://doi.org/10.3390/molecules27207071 - 20 Oct 2022
Cited by 3 | Viewed by 1737
Abstract
The introduction of an electron-donating triphenylamine motive into a 2,2′,6′,2′′-terpyridine (terpy) moiety, a cornerstone molecular unit in coordination chemistry, opens new ways for a rational design of photophysical properties of organic and inorganic compounds. A push-pull compound, 4′-(4-(di(4-tert-butylphenyl)amine)phenyl)-2,2′,6′,2′′-terpyridine (tBuTPAterpy), was thoroughly investigated with [...] Read more.
The introduction of an electron-donating triphenylamine motive into a 2,2′,6′,2′′-terpyridine (terpy) moiety, a cornerstone molecular unit in coordination chemistry, opens new ways for a rational design of photophysical properties of organic and inorganic compounds. A push-pull compound, 4′-(4-(di(4-tert-butylphenyl)amine)phenyl)-2,2′,6′,2′′-terpyridine (tBuTPAterpy), was thoroughly investigated with the use of steady-state and time-resolved spectroscopies and Density Functional Theory (DFT) calculations. Our results demonstrate that solvent parameters have an enormous influence on the optical properties of this molecule, acting as knobs for external control of its photophysics. The Intramolecular Charge Transfer (ICT) process introduces a remarkable solvent polarity effect on the emission spectra without affecting the lowest absorption band, as confirmed by DFT simulations, including solvation effects. The calculations ascribe the lowest absorption transitions to two singlet ICT excited states, S1 and S2, with S1 having several orders of magnitude higher oscillator strength than the “dark” S2 state. Temperature and viscosity investigations suggest the existence of two emitting excited states with different structural conformations. The phosphorescence emission band observed at 77 K is assigned to a localized 3terpy state. Finally, protonation studies show that tBuTPAterpy undergoes a reversible process, making it a promising probe of the pH level in the context of acidity determination. Full article
(This article belongs to the Special Issue Synthesis and Properties of Luminescent Materials)
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