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Luminescent Coordination Compounds

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

Deadline for manuscript submissions: closed (15 August 2023) | Viewed by 2395

Special Issue Editors


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Guest Editor
Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences, 3 Lavrentiev Ave., 630090 Novosibirsk, Russia
Interests: nitrogen ligands; metal–organic frameworks; luminescence
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Guest Editor Assistant
Nikolaev Institute of Inorganic Chemistry, 3 Lavrentiev Ave., 630090 Novosibirsk, Russia
Interests: coordination compounds with luminescent heterocyclic ligands; synthesis of organometallic compounds of platinum-group metals; synthesis of heterocylic ligands

Special Issue Information

Dear Colleagues,

Luminescence is an important physical phenomenon, without which the operation and even existence of many electronic devices would be impossible. Coordination compounds include a central ion and ligands (neutral molecules or anions) linked to it by the coordination bonds. By combining metal ions with ligands of different natures, one can tune the luminescent properties of the resulting coordination compounds. Knowledge of the crystal structure of metal complexes makes it possible to study the dependencies of the luminescent properties of compounds on their structure, which is important for the rational synthesis of coordination compounds with desired photophysical properties. Various luminescence mechanisms can be realized in coordination compounds: metal-centered luminescence, as in lanthanide complexes, metal-to-ligand charge transfer (MLCT) and ligand-to-metal (LMCT) charge transfer in transition metal compounds. Intraligand luminescence is also possible, in which the organic ligand is the carrier of luminescent properties, while the metal ion plays a structure-directing role. Of great importance are more complex examples of photophysical properties, such as thermally activated delayed fluorescence (TADF), excitation wavelength-dependent emission, and multi-band emission. In addition to photoluminescence, which occurs under the action of light, electroluminescence and triboluminescence play an important role. In recent years, more and more attention is paid to stimuli-responsive luminescence, when the photophysical properties of the material can be controlled by the external physical or chemical stimuli, such as temperature, pressure, electromagnetic radiation, pH of the medium, or the presence of certain compounds.

The topics of this issue include, but are not limited to:

  • Synthesis and crystal structure of new luminescent metal complexes and coordination polymers;
  • Study of structure–property relationships for the photophysical properties of coordination compounds;
  • Coordination compounds demonstrating solvo- or vaporchromism of luminescence;
  • Stimuli-responsive luminescence of coordination compounds;
  • Sensing applications of luminescent coordination compounds.

Submissions in the form of Research papers, Communications or Reviews are anticipated.

Prof. Dr. Andrei S. Potapov
Guest Editor

Dr. Vladislava V. Matveevskaya
Guest Editor Assistant

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Keywords

  • coordination compounds
  • coordination polymers
  • luminescence
  • lanthanides
  • transition metals
  • electroluminescence
  • triboluminescence
  • luminescent sensing

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Published Papers (1 paper)

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Research

14 pages, 4753 KiB  
Article
Luminescent Properties and Charge Compensator Effects of SrMo0.5W0.5O4:Eu3+ for White Light LEDs
by Li Kong, Hao Sun, Yuhao Nie, Yue Yan, Runze Wang, Qin Ding, Shuang Zhang, Haihui Yu and Guoyan Luan
Molecules 2023, 28(6), 2681; https://doi.org/10.3390/molecules28062681 - 16 Mar 2023
Cited by 40 | Viewed by 1884
Abstract
The high-temperature solid-phase approach was used to synthesize Eu3+-doped SrMo0.5W0.5O4 phosphors, whose morphological structure and luminescence properties were then characterized by XRD, SEM, FT-IR, excitation spectra, emission spectra, and fluorescence decay curves. The results reveal that [...] Read more.
The high-temperature solid-phase approach was used to synthesize Eu3+-doped SrMo0.5W0.5O4 phosphors, whose morphological structure and luminescence properties were then characterized by XRD, SEM, FT-IR, excitation spectra, emission spectra, and fluorescence decay curves. The results reveal that the best phosphor synthesis temperature was 900 °C and that the doping of Eu3+ and charge compensators (K+, Li+, Na+, NH4+) had no effect on the crystal phase change. SrMo0.5W0.5O4:Eu3+ has major excitation peaks at 273 nm, 397 nm, and 464 nm, and a main emission peak at 615 nm, making it a potential red fluorescent material to be used as a down converter in UV LEDs (273 nm and 397 nm) and blue light LEDs (464 nm) to achieve Red emission. The emission spectra of Sr1−yMo0.5W0.5O4:yEu3+(y = 0.005, 0.01, 0.02, 0.05, 0.07) excited at 273 were depicted, with the Eu3+ concentration increasing the luminescence intensity first increases and then decreases, the emission peak intensity of SrMo0.5W0.5O4:Eu3+ achieves its maximum when the doping concentration of Eu3+ is 1%, and the critical transfer distance is calculated as 25.57 Å. When various charge compensators such as K+, Li+, Na+, and NH4+ are added to SrMo0.5W0.5O4:Eu3+, the NH4+ shows the best effect with the optimal doping concentration of 3wt%. The SrMo0.5W0.5O4:Eu3+,NH4+ color coordinate is (0.656,0.343), which is close to that of the ideal red light (0.670,0.333). Full article
(This article belongs to the Special Issue Luminescent Coordination Compounds)
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