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1

Nowe strategie wysokociśnieniowej manometrii luminescencyjnej

Runowski Marcin

Wiadomości Chemiczne

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2023

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[Z] 77, 11-12

11--12

EN

Optical pressure sensors, namely luminescent manometers, offer new possibilities for studying and monitoring changes in the physicochemical properties of materials under extreme conditions in a remote and non-invasive manner. This can be achieved through the monitoring and analysis of selected spectroscopic parameters, such as band intensity ratios, emission line shifts, or luminescent lifetimes. However, a limitation for optical readings usually arises from the quenching of the luminescent signal in the given material, i.e., in the active part of the sensor under elevated pressure conditions. In this article, new strategies for the development of advanced and ultra-sensitive luminescent pressure sensors, mainly based on inorganic materials doped with lanthanide or d-block metal ions, will be presented and analyzed. Factors influencing the enhancement of luminescent signal intensity and sensor sensitivity will be discussed. These objectives can be achieved through the appropriate selection of the soft host matrices (of high compressibility), doping with various lanthanide and d-block metal ions, using interionic energy transfer, pressure-driven configurational crossover, as well as the use of materials exhibiting both photo- and mechanoluminescence phenomena. Finally, the development of bi-functional pressure and temperature sensors operating under extreme conditions will also be discussed.

2

Wieloskładnikowe szkła tytanowo-germanianowe dla podczerwonej fotoniki

Kowalska Karolina, Kuwik Marta, Pisarska Joanna, Dorosz Dominik, Pisarski Wojciech A.

Przegląd Elektrotechniczny

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2022

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R. 98, nr 9

186--189

PL

W pracy omówiono wieloskładnikowe szkła tytanowo-germanianowe domieszkowane pojedynczo jonami Nd3+, Er3+, Tm3+ i Ho3+. Określono wpływ składnika TiO2 na właściwości luminescencyjne w zakresie bliskiej podczerwieni jonów lantanowców w szkłach barowo-galowogermanianowych. Intensywność luminescencji jonów lantanowców jest wzmocniona w wyniku obecności TiO2. Wyniki badań luminescencyjnych szkieł są obiecujące pod kątem potencjalnych zastosowań w podczerwonej fotonice.

EN

In this work, multicomponent titanate-germanate glasses singly doped with Nd3+, Er3+, Tm3+ and Ho3+ ions are discussed. The influence of TiO2 component on the near-infrared luminescent properties of lanthanide ions in barium-gallo-germanate glasses was determined. Luminescence intensities of lanthanide ions are enhanced in the presence of TiO2. Luminescent results for the studied glasses are promising in relation to potential applications in the infrared photonics.

3

Porfiryny zamknięte w żelu krzemionkowym

Wiglusz R. J.

Wiadomości Chemiczne

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2011

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[Z] 65, 7-8

675-703

EN

The need for new, chemically and physically stable luminescent materials operating with UV excitations has stimulated research on luminescence properties of doped sol–gel material. In this work, it has been presented a technology of production of silica gels doped with organic molecules, lanthanide compounds and organic/inorganic composites. Optical properties of these materials as functions of temperature, concentration and excitation wavelength are presented. Dynamics of excited states has been discussed based on the decay times and emission efficiencies data. Mechanisms of ligand-to-metal energy transfer as well as other processes affecting emission efficiency are considered. Silica sol–gels doped with di-aminoacid derivatives of porphyrins: PP(Ser)2(Arg)2, PP(Ala)2(Arg)2, PP(Met)2(Arg)2, where Met, Arg and Ser denote methionine, serine and arginine aminoacids, respectively, and H2TTMePP {tetrakis[4-(trimethylammonio)phenyl]-21H,23H-porphine} have been obtained and spectroscopically studied. These materials can find applications as phosphors or sensors of UV irradiation.

4

Analityczne zastosowanie zjawiska chemiluminescencji. Jony lantanowców(III) i ich kompleksy jako fluorofory w mieszaninach reakcyjnych

Kaczmarek M., Lis S.

Wiadomości Chemiczne

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2009

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[Z] 63, 11-12

985-1001

EN

The aim of this review is to evaluate the use of chemiluminescence (CL) as the method for determination of a wide group of organic and inorganic compounds. Chemiluminescence can be defined as the light emission resulting from the transition of an electronically excited state produced in a reaction [1, 2]. CL, in spite of complicated processes occurring in reaction systems, has been used since many years in chemical analysis [13, 22, 30]. Although many chemiluminescence reagents investigated, only a limited number, such as luminol, tris(2,2-bipyridyl)ruthenium(III), potassium permanganate and the Fenton reaction, generating chemical sources of reactive oxygen and nitrogen species, were successfully used for analytical applications. The Fenton system Fe(II)/(III).H2O2 is the source reactive oxygen species and hydrogen radicals [52, 53]. Analytical techniques based on CL have been used in, e.g.: pharmacological studies, clinical and environmental diagnostics [14.17, 22.30, 39.47, 62.65]. Ultra-weak intensity of generated emission (1.104 hn ź s.1 ź cm.2) requires very sensitive detectors and special apparatus, as our detection system for CL measurements based on single photon counting [11]. Studies of CL systems characterised by low intensity of the CL emission require the use of sensitizers. Due to their specific luminescence properties, thelanthanide ions, mainly europium(III) and terbium(III) and their complexes, can be successfully used as chemiluminescence fluorophores [11, 57, 71, 75, 76]. Examples of chemiluminescent methods used for determination of organic molecules (aminoacids, antibiotics, chemotherapeutics), based on the lanthanide(III) ions emission, as a result of the energy transfer process from the excited products of the organic molecule oxidation to the Ln(III), are presented [77, 78].