Albano Carneiro

Albano Carneiro
University of Aveiro | UA · Department of Physics

PhD in Chemistry

About

70
Publications
9,518
Reads
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681
Citations
Additional affiliations
March 2019 - present
University of Aveiro
Position
  • PostDoc Position
April 2016 - December 2018
Federal University of Pernambuco
Position
  • PhD Student

Publications

Publications (70)
Article
Ratiometric optical thermometers correspond to one of the most extensively studied applications of luminescent lanthanide materials in recent years. Even though several systems were studied involving the Eu3+ ion, few of them explore the absorption from the low-lying 7F1 excited state and its dependence on the ligand field (LF) splitting. This work...
Article
Optical Sensors The coupling of optical sensors to smartphones appears as a strategy for the new generation of mobile optical sensing and the Internet of Things (IoT). Healthcare services standout and the concepts of eHealth and mHealth emerge, being more and more explored towards the development of effective low‐cost and sustainable systems that p...
Article
Eu3+ complexes and specially β-diketonate compounds are well known and studied in several areas due to their luminescence properties, such as sensors and lightning devices. A unique feature of the Eu3+ ion is the experimental determination of the 4f–4f intensity parameters Ωλ directly from the emission spectrum. The equations for determining Ωλ fro...
Article
The new lanthanide dimethyl‐N‐benzoylamidophosphate (HL) based tetrakis‐complexes NEt 4 [LnL 4 ] (Ln 3+ = La, Nd, Sm, Eu, Gd, Tb, Dy) are reported. The complexes are characterized by means of NMR, IR, absorption, and luminescent spectroscopy as well as by elemental, X‐Ray, and thermal gravimetric analyses. The phenyl groups of the four ligands of t...
Article
The Tb³⁺ ⁷F5 level has been shown to play an important role in the energy transfer involving this ion. This is due to the unusually long lifetime of this level which is commonly overlooked when treating energy transfer involving this ion. In this work, we give a rationalized explanation for this phenomenon. It is discussed that the ⁷F5 level is fed...
Article
We report the synthesis, structures, magnetic and luminescent properties of a series of three-blade propeller homoleptic lanthanide complexes [LnL3](ClO4)3·H2O·2MeCN (Ln = Eu (1), Tb (2), Dy (3), Er (4), Yb...
Article
The understanding of intramolecular energy transfer (IET) processes in photoluminescent Eu3+ chelates is of great importance in the design of new efficient emitting devices, sensors, optical thermometers, etc. Even though the theoretical models have been established, some considerations on the participation of the thermally populated excited state...
Preprint
Full-text available
Eu3+ complexes and specially β-diketonate compounds are well known and studied in several areas due to their luminescence properties, such as sensors and lightning devices. A unique feature of the Eu3+ ion is the experimental determination of the 4f-4f intensity parameters Ωλ directly from the emission spectrum. The equations for determining Ωλ fro...
Chapter
Sensors play a key role on the Internet of Things (IoT) providing monitoring inside and outside the communication networks in a multitude of parameters. Challenges towards IoT lie in the lack of affordable strategies able to convert sustainably a signal from an optical sensors network into a digital data sequence. The coupling of optical sensors to...
Article
We present the experimental and theoretical results that made it possible to propose the energy transfer mechanism for a Yb complex with a large energy gap between the ligand and Yb excited states using a theoretical model and experimental data. Absorption and emission spectroscopy in the 300 – 4 K range is used for the study of the Yb³⁺ compound w...
Article
Eu3+ complexes and specially β-diketonate compounds are well known and studied in several areas due to their luminescence properties, such as sensors and lightning devices. A unique feature of the Eu3+ ion is the experimental determination of the 4f-4f intensity parameters Ωλ directly from the emission spectrum. The equations for determining Ωλ fro...
Chapter
The role of the energy transfer mechanisms behind the efficient emission of lanthanide-based complexes will be discussed. Emphasis will be given to the quantification of such energy transfer mechanisms to enable the rational design of lanthanide-based complexes (namely, β-diketones) for advanced photonic applications such as luminescent solar conce...
Article
Luminescence thermometry allows the remote monitoring of the temperature and holds the promise to drive the next generation of future nano or micrometric devices. Materials able to sense the temperature are usually based on one or several lanthanide ions allowing a ratiometric measurement. Optimizing the thermometric features is usually achieved th...
Article
Full-text available
The need to sense and track in real time through sustainable and multifunctional labels is exacerbated by the COVID‐19 pandemic, where the simultaneous measurement of body temperature and the fast tracking of people is required. One of the big challenges is to develop effective low‐cost systems that can promote healthcare provision everywhere and f...
Article
Photon upconversion taking place in small rare-earth-doped nanoparticles has been recently observed to be thermally modulated in an anomalous manner, showing thermal enhancement of the emission intensity. This effect was proved to be linked to the role of adsorbed water molecules as surface quenchers. The surface capping of the particles has a dire...
Article
White light-emitting diodes (WLEDs) revolutionized the lighting industry providing high energy efficiency and a long lifetime. The recent development of efficient ultraviolet (UV) LEDs pushed forward the development of WLEDs based on mixtures of down-shifting phosphors and the current challenges are focused on the design of sustainable light conver...
Article
JOYSpectra is a free-of-charge web platform for perform online calculations of spectroscopic properties of lanthanide-based compounds and materials. It has several features and functionalities to provide a detailed analysis of the intensity parameters. For instance, their dependence on the chemical environment of the lanthanide ion (Ln³⁺) such as s...
Article
A new series of 3D lanthanide (Ln) frameworks has been synthesized with the general formula [{Ln(L)(H2O)}·H2O]n(where Ln = La(1), Tb(2) and Dy(3);L= (HO)OC6H2(CH2COO)2; H3L= 2,5-dihydroxy-1,4-benzenediacetic acid = DHBDA). All the crystals were analyzed by single crystal X-ray diffraction. The Ln ions are octa-coordinated having the square antipris...
Article
An alternative approach to classical surface plasmon resonance spectroscopy is dielectric-loaded waveguide (DLWG) spectroscopy, widely used in the past decades to investigate bio-interaction kinetics. Despite their wide application, a successful and clear approach to use the DLWGs for the one-step simultaneous determination of both the thickness an...
Article
Persistently luminescent nanocrystals have been used to make flexible X-ray detectors that produce better images of 3D objects than do the flat-panel detectors currently widely used in radiography. Flexible X-ray detectors based on luminescent nanocrystals.
Article
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, as well as through plasmonic coupling. In this Perspective we highlight recent advances in upconversion emission modulation enabled...
Article
This work presents a theoretical study on the geometries and intramolecular energy transfer (IET) process of Tb3+‐complexes based on the Ruhemman's purple (RP) as ligands. Density functional theory and its time‐dependent extension are performed to examine the coordination energies and excited states using the ωB97X‐D3/MWB54/def2‐TZVP/polarizable co...
Article
In the last decade, numerous Ln‐bearing metal‐organic frameworks (MOFs) have been reported for luminescence thermometry applications. Although the Ln³⁺ composition is always thoroughly determined, this parameter is never optimized to improve thermometric performances. Here, the optimization of thermometric performances of luminescent probes is tack...
Article
Seven-coordinate, pentagonal-bipyramidal (PBP) complexes [Ln(bbpen)Cl] and [Ln(bbppn)Cl], in which Ln = Tb3+ (products I and II), Eu3+ (III and IV), and Gd3+ (V and VI), with bbpen2- = N,N'-bis(2-oxidobenzyl)-N,N'-bis(pyridin-2-ylmethyl)ethylenediamine and bbppn2- = N,N'-bis(2-oxidobenzyl)-N,N'-bis(pyridin-2-ylmethyl)-1,2-propanediamine, were synth...
Article
Chemical bond is a ubiquitous and fundamental concept in chemistry, in which the overlap plays a defining role. By using a new approach based on localized molecular orbitals, the overlap properties, e.g., polarizability \({\overline{\upalpha}}_{\mathrm{OP}}\), population pOP, intra \({\mathrm{J}}_{\mathrm{OP}}^{\mathrm{intra}}\), and inter \({\math...
Article
Flexible coatings with dual capabilities for remote real-time temperature sensing and photothermal conversion have a huge potential in the field of advanced thermal actuated optoelectronic applications. In this work, we demonstrated that plastic free-standing films of intriguing upconversion high absolute emission quantum yield (~0.1452, excited at...
Article
Trivalent lanthanide ions (Ln3+) are used to prepare a plethora of coordination compounds; metal-organic frameworks (MOFs) being amongst the most sought-after in recent years. The porosity of Ln-MOFs is often complemented by the luminescence imparted by the metal centers, making them attractive multifunctional materials. Here, we report a class of...
Article
In this work, DFT-based calculations of overlap integrals (ρ) and excitations energies (Δε) associated with the diatomic-like pairs Ln³⁺-Ligand and Ln-Ln’ are presented. The ρ and Δε quantities are useful for the calculations of overlap polarizability, charge factors, intensity parameters (using the Simple Overlap and Bond Overlap models), 4f shiel...
Article
Measurement of thermogenesis in individual cells is a remarkable challenge due to the complexity of the biochemical environment (such as pH and ionic strength) and to the rapid and yet not well-understood heat transfer mechanisms throughout the cell. Here, we present a unique system for intracellular temperature mapping in a fluorescence microscope...
Article
Nanothermometry is the study of temperature at the submicron scale with a broad range of potential applications such as cellular studies or electronics. Molecular luminescent based nanothermometers offer a non‐contact means to record these temperatures with high spatial resolution and thermal sensitivity. A luminescent based molecular thermometer c...
Article
Lanthanide complexes with efficient antenna effect and multifunctional optical-magnetic activity are very appropriate for potential applications. Multidentate ligands efficiently sensitizing emission of different lanthanide ions are rare and complexes often suffer from bleaching. Presented here are photostable lanthanide complexes with single-magne...
Article
Lanthanide complexes with efficient antenna effect and multifunctional optical-magnetic activity are very appropriate for potential applications. Multidentate ligands efficiently sensitizing emission of different lanthanide ions are rare and complexes often suffer from bleaching. Presented here are photostable lanthanide complexes with single-magne...
Article
In this work, the coordination compounds presenting the formulas [Eu(acac)(NO 3) 2 (phen) 2 ]⋅H 2 O (Eu1) and [Eu(bzac)(NO 3) 2 (phen) 2 ]⋅H 2 O (Eu2), acac: acetylacet-onate, bzac: benzoylacetonate and, phen: 1,10-phenantroline, were successfully synthesized and some spectroscopic properties were investigated by theoretical and experimental method...
Article
Chalcones are a widespread group of natural compounds characterized by the basic structure 1,3-diaryl-2-propen-1-one. In this study, we focused on the uncommon formylated chalcone 3’-formyl-2’,4’,6’-trihydroxy-5’-methyldihydrochalcone that possess interesting antimicrobial and anticancer potential. Considering the pharmacological relevance of this...
Article
In this study the optical spectroscopy, the excited state dynamics, and in particular the Tb3+→ Eu3+ energy transfer, have been investigated in detail both from the theoretical and experimental point of view in eulytite double phosphate hosts A3Tb(PO4)3 (A = Sr, Ba) doped with Eu3+. It has been found that the energy transfer is strongly assisted by...
Article
Eighteen new Eu3+ complexes and their Gd3+ analogues with 1,3-diketonate as main ligands and N-(pyridine-2-yl)amides or N-(pyrimidine-2-yl)amides as ancillary ligands were synthesized. The replacement of water molecules by those amides in the Eu3+ complexes increase the intrinsic quantum yields of luminescence, making them comparable or even more e...
Article
Lanthanide coordination compounds of the formula Na[Ln(L)4] (1Ln), where Ln = La³⁺, Eu³⁺, Gd³⁺, Tb³⁺, L = [L]⁻ and HL = dimethyl(4-methylphenylsulfonyl)amidophosphate, were synthesized. Their structural and spectroscopic properties were discussed in detail based on X-ray diffraction measurements, IR spectroscopy, absorption and emission spectroscop...
Chapter
A critical review on the mechanisms and behavior of 4f intraconfigurational transitions in controllable chemical environments related to nonradiative intramolecular energy transfer processes in lanthanide chelates is presented. The term “modeling” is here used in the sense of manipulating and controlling the photophysical properties of these compou...
Article
The odd-even effect in luminescent [Eu2 (L)3 (H2 O)x ]⋅y(H2 O) complexes with aliphatic dicarboxylate ligands (L: OXA, MAL, SUC, GLU, ADP, PIM, SUB, AZL, SEB, UND, and DOD, where x=2-6 and y=0-4), prepared by the precipitation method, was observed for the first time in lanthanide compounds. The final dehydration temperatures of the Eu3+ complexes s...
Conference Paper
Full-text available
Bond Overlap Polarizability Package (BOPP) is a software that allows the calculation of the overlap properties [1] for chemical bonds in molecular systems. The BOPP usage is dependent on a set of Localized Molecular Orbitals (LMO) obtained in GAMESS program. Generally, quantum chemistry programs have high computational demand and the code paralleli...
Article
In this work the aim is three-fold: 1) to call attention for shielding effects in the energy transfer rates between lanthanide ions. 2) to use a new model for treating the Judd-Ofelt ΩK intensity parameters in centrosymmetric systems by using a thermal root mean squared displacement around each ligating atom (ion) in the analysis of the intensity p...
Chapter
In this chapter, we review the main theoretical points of our work on the influence of spherical metallic nanoparticles on the 4f-4f luminescence of rare-earth ions in bulk materials. Two aspects are emphasized: (i) the balance between local field enhancement due to surface plasmons, nonradiative energy transfer from the rare-earth ions to the nano...
Article
The present work aims to report the theoretical study on the geometry and spectroscopy of different Ruhemann's Purple (RP) isomers and the spectroscopic study on different [Eu(RP)2(H2O)Y–X(Cl)X] coordination compounds, where Y = 2 or 3 and X = 0, 1, 2 and 3 (for Y = 3). Density functional theory (DFT) calculations were performed to examine the coor...
Article
Hydrothermal method was applied in order to synthesize nanocrystalline YVO4, LaVO4 and GdVO4 materials doped with Eu³⁺ ions. The conditions of synthesis were chosen to allow control of the process based on precipitation reaction in an autoclave, at elevated temperature and pressure. The prepared materials crystallized as single phase spherical-like...
Conference Paper
Full-text available
The intensity parameters Ωλ (λ = 2, 4, 6) within the Judd-Ofelt theory are described mainly by the forced electric dipole and the dynamics coupling mechanisms related to the chemical environment and the rare-earth ion. A new treatment [1], where the overlap contribution is taken into account as a surface contact between the lanthanide ion and the l...
Conference Paper
Full-text available
The theoretical intensity parameters depend on the chemical environment and the nature of rare-earth ion, where in the absence of inversion center, the two main contributions are the forced electric dipole mechanism (FED) and the dynamics coupling (DC) mechanism. A new treatment [1], where the overlap contribution is explicitly accounted as a surfa...
Conference Paper
Full-text available
The overlap polarizability (α op) and ionic specific valence were recently used [1] to reshape and reinterpret the expressions of the forced electric dipole (FED) and the dynamic coupling (DC) mechanisms. In this context, the ligand effective polarizability describes the environment polarizability not accounted in α op. In the present work, we repo...
Conference Paper
Full-text available
The complexes that Ruhemann's Purples (RP) forms with europium or terbium ions are suitable for fingerprint development on strongly fluorescent surfaces because of the enhancement of the lanthanide luminescence via intramolecular energy. The literature reports [1] the synthesis and experimental characterization of Eu 3+ complex with RP ligands. The...
Article
Full-text available
A series of La1-xEuxVO4 samples with a different Eu³⁺ content was synthesized via a hydrothermal route. Increase in the dopant content resulted in decrease in lattice constants of the materials. Plane-wave DFT calculations with PBE functional in CASTEP confirmed this trend. Next, CASTEP calculations were used to obtain force constants of Eu-O bond...
Article
A new approach to calculate the effective Ln–Ln energy transfer rates in a doped crystal matrices was proposed and successfully applied to the YVO4:Yb3+,Er3+ upconversion system. This approach is based on the known set of Ln–Ln distances obtained from the crystal structure of the matrix and the probabilities of their occurrence. The non-radiative e...
Article
This work reports on the influence of structural distortions on 4 f-4 f intensity parameters. These distortions in the first coordination sphere were applied to two complexes with similar structures, Ln(bpyO2)4(ClO4)3 (Ln=Pr3+, Nd3+ ions and bpyO2=2,2’-bipyridine-1,1'-dioxide). The 4 f-4 f intensity theory and the PM3/Sparkle model were used. It is...
Article
Ca3Sc2Si3O12 doped with 1 mol% Eu3+ and having a cubic garnet structure was prepared by a solid state reaction. The low temperature luminescence spectrum shows no measurable 5D0→7F0 band, in agreement with the location of the lanthanide dopant in a site of D2 symmetry, i.e. with a Ca2+ substitution. On the other hand, the spectrum is clearly domina...
Article
Ca3Sc2Si3O12 doped with 1mol% Eu3+ and having a cubic garnet structure was prepared by a solid state reaction. The low temperature luminescence spectrum shows no measurable 5D0→7F0 band, in agreement with the location of the lanthanide dopant in a site of D2 symmetry, i.e. with a Ca2+ substitution. On the other hand, the spectrum is clearly dominat...
Article
Much is known about the photoluminescence of lanthanide-containing systems, particularly amorphous silicates or organic-inorganic hybrids and crystalline metal-organic frameworks. Comparatively, stoichiometric microporous Ln-silicates are poorly studied. Here, we report the exceptional photoluminescence of microporous AV-24, K(7)[Ln(3)Si(12)O(32)]...

Projects

Projects (5)
Project
The Special Issue, “Thermometry Based on Lanthanide Ions”, aims to present new articles describing fundamental descriptors and their roles to explain the thermal behavior involved in Ln-based thermometers. Articles describing fundamental aspects such as energy-transfer analysis as well as photophysical and magnetic properties are encouraged. Papers reporting only synthesis and routine experiments without a deep discussion of fundamental aspects of thermometric properties will not be considered. www.mdpi.com/si/89949
Project
Synthesis and optical characterization of nanoparticles