W przeglądzie zaprezentowano charakterystykę luminoforów i matryc polimerowych najczęściej stosowanych w konstrukcji współczesnych pojedynczo, podwójnie i potrójnie luminoforowych sensorów luminescencyjnych. Omówiono również mechanizmy działania oraz zastosowanie tych sensorów.
EN
In this review, characteristics of luminophores and polymer matrices the most often used in contemporary single, double and triple luminophore luminescent sensors was presented. Operation mechanisms and application of these sensors were discussed, as well.
W przeglądzie zaprezentowano charakterystykę powszechnie stosowanych metod kalibracji współczesnych pojedynczo, podwójnie i potrójnie luminoforowych sensorów luminescencyjnych. Omówiono również główne metody separacji sygnałów współczesnych podwójnie i potrójnie luminoforowych sensorów luminescencyjnych.
EN
In this review, characteristics of commonly used calibration methods in contemporary single, double and triple luminophore luminescent sensors was presented. Main signal separation methods of contemporary double and triple luminophore luminescent sensors were discussed, as well.
Optical chemical sensors enlarge the definition of a classical chemical sensor; they present results in two-dimensional (2D) or three-dimensional (3D) aspect. They can determine parameters of micro and macro scale objects without using a lot of electronic equipment. This article is focused on sensors based on porphyrin derivatives and europium complexes, being the most frequently used substances sensitive to oxygen concentration, pressure and temperature changes. Along with the presentation of characteristics of substances employed to sensors’ construction, also the general principle of luminescent sensors operation, composition and operation range of selected mono- and bifunctional luminescent sensors are described; moreover the selected achievements, such as the “traffic light” sensor are shown.
Chitozan jest naturalnym polimerem wykorzystywanym w wielu dziedzinach. Jest materiałem biodegradowalnym, biokompatybilnym oraz posiada właściwości bakteriobójcze. Wytworzono warstwy na bazie octanu chitozanu domieszkowanego kompleksem Eu⁺³ ((Eu(TTA)₃ DAPM, TTA - enol pochodny 2-tienoilotrifluoroacetonu, DAPM - [anti-(dipyrylo)]n-propylometan). W celu poznania właściwości nowo syntetyzowanego materiału przeprowadzono badania absorpcyjne, luminescencyjne oraz elektryczne. Zbadano jak zmienia się wydajność kwantowa luminescencji oraz przewodnictwo elektryczne tego polimeru wraz ze zmianą temperatury. Wyniki wskazują na możliwość skonstruowania przyjaznego środowisku bioczujnika temperatury.
EN
Chitosan is a natural polymer used in various application areas. It is biodegradable, biocompatible material having antibacterial properties. Chitosan films prepared were doped with Eu⁺³ complex ((Eu(TTA)₃ DAPM, TTA - thenoyltrifluoroacetone, DAPM - diantipyrylpropylmethane). Various optical, luminescence and electrical properties of this material were measured. The dependence of luminescence quantum efficiency and electrical conductivity of the polymer on temperature was studied. Obtained results indicate the possibility of constructing environmentally friendly temperature biosensor.
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The absolute quantum yield and lifetime of 5Do → 7Fj luminescence of Eu3+ ion in europium complexes with fluorinated β diketones has been measured on excitation of luminescence in the UV So → Si absorption band of the ligand in the temperature range 77-365 K. Based on the analysis of the experimental dependences obtained and solution of the balance equations for stationary and nonstationary cases, we have developed a new approach to the determination of the scheme and rate constants of actual transitions. The rate constants of all processes of electron excitation energy conversion have been determined. The role of the state with charge transfer in these processes has been revealed.
Magnesium(II), barium(II), zinc(II), copper(II), lanthanum(III) and aluminium(III) complexes with 3-phenyl-1-methylpyrazolo[3,4-b]quinlino-6-carboxylic acid (HPQ) were stud ied by IR and EPR methods, TG-DSC ther mal analysis, powder X-ray method, absorption and fluorescence spectroscopy. The IR spectra suggest that the carboxylate ligand acts as mono- or bidentate species. EPR spectra indi ate the dimerization of copper(II) complex. During thermal decomposition the hy drated complexes lose all the crystallization and coordination water molecules and decompose gradually to oxides, and to BaCO3 in the case of barium(II) complex. The powder fluorescence spectra in dicated the differences in emission of ligand and zinc(II), magnesium(II), aluminium(III) and copper(II) complexes.