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Reference Module in Chemistry, Molecular Sciences and Chemical Engineering || Application of Luminescence Spectroscopy in New Materials for Solar Energy Utilization
摘要： The most important problems of our age are the search of new energy sources and the ways to decrease the pollution from organic fuels. Solar energy could provide a partial solution to the problem. If luminescent solar concentrators (LSCs) will be applied to the existing and modern buildings a part of the problem could be solved. In the following I describe the principle of LSCs and the ways by which their efficiency can be achieved.
关键词： Luminescence Spectroscopy,Solar Energy,Lanthanides,New Materials,Luminescent Solar Concentrators,Surface Plasmons
更新于2025-09-09 09:28:46
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Tunable luminescence modulation and warm light emission of Zn-MOF (4,4′-bipyridyl and zinc acetate) doped with Eu3+ and Tb3+
摘要： Herein, we describe the synthesis and doping of Zn-MOF (4,4’-bipyridyl and zinc acetate), crystallographic structure, optical properties of heteronuclear coordination polymers with emission in the visible (Eu3+/Tb3+ and Zn-MOF). The MOF presents a linear structure in the form of a nanotube. Density functional theory (DFT) and time dependent-DFT calculations were performed on the ground and excited states of Zn-MOF to provide insight of geometries, frontier molecular orbitals, and singlet and triplet state energies of the polymer. The metal-organic framework was doped with Eu3+ or Tb3+ in different proportions (Eu0.5-nTbn@Zn-MOF, when n= 0.00, 0.05, 0.10, 0.15, …, 0.5). The doped Zn-MOFs exhibit the typical red and green emission corresponding to Eu3+ and Tb3+ ions, respectively, energy transfer from MOF to metal ions takes place (“antenna effect”). It is noteworthy that the emission color of the lanthanides doped Zn-MOFs changes from red to orange-yellow-green depending on the proportion between Eu3+ and Tb3+. These compounds presented a τ ranging from 1.29 to 1.62 and 1.06-1.56 ms for Eu3+ and Tb3+, respectively, and the corresponding absolute quantum yields values range from 38-61%.
关键词： Lanthanides,doped MOF,luminescence,antenna effect
更新于2025-09-09 09:28:46
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Handbook of Ecomaterials || Electrochemical Synthesis of Coordination Compounds of Lanthanides: Effective Luminophores
摘要： The problems of electrochemical synthesis of complex compounds of lanthanides with organic acids are discussed. It was shown that the resulting complex compounds are thermally stable and can be used as effective luminophores.
关键词： Electrochemical synthesis,Luminescence,Lanthanides
更新于2025-09-09 09:28:46
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Critical Considerations on the Clinical Translation of Upconversion Nanoparticles (UCNPs): Recommendations from the European Upconversion Network (COST Action CM1403)
摘要： The unique photoluminescent properties of upconversion nanoparticles (UCNPs) have attracted worldwide research interest and inspired many bioanalytical applications. The anti-Stokes emission with long luminescence lifetimes, narrow and multiple absorption and emission bands, and excellent photostability enable background-free and multiplexed detection in deep tissues. So far, however, in vitro and in vivo applications of UCNPs are restricted to the laboratory use due to safety concerns. Possible harmful effects may originate from the chemical composition but also from the small size of UCNPs. Potential end users must rely on well-founded safety data. Thus, a risk to benefit assessment of the envisioned combined therapeutic and diagnostic (“theranostic”) applications is fundamentally important to bridge the translational gap between laboratory and clinics. The COST Action CM1403 “The European Upconversion Network—From the Design of Photon-Upconverting Nanomaterials to Biomedical Applications” integrates research on UCNPs ranging from fundamental materials synthesis and research, detection instrumentation, biofunctionalization, and bioassay development to toxicity testing. Such an interdisciplinary approach is necessary for a better and safer theranostic use of UCNPs. Here, the status of nanotoxicity research on UCNPs is compared to other nanomaterials, and routes for the translation of UCNPs into clinical applications are delineated.
关键词： nanosafety,lanthanides,research development and innovation (R&D&I),safe-by-design,bioimaging,efficacy quality and safety (EQS),theranostics
更新于2025-09-04 15:30:14