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Complex Analysis of the Aluminum Siting in the Framework of Silicon-Rich Zeolites. A Case Study on Ferrierites

SYSNO ASEP	0360036
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Complex Analysis of the Aluminum Siting in the Framework of Silicon-Rich Zeolites. A Case Study on Ferrierites
Author(s)	Dědeček, Jiří (UFCH-W)_{RID, ORCID} Lucero, Melissa Jeanine (UFCH-W) Li, Chengbin (UFCH-W) Gao, Fei (UFCH-W) Klein, Petr (UFCH-W)_{RID, ORCID} Urbanová, Martina (UFCH-W) Tvarůžková, Zdenka (UFCH-W)_RID Sazama, Petr (UFCH-W)_{RID, ORCID} Sklenák, Štěpán (UFCH-W)_{RID, ORCID, SAI}
Source Title	Journal of Physical Chemistry C. - : American Chemical Society - ISSN 1932-7447 Roč. 115, č. 22 (2011), s. 11056-11064
Number of pages	9 s.
Language	eng - English
Country	US - United States
Keywords	ferrierites ; zeolites ; aluminosilicates
Subject RIV	CF - Physical ; Theoretical Chemistry
R&D Projects	IAA400400812 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR)
	IAA400400908 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR)
	IAA400400904 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR)
	GA203/09/1627 GA ČR - Czech Science Foundation (CSF)
	GP203/08/P593 GA ČR - Czech Science Foundation (CSF)
	KAN100400702 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR)
CEZ	AV0Z40400503 - UFCH-W (2005-2011)
UT WOS	000291079900018
DOI	10.1021/jp200310b
Annotation	We present a multistep method combining multispectroscopic experiments with DFT calculations to determine the complete Al distribution in silicon-rich zeolites, independent of the presence of Al–O–(Si–O)n–Al (n = 1, 2) sequences in their frameworks. 29Si MAS NMR spectroscopy is employed to confirm the absence of Al–O–Si–O–Al in the framework of silicon-rich zeolites while 27Al 3Q MAS NMR spectroscopy and DFT computations of 27Al isotropic chemical shifts serve to determine the locations of isolated Al atoms. The maximum ion-exchange capacity of zeolites for [Co2+(H2O)6]2+ reveals the presence of close Al atoms (i.e., those Al atoms which are able to balance [Co2+(H2O)6]2+ ions). Then visible spectroscopy of the bare Co(II) ion in the dehydrated zeolite of the samples with close Al is utilized to identify the locations of the corresponding Al–O–(Si–O)2–Al pairs in a ring.
Workplace	J. Heyrovsky Institute of Physical Chemistry
Contact	Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196
Year of Publishing	2012

Number of the records: 1