New assignment of the signals in 23Na DOR NMR to sodium sites in dehydrated NaY zeolite

H.A.M. Verhulst; W.J.J. Welters; G. Vorbeck; L.J.M. Ven, van de; V.H.J. Beer, de; R.A. Santen, van; J.W. Haan, de

doi:10.1021/j100079a027

New assignment of the signals in 23Na DOR NMR to sodium sites in dehydrated NaY zeolite

H.A.M. Verhulst, W.J.J. Welters, G. Vorbeck, L.J.M. Ven, van de, V.H.J. Beer, de, R.A. Santen, van, J.W. Haan, de

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Abstract

A new assignment of the signals in the 23Na DOR NMR spectra to the different sodium sites in dehydrated NaY zeolite is presented. 23Na DOR and MASNMR measurements of dehydrated NaY, Ca2+-exchanged NaY samples, and NaY samples in which Mo(CO)6 is adsorbed are used for this purpose. Four distinct signals in the 23Na DOR NMR spectra of dehydrated NaY are found: the 1st signal with an isotropic chem. shift of -6 ppm and a quadrupolar coupling const. of 0.4 MHz is assigned to the Na+ cations at site I. The 2nd signal, with an isotropic chem. shift of -12 ppm and a quadrupolar coupling const. of 2.3 MHz, is assigned to the Na+ cations at sites I'/II'. The 3rd and the 4th signals, with isotropic chem. shifts of -4 and 5 ppm and quadrupolar coupling consts. of 4.2 and 4.7 MHz, resp., are assigned to the Na+ cations at sites II and III. [on SciFinder (R)]

Original language	English
Pages (from-to)	7056-7062
Number of pages	7
Journal	Journal of Physical Chemistry
Volume	98
Issue number	28
DOIs	https://doi.org/10.1021/j100079a027
Publication status	Published - 1994

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@article{681a188a7f1746d582ba3e9517e18ad0,

title = "New assignment of the signals in 23Na DOR NMR to sodium sites in dehydrated NaY zeolite",

abstract = "A new assignment of the signals in the 23Na DOR NMR spectra to the different sodium sites in dehydrated NaY zeolite is presented. 23Na DOR and MASNMR measurements of dehydrated NaY, Ca2+-exchanged NaY samples, and NaY samples in which Mo(CO)6 is adsorbed are used for this purpose. Four distinct signals in the 23Na DOR NMR spectra of dehydrated NaY are found: the 1st signal with an isotropic chem. shift of -6 ppm and a quadrupolar coupling const. of 0.4 MHz is assigned to the Na+ cations at site I. The 2nd signal, with an isotropic chem. shift of -12 ppm and a quadrupolar coupling const. of 2.3 MHz, is assigned to the Na+ cations at sites I'/II'. The 3rd and the 4th signals, with isotropic chem. shifts of -4 and 5 ppm and quadrupolar coupling consts. of 4.2 and 4.7 MHz, resp., are assigned to the Na+ cations at sites II and III. [on SciFinder (R)]",

author = "H.A.M. Verhulst and W.J.J. Welters and G. Vorbeck and {Ven, van de}, L.J.M. and {Beer, de}, V.H.J. and {Santen, van}, R.A. and {Haan, de}, J.W.",

year = "1994",

doi = "10.1021/j100079a027",

language = "English",

volume = "98",

pages = "7056--7062",

journal = "Journal of Physical Chemistry",

issn = "0022-3654",

publisher = "American Chemical Society",

number = "28",

}

TY - JOUR

T1 - New assignment of the signals in 23Na DOR NMR to sodium sites in dehydrated NaY zeolite

AU - Verhulst, H.A.M.

AU - Welters, W.J.J.

AU - Vorbeck, G.

AU - Ven, van de, L.J.M.

AU - Beer, de, V.H.J.

AU - Santen, van, R.A.

AU - Haan, de, J.W.

PY - 1994

Y1 - 1994

N2 - A new assignment of the signals in the 23Na DOR NMR spectra to the different sodium sites in dehydrated NaY zeolite is presented. 23Na DOR and MASNMR measurements of dehydrated NaY, Ca2+-exchanged NaY samples, and NaY samples in which Mo(CO)6 is adsorbed are used for this purpose. Four distinct signals in the 23Na DOR NMR spectra of dehydrated NaY are found: the 1st signal with an isotropic chem. shift of -6 ppm and a quadrupolar coupling const. of 0.4 MHz is assigned to the Na+ cations at site I. The 2nd signal, with an isotropic chem. shift of -12 ppm and a quadrupolar coupling const. of 2.3 MHz, is assigned to the Na+ cations at sites I'/II'. The 3rd and the 4th signals, with isotropic chem. shifts of -4 and 5 ppm and quadrupolar coupling consts. of 4.2 and 4.7 MHz, resp., are assigned to the Na+ cations at sites II and III. [on SciFinder (R)]

AB - A new assignment of the signals in the 23Na DOR NMR spectra to the different sodium sites in dehydrated NaY zeolite is presented. 23Na DOR and MASNMR measurements of dehydrated NaY, Ca2+-exchanged NaY samples, and NaY samples in which Mo(CO)6 is adsorbed are used for this purpose. Four distinct signals in the 23Na DOR NMR spectra of dehydrated NaY are found: the 1st signal with an isotropic chem. shift of -6 ppm and a quadrupolar coupling const. of 0.4 MHz is assigned to the Na+ cations at site I. The 2nd signal, with an isotropic chem. shift of -12 ppm and a quadrupolar coupling const. of 2.3 MHz, is assigned to the Na+ cations at sites I'/II'. The 3rd and the 4th signals, with isotropic chem. shifts of -4 and 5 ppm and quadrupolar coupling consts. of 4.2 and 4.7 MHz, resp., are assigned to the Na+ cations at sites II and III. [on SciFinder (R)]

U2 - 10.1021/j100079a027

DO - 10.1021/j100079a027

M3 - Article

SN - 0022-3654

VL - 98

SP - 7056

EP - 7062

JO - Journal of Physical Chemistry

JF - Journal of Physical Chemistry

IS - 28

ER -

New assignment of the signals in 23Na DOR NMR to sodium sites in dehydrated NaY zeolite

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