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Recent Advances in Luminescent Materials
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Recent Advances in Luminescent Materials

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

Deadline for manuscript submissions: closed (31 December 2021) | Viewed by 6090

Special Issue Editor

Dr. Fabio Rizzo

E-Mail Website
Guest Editor
1. Institute of Chemical Science and Technologies (SCITEC), National Research Council (CNR), via G. Fantoli 16/15, 20138 Milano, Italy
2. Organic Chemistry Institute and Center for Soft Nanoscience (SoN), Westfälische Wilhelms-Universität Münster, Busso-Peus-Straße 10, 48149 Münster, Germany
Interests: organic dyes; fluorescence spectroscopy; dyes for electrochemiluminescence; proteins detection; lanthanide complexes; funtional surfaces; organic electronics; bioimaging; materials science

Special Issue Information

Dear Colleagues,

Owing to their specific physico-chemical properties, luminescent materials are key elements for the development of technological and social features of our society. These materials play a pivotal role in various applications, such as optoelectronics, analytics, and medical and biological research. The enormous progress achieved in the field of light-emitting diodes (LEDs), organic photovoltaics, and fluorescent probes for diagnostics gives an idea of the impact and the multidisciplinary approach of the research area of luminescent materials. Besides accurate molecular design for single molecules and supramolecular systems, photophysical analysis is a fundamental tool for the investigation of emission properties, allowing for the progress of novel advanced emitting materials.

This Special Issue titled “Recent Advances in Luminescent Materials” aims to stimulate the publication of high-quality research articles, as well as focus reviews, that seek to address recent achievements in the preparation, characterization, and application of luminescent materials, and exciting new developments in related areas, including future prospects and technological challenges.

Dr. Fabio Rizzo
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
  • photonic materials
  • nanophotonics
  • solar cells
  • optical display
  • optical sensors
  • phosphorescence
  • OLED
  • TADF
  • luminescent complexes
  • bioimaging
  • molecular sensors
  • organic dyes
  • proteins detection
  • electroluminescence
  • energy transfer
  • aggregation-induced emission
  • room-temperature phosphorescence
  • luminescent solar concentrators
  • self-assembly
  • supramolecular chemistry
  • dyes and pigments

Published Papers (2 papers)

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Research

23 pages, 6152 KiB  
Article
Stealth Luminescent Organic Nanoparticles Made from Quadrupolar Dyes for Two-Photon Bioimaging: Effect of End-Groups and Core
by Morgane Rosendale, Jonathan Daniel, Frédéric Castet, Paolo Pagano, Jean-Baptiste Verlhac and Mireille Blanchard-Desce
Molecules 2022, 27(7), 2230; https://0-doi-org.brum.beds.ac.uk/10.3390/molecules27072230 - 29 Mar 2022
Viewed by 1814
Abstract
Molecular-based Fluorescent Organic Nanoparticles (FONs) are versatile light-emitting nano-tools whose properties can be rationally addressed by bottom-up molecular engineering. A challenging property to gain control over is the interaction of the FONs’ surface with biological systems. Indeed, most types of nanoparticles tend to [...] Read more.
Molecular-based Fluorescent Organic Nanoparticles (FONs) are versatile light-emitting nano-tools whose properties can be rationally addressed by bottom-up molecular engineering. A challenging property to gain control over is the interaction of the FONs’ surface with biological systems. Indeed, most types of nanoparticles tend to interact with biological membranes. To address this limitation, we recently reported on two-photon (2P) absorbing, red to near infrared (NIR) emitting quadrupolar extended dyes built from a benzothiadiazole core and diphenylamino endgroups that yield spontaneously stealth FONs. In this paper, we expand our understanding of the structure-property relationship between the dye structure and the FONs 2P absorption response, fluorescence and stealthiness by characterizing a dye-related series of FONs. We observe that increasing the strength of the donor end-groups or of the core acceptor in the quadrupolar (D-π-A-π-D) dye structure allows for the tuning of optical properties, notably red-shifting both the emission (from red to NIR) and 2P absorption spectra while inducing a decrease in their fluorescence quantum yield. Thanks to their strong 1P and 2P absorption, all FONs whose median size varies between 11 and 28 nm exhibit giant 1P (106 M−1.cm−1) and 2P (104 GM) brightness values. Interestingly, all FONs were found to be non-toxic, exhibit stealth behaviour, and show vanishing non-specific interactions with cell membranes. We postulate that the strong hydrophobic character and the rigidity of the FONs building blocks are crucial to controlling the stealth nano-bio interface. Full article
(This article belongs to the Special Issue Recent Advances in Luminescent Materials)
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17 pages, 5653 KiB  
Article
Highly Efficient Candlelight Organic Light-Emitting Diode with a Very Low Color Temperature
by Shahnawaz, Iram Siddiqui, Mangey Ram Nagar, Abhijeet Choudhury, Jin-Tin Lin, Dovydas Blazevicius, Gintare Krucaite, Saulius Grigalevicius and Jwo-Huei Jou
Molecules 2021, 26(24), 7558; https://0-doi-org.brum.beds.ac.uk/10.3390/molecules26247558 - 13 Dec 2021
Cited by 6 | Viewed by 3538
Abstract
Low color temperature candlelight organic light-emitting diodes (LEDs) are human and environmentally friendly because of the absence of blue emission that might suppress at night the secretion of melatonin and damage retina upon long exposure. Herein, we demonstrated a lighting device incorporating a [...] Read more.
Low color temperature candlelight organic light-emitting diodes (LEDs) are human and environmentally friendly because of the absence of blue emission that might suppress at night the secretion of melatonin and damage retina upon long exposure. Herein, we demonstrated a lighting device incorporating a phenoxazine-based host material, 3,3-bis(phenoxazin-10-ylmethyl)oxetane (BPMO), with the use of orange-red and yellow phosphorescent dyes to mimic candlelight. The resultant BPMO-based simple structured candlelight organic LED device permitted a maximum exposure limit of 57,700 s, much longer than did a candle (2750 s) or an incandescent bulb (1100 s) at 100 lx. The resulting device showed a color temperature of 1690 K, which is significantly much lower than that of oil lamps (1800 K), candles (1900 K), or incandescent bulbs (2500 K). The device showed a melatonin suppression sensitivity of 1.33%, upon exposure for 1.5 h at night, which is 66% and 88% less than the candle and incandescent bulb, respectively. Its maximum power efficacy is 23.1 lm/W, current efficacy 22.4 cd/A, and external quantum efficiency 10.2%, all much higher than the CBP-based devices. These results encourage a scalable synthesis of novel host materials to design and manufacture high-efficiency candlelight organic LEDs. Full article
(This article belongs to the Special Issue Recent Advances in Luminescent Materials)
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