Albano Carneiro

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Verified

Albano verified their affiliation via an institutional email.

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• PhD in Chemistry
• Researcher at University of Aveiro

Examples of molecular complexes acting as thermometers operating at room temperature in near infrared region are scarce, therefore this work showcases the anti-thermal quenching effect on neodymium(III) molecular thermometers working in biological windows within the physiological temperature range. A mononuclear complex, [Nd(L)(NO3)3] (1Nd), where...

Seven mononuclear lanthanide complexes have been isolated and structurally characterised. Four of them are cationic, whose charges are balanced by chloride counteranions, and exhibit pentagonal bipyramidal coordination geometry, whereas the...

Understanding the dynamics of photophysical processes in Ln3+ complexes remains challenging due to the intricate nature involving the metallic center, where sensitization (antenna effect) plays a pivotal role. Current studies have often overlooked the vibronic coupling within the antenna effect, leading to incomplete insights into excited-state dyn...

Lanthanide (Ln ³⁺ ) tetrakis complexes, C[Ln(L) 4 ], are important for applications due to their high quantum yields, solubility, and stability. Their luminescent properties depend on the structure, particularly the coordination polyhedron, the assessment of computational methods for calculating their structures is paramount. Usually, this assessme...

This work showcases the first evidence of the anti-thermal quenching effect on neodymium(III) molecular thermometers working in biological windows within the physiological temperature range. A mononuclear complex, [Nd(L)(NO3)3] (1Nd), where L is a macrocyclic ligand, was synthesized and used as a precursor to develop two novel species: a dinuclear...

Motivated by the importance of Hg 2+ detection in water due to its harmful effect on the environment and human health, we investigated a recently developed nanocomposite based on carbon dots (CDs) and LAPONITE as an optical chemical sensor using photoluminescence emission. While several studies have reported the Hg 2+ detection using CDs' photolumi...

This research presents a series of PMMA thin layers (labelled Ln_PMMA, where Ln = Eu3+, Tb3+, Sm3+, Dy3+) with high overall emission quantum yields of Q_Eu^L = 85%, Q_Tb^L =...

This study provides new theoretical insights into the vibrational spectra of Ln(III) complexes, along the lanthanide series by utilizing the LModeAGen protocol and integrating cutting-edge topological ideas. It provides a quantitative interpretation of the vibrational spectra of [Ln(trensal)] complexes at the B3LYP/MWBn(Ln)/6-311++G** (n from 46 (L...

A new luminescence thermometry method uses surface- engineered carbon dots with temperature-responsive phosphorescence. Activated by low-power LED and measured via smartphone, it shows 7.9% °C ⁻¹ sensitivity, surpassing existing CD-based thermometers.

Localized enhancement of upconversion luminescence in silver nanowires allows the direct visualization of plasmonic hot-spots; however, the effect on the emission spectra of Er ³⁺ ions must be corrected for accurate ratiometric thermometry analysis.

Luminescent trivalent lanthanide (Ln³⁺) complexes are compounds of technological interest due to their unique photophysical properties, particularly anionic tetrakis complexes, given their higher stability and emission quantum yields. However, structural studies on the cation–anion interaction in these complexes and the relation of such to luminesc...

The lanthanide coordination compounds NMe4[LnL4], NEt4[LnL4] and PPh4[LnL4] (Ln3+ = Eu, Gd, Tb) with carbacylamidophosphate (CAPh) ligand dimethyl-N-trichloroacetylamidophosphate (HL= Cl3CC(O)N(H)P(O)(OMe)2) were synthesized. The complexes are characterized through infrared, ultraviolet diffuse...

Abstact Counterfeiting remains a significant threat, causing economic and safety concerns. Addressing this, authentication technologies have gained traction. With the rise of the Internet of Things, authentication is crucial. Photonic Physical Unclonable Functions (PUFs) offer unique identifiers. We present low‐cost and sustainable e‐tags that may...

We report the synthesis and single-crystal X-ray diffraction, magnetic, and luminescence measurements of a novel family of luminescent cage-like tetranuclear silsesquioxanes (PhSiO 1.5 ) 8 (LnO 1.5 ) 4 (O)(C 5 H 8 O 2 ) 6 (EtOH) 2 (CH 3 CN) 2 ⋅2CH 3 CN (where Ln = Tb, 1 ; Tb/Eu, 2 ; and Gd, 3 ), featuring seven-coordinated lanthanide ions arranged...

This work challenges the conventional approach of using NdIII 4F3/2 lifetime changes for evaluating the experimental NdIII→YbIII energy transfer rate and efficiency. Using near-infrared (NIR) emitting Nd:Yb mixed-metal coordination poly-mers (CPs), synthesized via solvent-free thermal grinding, we demonstrate that the NdIII [2H11/2 → 4I15/2] → YbII...

Correction for ‘Carbon dots on LAPONITE® hybrid nanocomposites: solid-state emission and inter-aggregate energy transfer’ by Bruno S. D. Onishi et al. , Nanoscale , 2024, https://doi.org/10.1039/d3nr06336d.

Solid-state and aquous emission by hybrids nanocomposites based on carbon dots/LAPONITE® – energy transfer (ET) between aggregates.

Research on luminescent tetrakis coordination compounds containing trivalent lanthanide ions (Ln 3+) has greatly increased in the last two decades owing to their unique spectroscopic properties and advantages over traditional tris compounds. In this review, we target the synthesis, crystal structure, and luminescence properties of Ln 3+ tetrakis co...

A series of novel lanthanide β‐diketonate coordination compounds containing the ancillary ligand bis(diphenylphosphino) oxide (dppeO2) have been synthesized, characterized, and studied spectroscopically. The compounds of formulas Ln(β‐dik)3(dppeO2), where Ln: Eu and Gd and β‐dik ligands as tta (Ln‐1), btf (Ln‐2), bzac (Ln‐5) and tfac (Ln‐4), and Ln...

The cover highlights one-dimensional coordination polymers containing lanthanide ions (DyIII, TbIII, and EuIII). These compounds display emission changes dependent on the excitation wavelength, including DyIII shifting from blue to white light. Energy transfer calculations confirm a case of sensitization of LnIII through the singlet state rather th...

Despite the great effort made in recent years on lanthanide-based ratiometric luminescent nanothermometers able to provide temperature measurements in water, their design remains challenging. We report on the synthesis and properties of efficient ratiometric nanothermometers that are based on mesoporous stellate nanoparticles (MSN) of ca. 90 nm fun...

Luminescence (nano)thermometry is a remote sensing technique that relies on the temperature dependency of the luminescence features (e.g., bandshape, peak energy or intensity, and excited state lifetimes and risetimes) of a phosphor to measure temperature. This technique provides precise thermal readouts with superior spatial resolution in short ac...

Materials based on Eu³⁺ and Tb³⁺ coordination compounds are of great interest due to their strong red and green luminescence. Appropriate selection of ligands plays a huge role in optimizing their photophysical properties. Another very helpful instrument for such optimization is theoretical modelling, which permits the prediction of the emissive pr...

Generally, it is known that the intensity of the emission of trivalent lanthanide ions (Ln3+) increases on cooling because of the reduced decay of the excited state population via the phonon-mediated nonradiative transitions. In contrast to this, some studies in the recent past have shown that the intensity of Eu3+ photoluminescence decreases drama...

The increasing demand for computing power and downscaling is reaching the limits of the current lithographic methods, further precluding the shrinkage of the silicon chips using state-of-the-art top-down approaches. Moreover, the current chip shortage exposes the excessive world dependence on silicon, stressing the need for silicon-free computing t...

There is a growing interest in alternatives to lanthanide ion (Ln(III))-based luminescence sensitizing chromophores for in vivo applications, mainly in optical biological windows. Transition metals (M) are relevant candidates as chromophores as they have high absorption rates and emission bands covering a wide range of visible to near-infrared spec...

Computational studies on luminescent properties of lanthanides chelates are important for the pre-synthetic design of new luminescent materials. However, the development of suited computational methods and protocols is still in its infancy. Here we present a new computational protocol for a systematic description and analysis of luminescent propert...

In this work, we investigated from a theoretical point of view the dynamics of the energy transfer process from the ligand to Eu(III) ion for 12 isomeric species originating from six different complexes differing by nature of the ligand and the total charge. The cationic complexes present the general formula [Eu(L)(H2O)2]+ (where L = bpcd2- = N,N'-...

The effect of ligands' energy levels on thermal dependence of lanthanide emission was examined to create new molecular nanothermometers. A series of Ln2Ga8L8'L8″ metallacrowns (shorthand Ln2L8'), where Ln = Gd3+, Tb3+, or Sm3+ (H3L' = salicylhydroxamic acid (H3shi), 5-methylsalicylhydroxamic acid (H3mshi), 5-methoxysalicylhydroxamic acid (H3moshi),...

Multifunctional nano-objects containing a magnetic heater and a temperature emissive sensor in the same nanoparticle have recently emerged as promising tools towards personalized nanomedicine permitting hyperthermia-assisted treatment under local temperature control. However, a fine control of nano-systems’ morphology permitting the synthesis of a...

Five novel Eu(III)-β-diketonate complexes containing ruthenocene ancillary ligands (1,1′-bis(diphenylphosphoryl)-ruthenocene�RcBPO) were synthesized and characterized. The coordination compounds presented the general formula [Eu(β-dik) 3 (RcBPO)], where β-dik stands for 2-thenoyltrifluoroacetonate (tta), 3-benzoyl-1,1,1-trifluoroacetone (btf), 2-di...

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...

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...

New lanthanide dimethyl‐N‐benzoylamidophosphate (HL) based tetrakis‐complexes NEt4[LnL4] (Ln³⁺=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 the complex...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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.

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...