Abstract Luminescence (nano)thermometry is an increasingly important field for remote temperature sensing with high spatial resolution. Most typically, ratiometric of the luminescence emission intensities two thermally coupled emissive states based on a Boltzmann equilibrium used to detect local temperature. Dependent range and preferred spectral window, various choices potential candidates appear possible. Despite extensive experimental research in field, universal theory covering basics...

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 Ratiometric luminescence thermometry with trivalent lanthanide ions and their 4f n energy levels is an emerging technique for non-invasive remote temperature sensing high spatial temporal resolution. Conventional ratiometric often relies on thermal coupling between two closely lying governed by Boltzmann’s law. Despite its simplicity, Boltzmann excited allows precise sensing, but only within a limited range. While low temperatures slow down the nonradiative transitions required to...

Ratiometric luminescence thermometry employing within the biological transparency windows provides high potential for biothermal imaging. Nd3+ is a promising candidate that purpose due to its intense radiative transitions (BWs) I and II simultaneous efficient excitability BW I. This makes almost unique among all lanthanides. Typically, emission from two 4F3/2 crystal field levels used but small ~100 cm−1 energy separation limits sensitivity. A higher sensitivity physiological temperatures...

Abstract Lanthanide‐doped luminescent nanoparticles are an appealing system for nanothermometry with biomedical applications due to their sensitivity, reliability, and minimal invasive thermal sensing properties. Here, four unique hybrid organic–inorganic materials prepared by combining β‐NaGdF 4 PMOs (periodic mesoporous organosilica) or mSiO 2 (mesoporous silica) proposed. PMO/mSiO excellent candidates biological/biomedical as they show high biocompatibility the human body. On other hand,...

Abstract Luminescence thermometry is used in a variety of research fields for noninvasive temperature sensing. Lanthanide‐doped micro‐/nanocrystals are exceptionally suitable this. The popular concept luminescence‐intensity‐ratio based on emission from thermally coupled levels single lanthanide ion, following Boltzmann's law. These thermometers can measure with low uncertainty, but only limited range. In this work, Ho 3+ ‐based thermometer presented and quantitatively modeled sustained...

Core-shell Er,Yb:LiLuF₄ nanocrystals were investigated for their use as high temperature thermometers. However, distribution of the dopants within anticipatedly protective undoped shells was observed, which questions common assumptions.

Abstract Red‐emitting narrow‐band phosphors are of utmost importance for next‐generation white‐light phosphor‐converted light‐emitting diodes (pc‐wLEDs) improved efficacy and optimized correlated color temperatures. A promising representative crystallizing in an ordered variant the UCr 4 C structure type is Sr[Li 2 Al O N ]:Eu 2+ (SALON:Eu ) emitting at a desirable wavelength 614 nm. Despite expected eightfold coordination Eu ions by four 3− 2− ions, respectively, exact local symmetry 1:1...

The development of dual-state emissive (DSE) fluorophores, i. e. organic molecules showing balanced emission in both solution and as molecular solids, has recently become an emerging approach material science, biology, sensing, optoelectronics. However, the majority existing DSE fluorophores represents structural modifications scaffolds known for their aggregation-induced (AIE) properties, g., tetraphenylethylenes (TFE), triphenylamines (TFA), others. In this study, we introduce aurones...

Photoluminescence spectra of Yb²⁺ ions doped into CsCaX₃ and CsSrX₃ (X = Cl, Br, I) depict a manifold transitions in high resolution, which allows detailed understanding the optical properties divalent lanthanide perovskite host lattices.

From quencher to potent activator – multimodal luminescence thermometry with Fe³⁺ in the oxides MAl₄O₇ (M = Ca, Sr, Ba).

Lanthanide-doped (nano)crystals are an important class of materials in luminescence thermometry. The working mechanism these thermometers is diverse but most often relies on variation the ratio emission intensities from two thermally coupled excited states with temperature. At low temperatures, nonradiative coupling between can be slow compared to radiative decay, but, at higher reach thermal equilibrium due faster coupling. In equilibrium, intensity follows Boltzmann statistics, which gives...

Abstract The new microporous metal organic framework [La 2 (H O) 5 TPPE)]·3H O ( CAU‐54 ), is obtained in a hydrothermal reaction of the linker 1,1,2,2‐tetrakis(4′‐phosphonophenyl)ethylene 8 TPPE) and La 3+ ions. extensive characterization including temperature‐dependent crystal structures spectroscopic properties allowed to understand unique, multi‐responsive material properties. exhibits rarely observed reversible photochromism as well turn‐on photoluminescence by various external chemical...

Luminescence thermometry has emerged as a promising approach for remote, non-invasive temperature sensing at the nanoscale. One of simplest approaches in that regard is single-ion luminescence Boltzmann that...

The continuous development of innovative optical materials with lanthanoid ions as activators has emerged a modern sector chemistry. Our experience the fabrication single crystals float zone motivated us to investigate luminescence Nd3+ and Ho3+ in garnets (Gd3-xREx)In2Ga3O12 (RE = Nd Ho, x 0; 0.15 0.30). Upon usage an Ar/O2 (80:20 ratio) atmosphere application auxiliary pressure (6 bar) suppress In2O3 evaporation, crystalline domain sizes order ~ 6 1 mm³ obtained. Structural analysis...

Herein, we report on the thermal and chemical stability CO2 water vapor adsorption of a mixed linker phosphonate-MOF [Cu(4,4’‐bpy)0.5(1,4‐NDPAH2)], namely TUB41 (bpy = bipyridine NDPAH4 naphthalenediphosphonic acid). exhibits reversible phase transitions upon heating until 330 °C. is very stable MOF across pH range 1 to 11 after two years repeated experiments activation at 80 °C ambient humidity. While gases with larger kinetic diameter do not access narrow pores TUB41, it can efficiently...

Accurate ab initio quantum chemical approaches for the description of two-open-shell centers in periodic systems, such as lanthanoid ions inorganic host matrices, remain a challenging topic computational chemistry. In contrast, experimental high-quality spectroscopic data on selected lanthanoid-activated phosphors are widely available and offer perfect ground to test new theoretical developments. One particular benchmark methods field 4fn-15d1 → 4fn-based broad-band emitting Ce3+ (n = 1) or...

The continuous development of innovative optical materials with lanthanoid ions as activators has emerged a modern sector chemistry. Our experience the fabrication single crystals float zone motivated us to investigate luminescence Nd3+ and Ho3+ in garnets (Gd3-xREx)In2Ga3O12 (RE = Nd Ho, x 0; 0.15 0.30). Upon usage an Ar/O2 (80:20 ratio) atmosphere application auxiliary pressure (6 bar) suppress In2O3 evaporation, crystalline domain sizes order ~ 6 1 mm³ obtained. Structural analysis...

Eu2+ activated alkali lithooxidosilicates have emerged as promising candidates for narrow‐band cyan and green‐emitting phosphors human‐centered lighting. Despite the vivid research on Eu2+‐activated lithooxidosilicates, little to nothing is known about possible luminescence with other activator ions than Eu2+. The more abundant transition metal ion Mn2+ a potential alternative emitter tunable emission over visible spectral range. Mn2+‐activated show two bands in green red range respectively,...

Eu2+ activated alkali lithooxidosilicates have emerged as promising candidates for narrow‐band cyan and green‐emitting phosphors human‐centered lighting. Despite the vivid research on Eu2+‐activated lithooxidosilicates, little to nothing is known about possible luminescence with other activator ions than Eu2+. The more abundant transition metal ion Mn2+ a potential alternative emitter tunable emission over visible spectral range. Mn2+‐activated show two bands in green red range respectively,...