Luminescence kinetics and association equilibria of lanthanide ions in aqueous solutions

1984 ◽  
Vol 13 (7) ◽  
pp. 481-491 ◽  
Author(s):  
P. Becker ◽  
B. A. Bilal
Keyword(s):  
Aqueous Solutions ◽  
Lanthanide Ions ◽  
Luminescence Kinetics ◽  
Association Equilibria

Spectroscopic System for Direct Lanthanide Photoluminescence Spectroscopy with Nanomolar Detection Limits

2009 ◽  
Vol 63 (5) ◽  
pp. 483-493 ◽  
Author(s):  
Christopher M. Andolina ◽  
William G. Holthoff ◽  
Phillip M. Page ◽  
Ryan A. Mathews ◽  
Janet R. Morrow ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Ethylenediaminetetraacetic Acid ◽  
Bound Water ◽  
Emission Spectra ◽  
Lanthanide Ions ◽  
Visible Range ◽  
Time Resolved ◽  
Nanomolar Detection ◽  
Time Resolved Photoluminescence ◽  
The Eu

A new spectroscopic system for direct photoluminescence of lanthanide ions (Ln(III)) through electronic transitions within the 4fn manifold is described. The system is based on an injection seeded frequency tripled (λ = 355 nm) Nd:YAG pump laser coupled with a master oscillator power oscillator (MOPO). The MOPO delivers an average pulse energy of ⪝60 mJ/pulse, is continuously tunable from 425 to 690 nm (Signal) and 735 to 1800 nm (Idler) with a linewidth of <0.2 cm−1, and has a pulse duration of 10–12 ns. Aqueous solutions containing two polyaminocarboxylate complexes, ethylenediaminetetraacetic acid (EDTA) and diethylenetriaminepentaacetic acid (DTPA), and Ln3+ aqua ion for several lanthanides including Eu(III), Tb(III), Dy(III), and Sm(III)) are used as steady-state and time-resolved photoluminescence standards. The versatility of the instrument is demonstrated by excitation scans over a broad visible range for aqueous solutions of complexes of Eu(III), Dy(III), Sm(III), and Tb(III). The Eu(III) excitation band (7Fo→5Do) is recorded over a range of complex concentrations that are 1000–fold less than reported previously, including Eu(EDTA) (1.00 nM), Eu(DTPA) (1.00 nM), and Eu(III) aqua ion (50.0 nM). Emission spectra are recorded in the visible range for Ln(III) complexes at pH 6.5 and 1.00 mM. Excited-state lifetimes for the standards were constant as a function of concentration from 10.0 nM to 1.00 mM for Eu(EDTA) and Eu(DTPA) and from 100 nM to 1.00 mM for Eu(III) aqua ion. Photoluminescence lifetimes in H2O and D2O are recorded and used to calculate the number of bound water molecules for all complexes.

scholarly journals Investigation of Pyrophosphates KYP2O7Co-Doped with Lanthanide Ions Useful for Theranostics

Nanomaterials ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 1597
Author(s):  
Adam Watras ◽  
Marta Wujczyk ◽  
Michael Roecken ◽  
Katarzyna Kucharczyk ◽  
Krzysztof Marycz ◽  
...  
Keyword(s):  
Cell Line ◽  
Spectroscopic Properties ◽  
Lanthanide Ions ◽  
X Ray Diffraction ◽  
Osteogenic Markers ◽  
Osteoblast Cell Line ◽  
Luminescence Kinetics ◽  
One Step ◽  
Potential Factors

Diphosphate compounds (KYP2O7) co-doped with Yb3+ and Er3+ ions were obtained by one step urea assisted combustion synthesis. The experimental parameters of synthesis were optimized using an experimental design approach related to co-dopants concentration and heattreatment as well as annealing time. The obtained materials were studied with theinitial requirements showing appropriate morphological (X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM)) and spectroscopic properties (emission, luminescence kinetics). Moreover, the effect of Er3+ and Yb3+ ions doped KYP2O7 on morphology, proliferative and metabolic activity and apoptosis in MC3T3-E1 osteoblast cell line and 4B12osteoclasts cell line was investigated. Furthermore, the expression of the common pro-osteogenic markers in MC3T3-E1 osteoblast as well as osteoclastogenesis related markers in 4B12 osteoclasts was evaluated. The extensive in vitro studies showed that KYP2O7 doped with 1 mol% Er3+ and 20 mol% Yb3+ ions positively affected the MC3T3-E1 and 4B12 cells activity without triggering their apoptosis. Moreover, it was shown that an activation of mTOR and Pi3k signaling pathways with 1 mol% Er3+, 20 mol% Yb3+: KYP2O7 can promote the MC3T3-E1 cells expression of late osteogenic markers including RUNX and BMP-2. The obtained data shed a promising light for KYP2O7 doped with Er3+ and Yb3+ ions as a potential factors improving bone fracture healing as well as in bioimaging (so-called in theranostics).

Influence of Counterions on the Hydration Structure of Lanthanide Ions in Dilute Aqueous Solutions

2018 ◽  
Vol 122 (10) ◽  
pp. 2779-2791 ◽  
Author(s):  
Valentina Migliorati ◽  
Alessandra Serva ◽  
Francesco Sessa ◽  
Andrea Lapi ◽  
Paola D’Angelo
Keyword(s):  
Aqueous Solutions ◽  
Lanthanide Ions ◽  
Hydration Structure ◽  
Dilute Aqueous Solutions

Complexes of carbohydrates with metal cations. VIII. Lanthanide-induced shifts in the P.M.R. spectra of some methyl glycosides and 1,6-anhydrohexoses

1976 ◽  
Vol 29 (6) ◽  
pp. 1231 ◽  
Author(s):  
SJ Angyal ◽  
D Greeves ◽  
L Littlemore ◽  
VA Pickles
Keyword(s):  
Aqueous Solutions ◽  
Metal Cations ◽  
Lanthanide Ions ◽  
Lanthanide Induced Shifts ◽  
Approximate Location

Addition of lanthanide ions to aqueous solutions of some methyl glycosides and 1,6-anhydrohexoses causes shifts of the signals in their p.m.r. spectra. The approximate location of the cation in the complexes was determined and an attempt was made to explain the shifts in terms of contact and pseudocontact interactions.

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