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Tytuł:
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Oxygen sensing materials based on clay/metalloporphyrin hybrid systems.
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Autorzy:
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Čeklovský, Alexander
Takagi, Shinsuke
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Źródło:
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Central European Journal of Chemistry; Jul2013, Vol. 11 Issue 7, p1132-1136, 5p
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This study was focused on the investigation of novel hybrid organo/inorganic systems for oxygen sensing applications. As a host material, a synthetic clay mineral Sumecton SA was chosen, while, as guest materials, metalloporphyrins containing Pt(II) and Pd(II) were chosen. These are known to be very efficient agents for sensing applications because of a 'heavy atom effect'. This effect promotes a spin-orbit coupling, resulting in the fact that almost all of the radiation from a singlet excited state undergoes intersystem crossing, followed by a de-excitation via a triplet state. The combination of metalloporphyrin and layered materials enables unique oxygen sensing properties due to the steric effects of layered materials. The result is that the emission from the membrane was sensitive at the range around aerobic conditions. The spectroscopic analysis of hybrid systems - clay/porphyrin membranes (CPMs) showed that these materials can serve as prospective candidates for the construction of effective, reliable and economical oxygen sensors. [Figure not available: see fulltext.] [ABSTRACT FROM AUTHOR]
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