About: UV degradability of aryl-substituted polysilylenes

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Příspěvek studuje odolnost aryl substituovaných polysilanů vůči fotodegradaci UV zářením. Je dokumentována úloha slabých vazeb v metastabilitě i degradačních procesech. (cs) The susceptibility of aryl-substituted polysilylenes to photodegradation by UV radiation at two different degradation wavelength ? = 355 and 266 nm is examined on poly[methyl(phenyl)silylene] (PMPSi), poly[(biphenyl-4-yl)methylsilylene] (PBMSi) and copolymer poly-[methyl(phenyl)silylene{3(4)-[(2,4-dinitrophenylhydrazono)methyl]phenyl}methylsilylene] (PMPSi-DNPH). The photodegradation of PMPSi by UV radiation decreases the intensity of the exciton photoluminescence (PL) band. The temporal dependence is in accord with the idea of the scission of longer Si-Si segments at points of #weak bonds#. Both degradation wavelengths cause the creation of unsaturated bonds of different origin both forming metastable states, susceptible to anneal. In PBMSi and PMPSi-DNPH, the visible photoluminescence first decreased during the degradation by UV radiation, similarly to that as in PMPSi caused by the absorption decrease, but then the rise and saturation of PL was observed. The model for the observed temporal dependen The susceptibility of aryl-substituted polysilylenes to photodegradation by UV radiation at two different degradation wavelength ? = 355 and 266 nm is examined on poly[methyl(phenyl)silylene] (PMPSi), poly[(biphenyl-4-yl)methylsilylene] (PBMSi) and copolymer poly-[methyl(phenyl)silylene{3(4)-[(2,4-dinitrophenylhydrazono)methyl]phenyl}methylsilylene] (PMPSi-DNPH). The photodegradation of PMPSi by UV radiation decreases the intensity of the exciton photoluminescence (PL) band. The temporal dependence is in accord with the idea of the scission of longer Si-Si segments at points of #weak bonds#. Both degradation wavelengths cause the creation of unsaturated bonds of different origin both forming metastable states, susceptible to anneal. In PBMSi and PMPSi-DNPH, the visible photoluminescence first decreased during the degradation by UV radiation, similarly to that as in PMPSi caused by the absorption decrease, but then the rise and saturation of PL was observed. The model for the observed temporal dependen (en)
Title	UV degradability of aryl-substituted polysilylenes UV degradability of aryl-substituted polysilylenes (en) UV degradabilita aryl-substituovaných polysilylenů (cs)
skos:prefLabel	UV degradability of aryl-substituted polysilylenes UV degradability of aryl-substituted polysilylenes (en) UV degradabilita aryl-substituovaných polysilylenů (cs)
skos:notation	RIV/70883521:28110/05:63503764!RIV06-MSM-28110___
http://linked.open.../vavai/riv/strany	297-308
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(1P05ME729), Z(MSM7088352101)
http://linked.open...vai/riv/dodaniDat	2006
http://linked.open...aciTvurceVysledku	Sáha, Petr Kuřitka, Ivo Schauer, František
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Univerzita Tomáše Bati ve Zlíně / Fakulta technologická
http://linked.open...dnocenehoVysledku	548306
http://linked.open...ai/riv/idVysledku	RIV/70883521:28110/05:63503764
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	UV degradation; polysilanes; photoluminescence; metastability (en)
http://linked.open.../riv/klicoveSlovo	UV degradation photoluminescence metastability polysilanes
http://linked.open...ontrolniKodProRIV	[10CD24E775D9]
http://linked.open...v/mistoKonaniAkce	Gothenburg, Sweden
http://linked.open...i/riv/mistoVydani	Karlsruhe
http://linked.open...i/riv/nazevZdroje	Natural and Arteficial Ageing of Polymers
http://linked.open...in/vavai/riv/obor	CD
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...vavai/riv/projekt	Study on synthesis and degradation processes in alkyl and aryl substituted polysilanes for aplication
http://linked.open...UplatneniVysledku	2005
http://linked.open...iv/tvurceVysledku	Kuřitka, Ivo Nešpůrek, Stanislav Schauer, František Sáha, Petr
http://linked.open...vavai/riv/typAkce	WRD - Světová
http://linked.open.../riv/zahajeniAkce	2005-06-16 (xsd:date)
http://linked.open...n/vavai/riv/zamer	Multifunctional Composite Systems Based on Natural and Synthetic Polymers
number of pages	12 (xsd:int)
http://purl.org/ne...btex#hasPublisher	Gesellschaft fuer Umweltsimulation e.V. GUS
https://schema.org/isbn	3-9808382-9-3
http://localhost/t...ganizacniJednotka	28110
is http://linked.open...avai/riv/vysledek of	UV degradability of aryl-substituted polysilylenes

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