A5033091357- Lanthanide and Transition Metal Complexes
- Luminescence Properties of Advanced Materials
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Magnetism in coordination complexes
- Radioactive element chemistry and processing
- Photochemistry and Electron Transfer Studies
- Chemical Thermodynamics and Molecular Structure
- Atomic and Subatomic Physics Research
- Electron Spin Resonance Studies
- Metal-Organic Frameworks: Synthesis and Applications
- Metal complexes synthesis and properties
- Luminescence and Fluorescent Materials
- Crystallography and molecular interactions
- Advanced MRI Techniques and Applications
- Carbon and Quantum Dots Applications
- Gas Sensing Nanomaterials and Sensors
- Optical properties and cooling technologies in crystalline materials
- Thermal and Kinetic Analysis
- Organic Light-Emitting Diodes Research
- Analytical Chemistry and Sensors
- Perovskite Materials and Applications
- Nanocluster Synthesis and Applications
- Nanoplatforms for cancer theranostics
- Organometallic Complex Synthesis and Catalysis
University of Aveiro
2009-2025
Complejo Hospitalario Universitario de Santiago
2020
Universidade Federal de Pernambuco
2011-2019
Abstract Luminescence (nano)thermometry is a remote sensing technique that relies on the temperature dependency of luminescence features (e.g., bandshape, peak energy or intensity, and excited state lifetimes risetimes) phosphor to measure temperature. This provides precise thermal readouts with superior spatial resolution in short acquisition times. Although thermometry just starting become more mature subject, it exhibits enormous potential several areas, e.g., optoelectronics, photonics,...
Abstract In the last decade, numerous Ln‐bearing metal‐organic frameworks (MOFs) have been reported for luminescence thermometry applications. Although Ln 3+ composition is always thoroughly determined, this parameter never optimized to improve thermometric performances. Here, optimization of performances luminescent probes tackled by reporting a series mixed Eu –Tb frameworks. The are accessed as function content yielding maximum relative sensitivity between 0.19 and 0.44% K −1 registered...
Measurement of thermogenesis in individual cells is a remarkable challenge due to the complexity biochemical environment (such as pH and ionic strength) rapid yet not well-understood heat transfer mechanisms throughout cell. Here, we present unique system for intracellular temperature mapping fluorescence microscope (uncertainty 0.2 K) using rationally designed luminescent Ln3+-bearing polymeric micellar probes (Ln = Sm, Eu) incubated breast cancer MDA-MB468 cells. Two-dimensional (2D)...
Trivalent lanthanide ions (Ln3+) are used to prepare a plethora of coordination compounds, with metal–organic frameworks (MOFs) being among the most sought-after in recent years. The porosity Ln-MOFs is often complemented by luminescence imparted metal centers, making them attractive multifunctional materials. Here, we report class three-dimensional (3D) MOFs obtained from solvothermal reaction between 2,6-naphthalenedicarboxylic acid (H2NDC) and chlorides, yielding three types compounds...
Abstract Luminescence thermometry allows the remote monitoring of temperature and holds promise to drive next generation future nano or micrometric devices. Materials able sense are usually based on one several lanthanide ions allowing a ratiometric measurement. Optimizing thermometric features is achieved through serendipity approach, but it still appears difficult accurately predict sensing performance. Through combination experiment theoretical calculations, first example an energy‐driven...
Lanthanide-doped nanoparticles have great potential for energy conversion applications, as their optical properties can be precisely controlled by varying the doping composition, concentration, and surface structures, well through plasmonic coupling. In this Perspective we highlight recent advances in upconversion emission modulation enabled coupling with well-defined nanostructures. We emphasize fundamental understanding of luminescence enhancement, monochromatic amplification, lifetime...
This work challenges the conventional approach of using NdIII 4F3/2 lifetime changes for evaluating experimental → YbIII energy transfer rate and efficiency. Using near-infrared (NIR) emitting Nd:Yb mixed-metal coordination polymers (CPs), synthesized via solvent-free thermal grinding, we demonstrate that [2H11/2 4I15/2] [2F7/2 2F5/2] pathway, previously overlooked, dominates due to superior resonance J-level selection rule compatibility. finding upends focus on [4F3/2 4I11/2] transition...
Understanding the dynamics of photophysical processes in Ln3+ complexes remains challenging due to intricate nature involving metallic center, where sensitization (antenna effect) plays a pivotal role. Current studies have often overlooked vibronic coupling within antenna effect, leading incomplete insights into excited-state dynamics. To address these shortcomings, we introduce novel theoretical and computational approach that leverages impact vibrational modes S1 T1 states this effect...
In this study the optical spectroscopy, excited state dynamics, and in particular Tb3+ → Eu3+ energy transfer, have been investigated detail both from theoretical experimental point of view eulytite double phosphate hosts A3Tb(PO4)3 (A = Sr, Ba) doped with Eu3+. It has found that transfer is strongly assisted by fast migration donor subset. Moreover, rates efficiencies depend significantly on nature divalent elements present structure hence distances between Tb3+-Eu3+ nearest neighbors....
Seven-coordinate, pentagonal-bipyramidal (PBP) complexes [Ln(bbpen)Cl] and [Ln(bbppn)Cl], in which Ln = Tb3+ (products I II), Eu3+ (III IV), Gd3+ (V VI), with bbpen2– N,N′-bis(2-oxidobenzyl)-N,N′-bis(pyridin-2-ylmethyl)ethylenediamine bbppn2– N,N′-bis(2-oxidobenzyl)-N,N′-bis(pyridin-2-ylmethyl)-1,2-propanediamine, were synthesized characterized by single-crystal X-ray diffraction analysis, alternating-current magnetic susceptibility measurements, photoluminescence (steady-state...
The synthesis, structures, magnetic and luminescence (including thermometry) properties of a series three-blade propeller homoleptic lanthanide complexes are reported.
In this work, we investigated from a theoretical point of view the dynamics energy transfer process ligand to Eu(III) ion for 12 isomeric species originating six different complexes differing by nature and total charge. The cationic present general formula [Eu(L)(H2O)2]+ (where L = bpcd2– N,N′-bis(2-pyridylmethyl)-trans-1,2-diaminocyclohexane N,N′-diacetate; bQcd2– N,N′-bis(2-quinolinmethyl)-trans-1,2-diaminocyclohexane bisoQcd2– N,N′-bis(2-isoquinolinmethyl)-trans-1,2-diaminocyclohexane...
The effect of ligands' energy levels on thermal dependence lanthanide emission was examined to create new molecular nanothermometers. A series Ln2Ga8L8′L8″ metallacrowns (shorthand Ln2L8′), where Ln = Gd3+, Tb3+, or Sm3+ (H3L′ salicylhydroxamic acid (H3shi), 5-methylsalicylhydroxamic (H3mshi), 5-methoxysalicylhydroxamic (H3moshi), and 3-hydroxy-2-naphthohydroxamic (H3nha)) H2L″ isophthalic (H2iph), synthesized characterized. Within the series, ligand-centered singlet state (S1) ranged from...
A series of La1–xEuxVO4 samples with a different Eu3+ content was synthesized via hydrothermal route. An increase in the dopant resulted decrease lattice constants materials. Plane-wave DFT calculations PBE functional CASTEP confirmed this trend. Next, were used to obtain force Eu–O bond stretching, using novel approach which involved displacement ion. The then calculate charge donation factors g for each ligand atom. chemical parameters and geometries from theoretical Judd–Ofelt intensity...
Well-designed Ln compounds are UV converters with extremely high, triplet lifetime dependent emission QY, and show SIM behavior.
Computational studies on luminescent properties of lanthanides chelates are important for the pre-synthetic design new materials. However, development suited computational methods and protocols is still in its infancy. Here we present a protocol systematic description analysis Ln(III) chelates. The methodologies herein presented divided three major categories: (1) Utilization local vibrational mode theory obtaining Ln–ligand force constants; (2) Calculation ligand effective polarizabilities...