Lanthanides, the 14 4f-block elements plus Lanthanum, have been extensively used to study the structure and biochemical properties of metalloproteins. The characteristics of lanthanides within the lanthanide series are similar, but not identical. The present research offers a systematic investigation of the ability of the entire Ln series to substitute for Ca in biological systems. A well-calibrated DFT/PCM protocol is employed in studying the factors that control the metal selectivity in biological systems by modeling typical calcium signaling/buffering binding sites and elucidating the thermodynamic outcome of the competition between the "alien" La/Ln and "native" Ca, and La - Ln within the lanthanide series. The calculations performed reveal that the major determinant of the Ca/Ln selectivity in calcium proteins is the net charge of the calcium binding pocket; the more negative the charge, the higher the competitiveness of the trivalent Ln with respect to its Ca contender. Solvent exposure of the binding site also influences the process; buried active centers with net charge of -4 or -3 are characterized by higher Ln over Ca selectivity, whereas it is the opposite for sites with overall charge of -1. Within the series, the competition between La and its fellow lanthanides is determined by the balance between two competing effects: electronic (favoring heavier lanthanides) and solvation (generally favoring the lighter lanthanides).
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10094714 | PMC |
| http://dx.doi.org/10.3390/ijms24076297 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
This work presents the synthesis and characterization of three isomorphous lanthanide-based metal-organic frameworks (Ln-MOFs) (Ln3+ = Eu (1), Tb (2), and Sm (3)) supported by a pyridine-2,6-dicarboxamide-based linker offering appended arylcarboxylate groups. Single crystal X-ray diffraction studies highlight that these Ln-MOFs present three-dimensional porous architectures offering large cavities decorated with hydrogen bonding (H-bonding) groups. These Ln-MOFs display noteworthy luminescent characteristics.
View Article and Find Full Text PDFAn Emerging Toolkit of Ho Sensitized Lanthanide Nanocrystals with NIR-II Excitation and Emission for Bioimaging.
J Am Chem Soc
January 2025
Department of Chemistry, Laboratory of Advanced Materials, State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, China.
Optical imaging in the second near-infrared window (NIR-II, 1000-1700 nm) holds great promise for biomedical detection due to reduced tissue scattering and autofluorescence. However, the rational design of NIR-II probes with superior excitation wavelengths to balance the effects of tissue scattering and water absorption remains a great challenge. To address this issue, here we developed a series of Ho-sensitized lanthanide (Ln) nanocrystals (NaYF: Ho, Ln@NaYF) excited at 1143 nm, featuring tunable emissions ranging from 1000 to 2200 nm for bioimaging.
View Article and Find Full Text PDFUse of Luminescence Modulation in a New Series of Mixed Lanthanide Metal-Organic Frameworks for Selective Firearm Ammunition Marking.
ACS Omega
December 2024
Grupo de Química de Coordenação e Espectroscopia de Lantanídeos (GQCEL), Instituto de Química, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ 20550-013, Brazil.
Article Synopsis
- Metal-organic frameworks (MOFs), particularly mixed lanthanide MOFs (m-LnMOFs), are complex compounds that combine different lanthanide ions for tunable luminescence across the visible spectrum.
- Researchers have developed a new series of m-LnMOFs using 1,2,4,5-benzenetetracarboxylic acid, with detailed characterization and photophysical studies conducted.
- These m-LnMOFs have high thermal stability and multicolored emissions, making them useful as selective ammunition markers for forensic identification and improving ammunition trade regulation.
Structural Variation In β-Octamolybdate Polyoxoanion Based Crystals Across Lanthanide Series Isolated From A Water/DMSO Solution.
Chem Asian J
December 2024
IIT delhi, department of chemistry, Hauz Kahs, 110016, New Delhi, INDIA.
The crystallization of lanthanide-containing β-octamolybdate (β-{Mo8O26}4-) based solids from a binary 1:1 (water/DMSO) solution under ambient conditions is reported. A uniform synthetic protocol yielded three structurally related series of general composition {Ln(solvent)n}[NaMo8O26]·yH2O, with the whole lanthanide series (except for radioactive Pm). The three series are (i) {Ln(DMSO)8}[NaMo8O26]·0.
View Article and Find Full Text PDFWater-Induced Turn-on of Lanthanide Photoluminescence Emission and Application in Colorimetric Sensing of Trace Water.
ACS Omega
December 2024
Department of Chemistry, Faculty of Science, Chiang Mai University, 239 Houy Kaew Road, Chiang Mai 50200, Thailand.
To examine the water-induced photoluminescence turn-on and its potential application in trace water sensing, a new series of [Ln(dmba)(HO)]·2HO, where Ln = La (), Pr (), Nd (), Sm (), Eu (), Gd (), Tb (), Dy (), Ho (), and Er (), were synthesized using dimethoxybenzoic acid (Hdmba). Their single-crystal structures and thermal and chemical robustness were investigated, and the effects of lanthanide contraction and noncovalent interactions were discussed. The photoluminescence and colorimetric properties of - were investigated.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!