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Statements

Subject Item
n2:RIV%2F67985858%3A_____%2F10%3A00343150%21RIV11-MSM-67985858
rdf:type
skos:Concept n14:Vysledek
dcterms:description
A series of polyallylcarbosilane dendrimers and carbosilane-based dendritic polyols up to third generation was analyzed by means of MALDI-TOF MS and multinuclear NMR to determine the character, origin, and number of structural defects. Several side reactions accompanying hydrosilylation, from which isomerization of terminal double bonds was the most abundant, were detected during the synthesis of carbosilane skeleton. Despite increased steric hindrance, internal double bonds react in subsequent addition reactions. Depending on the synthetic sequence applied, the retained reactivity of the internal double bonds can lead either to suppression of the defect in the next generation or to creation of more significant defects such as dendrimer dimers. Hydroboration of allyl groups using dicyclohexylborane proceeded with near quantitative conversion; a small amount of hydrolysis accompanying the following oxidation step producing nonreactive alkyl groups at the periphery was detected. A series of polyallylcarbosilane dendrimers and carbosilane-based dendritic polyols up to third generation was analyzed by means of MALDI-TOF MS and multinuclear NMR to determine the character, origin, and number of structural defects. Several side reactions accompanying hydrosilylation, from which isomerization of terminal double bonds was the most abundant, were detected during the synthesis of carbosilane skeleton. Despite increased steric hindrance, internal double bonds react in subsequent addition reactions. Depending on the synthetic sequence applied, the retained reactivity of the internal double bonds can lead either to suppression of the defect in the next generation or to creation of more significant defects such as dendrimer dimers. Hydroboration of allyl groups using dicyclohexylborane proceeded with near quantitative conversion; a small amount of hydrolysis accompanying the following oxidation step producing nonreactive alkyl groups at the periphery was detected.
dcterms:title
Structural Defects in Polyallylcarbosilane Dendrimers and Their PolyolDerivatives Characterized by NMR and MALDI-TOF Mass Spectrometry Structural Defects in Polyallylcarbosilane Dendrimers and Their PolyolDerivatives Characterized by NMR and MALDI-TOF Mass Spectrometry
skos:prefLabel
Structural Defects in Polyallylcarbosilane Dendrimers and Their PolyolDerivatives Characterized by NMR and MALDI-TOF Mass Spectrometry Structural Defects in Polyallylcarbosilane Dendrimers and Their PolyolDerivatives Characterized by NMR and MALDI-TOF Mass Spectrometry
skos:notation
RIV/67985858:_____/10:00343150!RIV11-MSM-67985858
n3:aktivita
n13:P n13:Z
n3:aktivity
P(LC06070), Z(AV0Z40500505), Z(AV0Z40720504)
n3:cisloPeriodika
10
n3:dodaniDat
n5:2011
n3:domaciTvurceVysledku
n7:1437380 n7:7290322
n3:druhVysledku
n15:J
n3:duvernostUdaju
n17:S
n3:entitaPredkladatele
n18:predkladatel
n3:idSjednocenehoVysledku
290432
n3:idVysledku
RIV/67985858:_____/10:00343150
n3:jazykVysledku
n8:eng
n3:klicovaSlova
carbosilane dendrimers; maldi-tof ms; structural defects
n3:klicoveSlovo
n6:structural%20defects n6:carbosilane%20dendrimers n6:maldi-tof%20ms
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[819FA4179C9C]
n3:nazevZdroje
Macromolecules
n3:obor
n16:CC
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
4
n3:projekt
n12:LC06070
n3:rokUplatneniVysledku
n5:2010
n3:svazekPeriodika
43
n3:tvurceVysledku
Krupková, Alena Čermák, Jan Walterová, Zuzana Horský, Jiří
n3:wos
000277649500014
n3:zamer
n11:AV0Z40720504 n11:AV0Z40500505
s:issn
0024-9297
s:numberOfPages
9