VISIBLE AND NEAR INFRARED EMISSION OF POLYMER MATERIALS CONTAINING PORPHYRIN AND ITS YTTERBIUM DERIVATIVE
A series of porphyrin containing polymer materials of various structure was developed. Free 5-(p-aminophenyl)-10,15,20-triphenylporphyrinand its ytterbium derivative were used to prepare materials of different structure and they were obtained by different approaches.Thus, two polymers were used in t...
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| Datum: | 2024 |
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| Hauptverfasser: | , , , , , |
| Format: | Artikel |
| Sprache: | English |
| Veröffentlicht: |
V.I.Vernadsky Institute of General and Inorganic Chemistry
2024
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| Online Zugang: | https://ucj.org.ua/index.php/journal/article/view/641 |
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| Назва журналу: | Ukrainian Chemistry Journal |
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Ukrainian Chemistry Journal| Zusammenfassung: | A series of porphyrin containing polymer materials of various structure was developed. Free 5-(p-aminophenyl)-10,15,20-triphenylporphyrinand its ytterbium derivative were used to prepare materials of different structure and they were obtained by different approaches.Thus, two polymers were used in this study – the poly(methyl methacrylate) (PMMA), polystyrene (PS) as well as their copolymers of different composition (the molar ratio of 0.25/0.75, 0.5/0.5 and 0.75/0.25). Also part of materials were obtained by coprecipitation of polymer(s) with corresponding porphyrin derivative. The latter material ismore transparent, which allows obtaining an absorption spectrum with good resolution. All materials have notable emission characteristics – they emit in visible or near infrared (IR) range. Increasing of PMMA content in the final material causes the increase of fluorescence quantum yield for bothcopolymers and coprecipitatedmaterials.It can be explained by a higher light transmission coefficient of PMMA compared to PS.It was found out that 4f-luminescence in ytterbium-containing materialsdoes not depend on the type of polymer matrix and the variability of its compositionin contrast to fluorescence in the visible range.Almost 100% transparency of the studied polymers in the area of ytterbium ion radiation (980 nm)explains this phenomenon. It was also shown that obtainedmaterialsarestablefora long period of time and they keep the permanence oftheir emission parameters.This phenomenon can be explained by the extraordinary stability of PMMA even to UV radiation and by the high stability of porphyrin molecules. The use of a low concentration (0.1%) of lanthanide-porphyrin in the final material allows the IR emission efficiency of the Yb(III) ion to remain at the same level as in the corresponding methanol solution. |
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