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Explorations in Luminescent Molecular Materials
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Explorations in Luminescent Molecular Materials

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

Deadline for manuscript submissions: 31 March 2025 | Viewed by 3061

Special Issue Editor

Prof. Dr. Ángeles Farrán Morales

E-Mail Website
Guest Editor
Departamento de Química Orgánica y Bio-Orgánica, Facultad de Ciencias, Universidad Nacional de Educación a Distancia, Paseo Senda del Rey 4, 28040 Madrid, Spain
Interests: photophysics; photochemistry; supramolecular chemistry; heterocyclic chemistry

Special Issue Information

Dear Colleagues,

I am Angeles Farrán, Guest Editor of a Special Issue dedicated to luminescent molecular materials. I am writing to invite you to contribute to this Special Issue of Molecules (CiteScore: 6.7/ Impact Factor: 4.6).

Luminescent molecular materials are capable of emitting light in the form of fluorescence or phosphorescence upon an external stimulus such as light or heat. These materials have been applied in various fields, such as sensors, molecular imaging, and optoelectronics, among others. These materials can be inorganic or organic and have received significant attention from the scientific community. Among them, we can find molecules that exhibit changes in luminescence upon an external stimuli and are often used as sensors for metal ions, anions, and organic molecules. Furthermore, luminescent materials are employed in the development of organic light-emitting diodes (LEDs), lasers, and photovoltaic cells. Organic dyes and conjugated polymers are also important electroluminescent materials that have been associated with biological imaging techniques. This research field is dynamic and many emerging luminescent materials are currently being reported, especially organic perovskite quantum dots (QDs), rare-earth fluoride nanocrystals, and colloidal carbon dots. This Special Issue will be dedicated to original and innovative contributions in this promising field. 

Prof. Dr. Ángeles Farrán Morales
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

  • fluorescence
  • phosphorescence
  • luminescent materials
  • organic dyes
  • electroluminescent materials
  • carbon dots
  • quantum dots

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Published Papers (3 papers)

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Research

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14 pages, 4147 KiB  
Article
Bis(tricyclic) Aromatic Enes That Exhibit Efficient Fluorescence in the Solid State
by Masaki Shimizu, Kenta Nishimura, Mizuki Mineyama, Rin Terao, Tsuneaki Sakurai and Hiroshi Sakaguchi
Molecules 2024, 29(22), 5361; https://doi.org/10.3390/molecules29225361 - 14 Nov 2024
Viewed by 365
Abstract
We report herein that bis(tricyclic) aromatic enes (BAEs) consisting of 6-6-6-membered frameworks such as acridine, xanthene, thioxanthene, and thioxanthene-S,S-dioxide act as a new class of organic luminophores that exhibit blue-to-green fluorescence in the solid state and in polymer film [...] Read more.
We report herein that bis(tricyclic) aromatic enes (BAEs) consisting of 6-6-6-membered frameworks such as acridine, xanthene, thioxanthene, and thioxanthene-S,S-dioxide act as a new class of organic luminophores that exhibit blue-to-green fluorescence in the solid state and in polymer film with good to excellent quantum yields. The BAEs were prepared by the palladium-catalyzed double cross-coupling reaction of phenazastannines or 10,10-dimethyl-10H-phenothiastannin with 9-(dibromomethylene)xanthene, 9-(dibromomethylene)thioxanthene, or 9-(dibromomethylene)-9H-thioxanthene-10,10-dioxide. Microcrystals or powder samples of the BAEs exhibited brilliant fluorescence with good to high quantum yields (Φ = 0.45–0.88). Furthermore, more efficient emission of blue-to-green light (Φ = 0.59–0.91) was observed for the BAEs dispersed in the poly(methyl methacrylate) (PMMA) films. Density functional theory (DFT) calculations suggest that the photo-absorption of the (thio)xanthene moiety-containing BAEs proceeds via π–π* transitions, whereas the optical excitation of 10,10-dioxido-9H-thioxanthene moiety-containing BAEs involves an intramolecular charge transfer from the acridine/thioxanthene part to the electron-accepting 10,10-dioxido-9H-thioxanthene moiety. Full article
(This article belongs to the Special Issue Explorations in Luminescent Molecular Materials)
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13 pages, 5596 KiB  
Article
The Effect of Molecular Structure on the Properties of Fluorene Derivatives for OLED Applications
by Anna Pidluzhna, Aivars Vembris, Raitis Grzibovskis, Margarita Anna Zommere, Oleksandr Bezvikonnyi, Jurate Simokaitiene, Melita Baronaite, Dmytro Volyniuk, Juozas V. Grazulevicius, Amjad Ali, Glib Baryshnikov, Khrystyna Ivaniuk, Hryhorii Starykov and Pavlo Stakhira
Molecules 2024, 29(20), 4918; https://doi.org/10.3390/molecules29204918 - 17 Oct 2024
Viewed by 899
Abstract
A new family of symmetrical fluorene derivatives with different types of substituents attached to the C-2 and C-7 positions of the fluorene core synthesized by the Sonogashira coupling reactions is reported. The electronic structures and the properties of the compounds investigated by means [...] Read more.
A new family of symmetrical fluorene derivatives with different types of substituents attached to the C-2 and C-7 positions of the fluorene core synthesized by the Sonogashira coupling reactions is reported. The electronic structures and the properties of the compounds investigated by means of photoelectron emission spectroscopy, UV–Vis absorption and photoluminescent spectroscopy as well as by DFT and TD-DFT theoretical calculations are discussed. It is shown that the nature of substituents influences the π-conjugation of the molecules. No intermolecular charge transfer within the investigated wavelength range is observed. The applicability of the synthesized compounds in organic light-emitting diodes (OLEDs) based on exciplex emission is demonstrated. The advanced co-deposition technique with the tuned OLED architecture was applied and resulted in improved OLED parameters. Full article
(This article belongs to the Special Issue Explorations in Luminescent Molecular Materials)
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Review

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21 pages, 5468 KiB  
Review
Fluorescent Materials Based on Spiropyran for Advanced Anti-Counterfeiting and Information Encryption
by Sha Ding, Xin Lv, Yong Xia and Yuejun Liu
Molecules 2024, 29(11), 2536; https://doi.org/10.3390/molecules29112536 - 28 May 2024
Cited by 1 | Viewed by 1445
Abstract
In daily life, counterfeit and substandard products, particularly currency, medicine, food, and confidential documents, are capable of bringing about very serious consequences. The development of anti-counterfeiting and authentication technologies with multilevel securities is a powerful means to overcome this challenge. Among various anti-counterfeiting [...] Read more.
In daily life, counterfeit and substandard products, particularly currency, medicine, food, and confidential documents, are capable of bringing about very serious consequences. The development of anti-counterfeiting and authentication technologies with multilevel securities is a powerful means to overcome this challenge. Among various anti-counterfeiting technologies, fluorescent anti-counterfeiting technology is well-known and commonly used to fight counterfeiters due to its wide material source, low cost, simple usage, good concealment, and simple response mechanism. Spiropyran is favored by scientists in the fields of anti-counterfeiting and information encryption due to its reversible photochromic property. Here, we summarize the current available spiropyran-based fluorescent materials from design to anti-counterfeiting applications. This review will be help scientists to design and develop fluorescent anti-counterfeiting materials with high security, high performance, quick response, and high anti-counterfeiting level. Full article
(This article belongs to the Special Issue Explorations in Luminescent Molecular Materials)
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