This HTML5 document contains 47 embedded RDF statements represented using HTML+Microdata notation.

The embedded RDF content will be recognized by any processor of HTML5 Microdata.

Namespace Prefixes

PrefixIRI
dctermshttp://purl.org/dc/terms/
n18http://linked.opendata.cz/resource/domain/vavai/riv/tvurce/
n17http://linked.opendata.cz/resource/domain/vavai/projekt/
n20http://linked.opendata.cz/resource/domain/vavai/subjekt/
n6http://linked.opendata.cz/ontology/domain/vavai/
n15http://linked.opendata.cz/resource/domain/vavai/zamer/
shttp://schema.org/
n4http://linked.opendata.cz/ontology/domain/vavai/riv/
skoshttp://www.w3.org/2004/02/skos/core#
n19http://bibframe.org/vocab/
n2http://linked.opendata.cz/resource/domain/vavai/vysledek/
rdfhttp://www.w3.org/1999/02/22-rdf-syntax-ns#
n10http://linked.opendata.cz/ontology/domain/vavai/riv/klicoveSlovo/
n16http://linked.opendata.cz/ontology/domain/vavai/riv/duvernostUdaju/
xsdhhttp://www.w3.org/2001/XMLSchema#
n9http://linked.opendata.cz/resource/domain/vavai/vysledek/RIV%2F61388955%3A_____%2F11%3A00365144%21RIV12-GA0-61388955/
n11http://linked.opendata.cz/ontology/domain/vavai/riv/aktivita/
n5http://linked.opendata.cz/ontology/domain/vavai/riv/jazykVysledku/
n12http://linked.opendata.cz/ontology/domain/vavai/riv/druhVysledku/
n8http://linked.opendata.cz/ontology/domain/vavai/riv/obor/
n14http://reference.data.gov.uk/id/gregorian-year/

Statements

Subject Item
n2:RIV%2F61388955%3A_____%2F11%3A00365144%21RIV12-GA0-61388955
rdf:type
n6:Vysledek skos:Concept
dcterms:description
1H and variable-temperature (15)N NMR techniques have been used to study the effect of the gradual alumination of SBA-15 on the structure and adsorption properties of this mesoporous material. The interpretation of experimental spectra suggests that aluminum chlorhydrol most effectively reacts with silica surfaces in the confinement of the cavities of rough mesopore walls, instead of forming a homogeneous aluminum film. This first leads to a gradual filling of the cavities and finally results in aluminum islands on the inner surfaces of mesopores. In the sample with a Si/Al atomic ratio of 4.1, up to half of the inner surface area of the mesopores is covered with aluminum. The alumination produces Bronsted acid sites attributed to silanol groups interacting with aluminum but does not affect the proton-donating ability of isolated silanol groups. At high Si/Al ratios, the surface contains only one type of Lewis site attributed to tetracoordinated aluminum. 1H and variable-temperature (15)N NMR techniques have been used to study the effect of the gradual alumination of SBA-15 on the structure and adsorption properties of this mesoporous material. The interpretation of experimental spectra suggests that aluminum chlorhydrol most effectively reacts with silica surfaces in the confinement of the cavities of rough mesopore walls, instead of forming a homogeneous aluminum film. This first leads to a gradual filling of the cavities and finally results in aluminum islands on the inner surfaces of mesopores. In the sample with a Si/Al atomic ratio of 4.1, up to half of the inner surface area of the mesopores is covered with aluminum. The alumination produces Bronsted acid sites attributed to silanol groups interacting with aluminum but does not affect the proton-donating ability of isolated silanol groups. At high Si/Al ratios, the surface contains only one type of Lewis site attributed to tetracoordinated aluminum.
dcterms:title
Mutable Lewis and Bronsted Acidity of Aluminated SBA-15 as Revealed by NMR of Adsorbed Pyridine-(15)N Mutable Lewis and Bronsted Acidity of Aluminated SBA-15 as Revealed by NMR of Adsorbed Pyridine-(15)N
skos:prefLabel
Mutable Lewis and Bronsted Acidity of Aluminated SBA-15 as Revealed by NMR of Adsorbed Pyridine-(15)N Mutable Lewis and Bronsted Acidity of Aluminated SBA-15 as Revealed by NMR of Adsorbed Pyridine-(15)N
skos:notation
RIV/61388955:_____/11:00365144!RIV12-GA0-61388955
n6:predkladatel
n20:ico%3A61388955
n4:aktivita
n11:P n11:Z
n4:aktivity
P(GA203/08/0604), P(KAN100400701), Z(AV0Z40400503)
n4:cisloPeriodika
19
n4:dodaniDat
n14:2012
n4:domaciTvurceVysledku
n18:7016662 n18:5283396
n4:druhVysledku
n12:J
n4:duvernostUdaju
n16:S
n4:entitaPredkladatele
n9:predkladatel
n4:idSjednocenehoVysledku
214389
n4:idVysledku
RIV/61388955:_____/11:00365144
n4:jazykVysledku
n5:eng
n4:klicovaSlova
15N NMR; post-synthesis alumination; phase Beckmann rearrangement
n4:klicoveSlovo
n10:post-synthesis%20alumination n10:phase%20Beckmann%20rearrangement n10:15N%20NMR
n4:kodStatuVydavatele
US - Spojené státy americké
n4:kontrolniKodProRIV
[F2254DBD4695]
n4:nazevZdroje
Langmuir
n4:obor
n8:CF
n4:pocetDomacichTvurcuVysledku
2
n4:pocetTvurcuVysledku
5
n4:projekt
n17:KAN100400701 n17:GA203%2F08%2F0604
n4:rokUplatneniVysledku
n14:2011
n4:svazekPeriodika
27
n4:tvurceVysledku
Shenderovich, I, G. Zukal, Arnošt Rozhkova, Yu. A. Gurinov, A. A. Čejka, Jiří
n4:wos
000295187300050
n4:zamer
n15:AV0Z40400503
s:issn
0743-7463
s:numberOfPages
9
n19:doi
10.1021/la2017566