Non-invasive precise thermometers working at the nanoscale with high spatial resolution, where conventional methods are ineffective, have emerged over last couple of years as a very active field research. This has been strongly stimulated by numerous challenging requests arising from nanotechnology and biomedicine. critical review offers general overview recent examples luminescent non-luminescent nanometric scale. Luminescent encompass organic dyes, QDs Ln3+ions thermal probes, well more...

A unique Eu3+/Tb3+ luminescent self-referencing nanothermometer allowing absolute measurements in the 10–350 K temperature range and sub-micrometer spatial resolution is reported (see Figure). It has up to 4.9%·K−1 sensitivity high photostability for long-term use. The combination of molecular thermometry, superparamagnetism luminescence a nanometric host matrix provides multifunctionality opening way new exciting applications. Detailed facts importance specialist readers are published as...

Non-invasive accurate thermometers with high spatial resolution and operating at sub-micron scales, where the conventional methods are ineffective, currently a very active field of research strongly stimulated in last couple years by challenging demands nanotechnology biomedicine. This perspective offers general overview recent examples luminescent working micrometric nanometric particularly those involving advanced Ln3+-based functional organic–inorganic hybrid materials.

In this work we proposed a relative humidity (RH) sensor based on Bragg grating written in an optical fiber, associated with coating of organo-silica hybrid material prepared by the sol-gel method. The organo-silica-based has strong adhesion to fiber and its expansion is reversibly affected change RH values (15.0–95.0%) surrounding environment, allowing increased sensitivity (22.2 pm/%RH) durability due presence siliceous-based inorganic component. developed was tested real structure health...

Following a computational-experimental approach, highly luminescent β-diketonate-europium(III) complex containing 2-thenoyltrifluoracetonate (tta−) and 5,6-epoxy-5,6-dihydro-[1,10] phenanthroline (ephen) ligands, Eu(tta)3ephen (II), was theoretically studied by DFT/TD-DFT calculations, synthesized from Eu(tta)3(H2O)2(I) fully characterized high resolution mass spectrometry, TGA analysis, vibrational, UV-Vis photoluminescence spectroscopy. For intramolecular energy transfer analysis purpose,...

New europium and gadolinium tris-beta-diketonate complexes have been prepared incorporated in sol-gel-derived organic-inorganic hybrids, named di-ureasils. The general formula [Ln(btfa)3(4,4'-bpy)(EtOH)] (Ln=Eu, Gd; 4,4'-bpy=4,4'-bipyridine; btfa=4,4,4-trifluoro-1-phenyl-1,3-butanedione) for the was confirmed by X-ray crystallography elemental analysis. ground-state geometry of Eu3+ complex calculated from Sparkle/AM1 model. quantum yield obtained Sparkle model crystal structure (both 46%)...

Europium (t-Eu) and gadolinium (t-Gd) β-diketonate complexes with photoactive t-bpete ligand, [Ln(btfa)3(t-bpete)(MeOH)] (Ln = Eu, Gd), where btfa– are 4,4,4-trifluoro-1-phenyl-1,3-butanedionate trans-1,2-bis(4-pyridyl)ethylene, respectively, were synthesized, characterized by vibrational, absorption (reflectance) photoluminescence spectroscopies their crystal structure was determined using single-crystal X-ray diffraction. B3LYP calculations performed to support the interpretation...

There is an increasing demand for accurate, non-invasive and self-reference temperature measurements as technology progresses into the nanoscale. This particularly so in micro- nanofluidics where comprehension of heat transfer thermal conductivity mechanisms can play a crucial role areas diverse energy cell physiology. Here we present two luminescent ratiometric nanothermometers based on magnetic core coated with organosilica shell co-doped Eu3+ Tb3+ chelates. The design hybrid host chelate...

This work discusses quantitative aspects of energy transfer occurring in sol−gel derived organic−inorganic di-ureasil hybrids incorporating either [Eu(btfa)3(4,4'-bpy)(EtOH)] (btfa = benzoyltrifluoroacetonate, 4,4'-bpy 4,4'-bipyridine) or Eu(CF3SO3)3. Host-to-Eu3+ occurs via ligand singlet and triplet (T) excited states directly from the hybrid emitting centers through dipole−dipole, dipole−2λ pole (λ 2, 4, 6) exchange mechanisms. latter process is dominant for all discussed pathways. The...

Abstract Luminescent solar concentrators (LSCs) are cost‐effective components easily integrated in photovoltaics (PV) that can enhance cells' performance and promote the integration of PV architectural elements into buildings, with unprecedented possibilities for energy harvesting façade design, urban furnishings wearable fabrics. The devices' is dominated by concentration factor ( F ), which higher cylindrical LSCs compared planar ones (with equivalent collection area volume). feasibility...

The past decade has seen significant progresses in the ability to fabricate new mesoporous thin films with highly controlled pore systems and emerging applications sensing, electrical thermal isolation, microfluidics, solar cells engineering, energy storage, catalysis. Heat management at micro- nanoscale is a key issue most of these applications, requiring complete characterization that commonly performed using methods. Here, plasmonic-induced heating (through Au NPs) combined Tb3+/Eu3+...

This work discusses quantitatively the energy transfer mechanism that occurs in white-light emission of sol−gel derived amine- and amide-functionalized hybrids. The photoluminescence (PL) results from a convolution originated NH/CO groups organic/inorganic cross-links with electron-hole recombinations occurring siloxane nanoclusters, both emissions typical donor−acceptor pairs. Two model compounds reproduce separately two hybrid's were synthesized characterized by X-ray diffraction,...

The ligands−assisted rational design of a Eu3+-containing organic−inorganic hybrid (di-ureasil) displaying the highest emission quantum yield (0.60 ± 0.06) reported so far is introduced. Two new lanthanide complexes were synthesized in which metal (Eu3+ or Gd3+) first coordination sphere formed by three β-diketonate ligands (btfa 4,4,4-trifluoro-l-phenyl-1,3-butanedionate ion) and two methanol (MeOH) molecules. also comprise bpeta (1,2−bis(4−pyridyl)ethane) ligand. Eu3+ complex crystal...

Abstract An integrated photonic‐on‐a‐chip device based on a single organic‐inorganic di‐ureasil hybrid was fabricated for optical waveguide and temperature sensing. The is composed by thermal actuated Mach‐Zehnder (MZ) interferometer operating with switching power of 0.011 W maximum difference between branches 0.89 ºC. MZ covered Eu 3+ /Tb co‐doped luminescent molecular thermometer uncertainty 0.1ºC spatial resolution 13 µm. This an uncommon example in which the same material (an hybrid)...

Different oxide host matrices of ABO4 with A3+ (Eu) and B5+ (Nb, Ta, Sb) were prepared to investigate the solid state luminescence behavior Eu3+ as a self-activated emitter in orthoceramics. Crystal structures, phonon modes, metal valence states, optical excitation, emission properties including decay curves, colorimetry, nonstoichiometry defects studied using X-ray diffraction (XRD), Raman spectroscopy, photoluminescence (PL), photoelectron spectroscopy (XPS), electron paramagnetic...

The continuous decrease on the geometric size of electronic devices and integrated circuits generates higher local power densities localized heating problems that cannot be characterized by conventional thermographic techniques. Here, a self-referencing intensity-based molecular thermometer involving di-ureasil organic-inorganic hybrid thin film co-doped with Eu(3+) Tb(3+) tris (β-diketonate) chelates is used to obtain temperature map FR4 printed wiring board spatio-temporal resolutions 0.42...

Abstract Tris(β‐diketonato)europium( III ) complexes of general formula [Eu(TPI) 3 · L], with chelating ligands such as 3‐phenyl‐4‐(4‐toluoyl)‐5‐isoxazolone (HTPI) and adduct‐forming reagents [L = H 2 O, tri‐ n ‐octylphosphane oxide (TOPO), triphenylphosphane (TPhPO), 1,10‐phenanthroline], have been synthesized characterized by elemental analysis FT‐IR, 1 NMR, photoluminescence spectroscopy. The coordination geometries the were calculated using Sparkle/AM1 (Sparkle model for calculation...

Lanthanide orthoantimonates represented by the chemical formula LnSbO4 (Ln are all lanthanides elements with exception of cerium and promethium) were synthesized via solid-state reactions. The crystalline structures determined high-resolution Synchrotron X-ray diffraction Rietveld method. samples exhibited monoclinic two different arrangements as a function ionic radius lanthanide metal. For compounds largest radii = La Pr), P21/n space group was determined, while intermediate smallest...

The α-substituted β-diketonate [Ln(3Cl-acac)3(H2O)2] [Ln = Tb, Gd] complexes (with 3Cl-acac– being 3-chloro-2,4-pentanedionate) were characterized by elemental analysis, infrared, ultraviolet (UV)-visible and photoluminescence spectroscopies. For comparison purposes regarding photoluminescence, the well-known [Tb(acac)3(H2O)2] complex was also synthesized. By considering phosphorescence spectra of [Gd(3Cl-acac)3(H2O)2], effect chloride replacement hydrogen on triplet state energy 3Cl-acac...