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    Wyświetlanie 1-4 z 4
    Tytuł:
    O eksperymentach Michała Jana Borcha (1753–1811) dotyczących chemiluminescencji
    The experiments of Michał Jan Borch (1753–1811) concerning chemiluminescence
    Autorzy:
    Siemion, I. Z.
    Szastyńska-Siemion, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/172774.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Chemiczne
    Tematy:
    Borch Jan Michał
    działalność naukowa
    luminescencja morza
    luminescencja zepsutych mieczników
    M. Borch’s scientific activity
    sea luminescence
    luminescence of decaying swordfish
    Opis:
    In the paper, the scientific activities of Polish scientist Michał Jan Borch (1753–1811) are briefly discussed, The Polish translation of Borch’s article (published in “Atti dell’ Academia della Scienza di Siena” in 1781) on the luminescence of the sea and different ideas on what could cause the phenomenon is presented. The attempts of Borch to isolate the luminescence – generating substance from decaying swordfish are discussed in the light of some later data on the chemiluminescence of organic compounds, Connected to bioluminescence experiments of our other scientists of that time (G. Forster and K. Kortum) are also quoted.
    Źródło:
    Wiadomości Chemiczne; 2013, 67, 3-4; 361-368
    0043-5104
    2300-0295
    Pojawia się w:
    Wiadomości Chemiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Biologiczne zastosowania nanoluminoforów domieszkowanych lantanowcami
    Biological applications of lanthanide doped nanomarkers
    Autorzy:
    Misiak, M.
    Prorok, K.
    Bednarkiewicz, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/172512.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Chemiczne
    Tematy:
    nanoluminofory konwertujące w górę
    luminescencja
    biotest
    zastosowania biomedyczne
    up-converting nanoparticles
    luminescence
    bioassays
    biomedical applications
    Opis:
    Fluorescence is one of the most commonly used methods of biodetection, mainly due to the high sensitivity, non-invasiveness, simplicity, and also due to the availability of the whole range of powerful light sources, a wide range of photodetectors, and numerous and sensitive measuring methods. From the point of view of biodetection and bioimaging, the important characteristics of such fluorophores are large Stokes shift, narrow absorption/emission lines as well as stable and efficient luminescence. Traditional organic dyes applied in biology reveal very fast photobleaching and limited opportunities for simultaneous detection of many biomolecules, what stimulate development of new fluorescent markers. Fast and intensive development of nanotechnology and chemical engineering observed in recent years, aims at designing the nanophosphors or luminescent nanoplatforms, that demonstrate desirable properties and devised functionality. However, new phosphors are not included yet in broad practical applications, mainly because of the need to adapt the measuring apparatus so as to fully exploit their potential. From among the fluorescent nano-particles, silica dye doped nanoparticles, quantum dots, nanocolloidal metallic nanoparticles, and lanthanide doped nanoluminophores show the largest application potential. This article discusses the unique physico-chemical properties of lanthanide doped nanoparticles, which beside very long luminescence lifetimes and narrow emission bands, enable to obtain a visible emission under the near infrared photoexcitation (called anti-Stokes emission), offering improved sensitivity, stability, repeatability and accuracy of the fluorescent biodetection and bioimaging methods. In this review, physico-chemical properties of lanthanide doped nanoluminophores and many examples of their biological applications have been discussed. The first chapter presents spectral characteristics of rare-earth ions with particular regard to the mechanism of energy transfer and up-conversion, which is a fundamental difference and the decisive advantage compared with other known fluorescent markers. The luminescent properties of lantanides are demonstrated based on the most commonly used nanomaterials singly doped with Eu^3+ and Tb^3+ and the codoped matrices, like Yb^3+-Tm^3+, Yb^3+-Er^3+or Yb^3+-Ho^3+ co-doped phosphores. The features of these materials are best suited from the point of view of biodetection and bioimaging. The next chapter gives an overview of the applications of lanthanide doped nanoluminophores in biological sciences. Different types of hetero-/homo-genous tests and luminesce based sensors for pH, CO_2, the level of glucose, and other analytes are presented. Then, basic aspects of bioimaging, photodynamic and thermo-therapy, nanotermometry as well as nano-bio-technology platforms have been summarized. In conclusion suggestions of new research directions and new biological applications of lanthanide doped nanoparticles have been presented.
    Źródło:
    Wiadomości Chemiczne; 2012, 66, 5-6; 393-443
    0043-5104
    2300-0295
    Pojawia się w:
    Wiadomości Chemiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Luminescencyjne sensory tlenu, ciśnienia i temperatury
    Oxygen, pressure and temperature luminescent sensors
    Autorzy:
    Tsvirko, M.
    Kalota, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/171947.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Chemiczne
    Tematy:
    luminescencja
    metaloporfiryny
    kompleksy europu
    sensory tlenu
    sensory ciśnienia
    sensory temperatury
    luminescence
    metalloporphyrins
    europium complexes
    oxygen sensors
    pressure sensors
    temperature sensors
    Opis:
    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.
    Źródło:
    Wiadomości Chemiczne; 2011, 65, 11-12; 1069-1097
    0043-5104
    2300-0295
    Pojawia się w:
    Wiadomości Chemiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Porfiryny zamknięte w żelu krzemionkowym
    Porphyrins closed in sol-gel matrix
    Autorzy:
    Wiglusz, R. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/172034.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Chemiczne
    Tematy:
    porfiryny
    pochodne porfiryn
    jony lantanowców
    spektroskopia UV-VIS
    luminescencja
    zol-żel
    porphyrins
    porphyrin derivatives
    lanthanide(III) ions
    UV-Vis spectroscopy
    luminescence
    sol-gel
    Opis:
    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.
    Źródło:
    Wiadomości Chemiczne; 2011, 65, 7-8; 675-703
    0043-5104
    2300-0295
    Pojawia się w:
    Wiadomości Chemiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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