The Chemistry of Detrital Aluminum in Zeolites Studied by Multinuclear NMR Spectroscopy and Other Techniques

1987 ◽  
Vol 111 ◽  
Author(s):  
Richard H. Jarman
Keyword(s):  
Nmr Spectroscopy ◽  
Thermogravimetric Analysis ◽  
High Resolution ◽  
Nmr Spectra ◽  
Compositional Data ◽  
Analysis Data ◽  
State Of Charge ◽  
Zeolite Framework ◽  
Multinuclear Nmr Spectroscopy ◽  
Type Zeolite

AbstractHigh resolution 27Al NMR spectroscopy has been used to study the dealumination of the A-type zeolite ZK4. The aluminum removed from the lattice during calcination undergoes reversible changes in coordination when treated in acidic and basic media. 2 5 Si NMR spectroscopy reveals that the changes are confined to the detrital aluminum species and do not affect the zeolite framework. Thermogravimetric analysis data combined with compositional data available from 29Si NMR spectra have been used to probe the state of charge of the detrital aluminum species and the nature of defects present in the lattice.

Unusual Rearrangement of Naphthalene in the Synthesis of a Novel B8-B8-Bridged Derivative in the [(1,2-C2B9H11)2-3-Co]- Series. X-Ray Structure and 11B NMR Spectra of [8,8'-μ-(CH2-C9H6)-(1,2-C2B9H10)2-3-Co]- (CH3)4N+

1997 ◽  
Vol 62 (5) ◽  
pp. 746-751 ◽  
Author(s):  
Andreas Franken ◽  
Jaromír Plešek ◽  
Christiane Nachtigal
Keyword(s):  
Nmr Spectroscopy ◽  
Single Crystal ◽  
Nucleophilic Substitution ◽  
Nmr Spectra ◽  
X Ray Diffraction ◽  
X Ray ◽  
Unusual Rearrangement ◽  
Multinuclear Nmr Spectroscopy ◽  
11B Nmr ◽  
Isolated Compound

On treatment of the [(1,2-C2B9H11)2Co]- ion with naphthalene in presence of AlCl3 a remarkably bridged [8,8'-μ-(CH2-C9H6)-(1,2-C2B9H10)2-3-Co]- ion is obtained as a single isolated compound. The triatomic -CH2-C9H6- bridge is derived from the rearranged naphthalene nucleus. The mechanism of this reaction is obscure but it does resemble the "Electrophile-Induced Nucleophilic Substitution" reported earlier. The structure of the compound was established by multinuclear NMR spectroscopy and by single crystal X-ray diffraction.

Ultrafast high-resolution magic-angle-spinning NMR spectroscopy

The Analyst ◽  
2015 ◽  
Vol 140 (12) ◽  
pp. 3942-3946 ◽  
Author(s):  
Marion André ◽  
Martial Piotto ◽  
Stefano Caldarelli ◽  
Jean-Nicolas Dumez
Keyword(s):  
Nmr Spectroscopy ◽  
High Resolution ◽  
Nmr Spectra ◽  
Magic Angle Spinning ◽  
Mas Nmr ◽  
Magic Angle ◽  
Solid Samples ◽  
Semi Solid ◽  
Angle Spinning

The acquisition of ultrafast high-resolution magic-angle spinning (HR-MAS) NMR spectra of semi-solid samples is demonstrated.

scholarly journals Host–Guest and Guest–Guest Interactions of P- and N-Containing Structure Directing Agents Entrapped inside MFI-Type Zeolite by Multinuclear NMR Spectroscopy

2019 ◽  
Vol 123 (36) ◽  
pp. 22324-22334 ◽  
Author(s):  
Joaquin Martinez-Ortigosa ◽  
Jorge Simancas ◽  
J. Alejandro Vidal-Moya ◽  
Philippe Gaveau ◽  
Fernando Rey ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Multinuclear Nmr ◽  
Multinuclear Nmr Spectroscopy ◽  
Type Zeolite ◽  
Structure Directing Agents

scholarly journals Achieving high resolution and optimizing sensitivity in spatial frequency encoding NMR spectroscopy: from theory to practice

2016 ◽  
Vol 18 (33) ◽  
pp. 22827-22839 ◽  
Author(s):  
Bertrand Plainchont ◽  
Daisy Pitoux ◽  
Ghanem Hamdoun ◽  
Jean-Michel Ouvrard ◽  
Denis Merlet ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
High Resolution ◽  
Spatial Frequency ◽  
Detailed Analysis ◽  
Nmr Spectra ◽  
Theory To Practice ◽  
Frequency Encoding

A detailed analysis of NMR spectra based on spatial frequency encoding is presented.

scholarly journals High resolution-1Н NMR spectroscopy of oral liquid in young patients with wedge-shaped lesions

2021 ◽  
Vol 18 (4) ◽  
pp. 20-25
Author(s):  
A. V. Mitronin ◽  
E. A. Srebnaya ◽  
V. I. Privalov ◽  
A. A. Prokopov
Keyword(s):  
Acetic Acid ◽  
Nmr Spectroscopy ◽  
High Resolution ◽  
Nmr Spectra ◽  
Young Patients ◽  
Treatment Method ◽  
Spectra Analysis ◽  
Oral Rinse ◽  
Before And After ◽  
Oral Liquid

Aim. The comparison of saliva 1Н NMR spectra in patients with wedge-shaped lesions before and after treatment.Materials and methods. Saliva as a study material was taken from patients with wedge-shaped lesions before and after treatment. The treatment method was remineralizing therapy that included the use of the oral rinse containing zinchydroxyapatite. 1Н NMR spectroscopy was chosen as an investigation method.Results. In most cases it is noted that after treatment the content of propionic and butyric acids was on the rise in relation of acetic acid. Overall concentration of 1Н protons didn't change significantly.Conclusions. 1Н NMR spectra analysis shows organic acid distribution in oral liquid before and after treatment, which helps to evaluate its response.

Suspension NMR Spectroscopy of Phosphines and Carbonylnickel Complexes Immobilized on Silica

1995 ◽  
Vol 50 (11) ◽  
pp. 1723-1728 ◽  
Author(s):  
K. D. Behringer ◽  
J. Bliimel
Keyword(s):  
Nmr Spectroscopy ◽  
High Resolution ◽  
Nmr Spectra ◽  
Solvent Polarity ◽  
Mas Nmr ◽  
Solvent Viscosity ◽  
Alkyl Chains ◽  
High Resolution Nmr ◽  
Cp Mas Nmr ◽  
Nmr Signals

The 31P suspension NMR spectra o f silica-immobilized bifunctional phosphines and their di- and tricarbonylnickel complexes were recorded using conventional high resolution NMR equipment. The practical advantages of suspension NMR spectroscopy, as compared to 31P CP/MAS NMR spectroscopy, are discussed. General tendencies are demonstrated: The suspension NMR signals become broader with increasing solvent viscosity and decreasing solvent polarity. Phenyl groups as spacers lead to broader resonances than alkyl chains. The linewidths increase in the case of chelation.

Zinn(IV)-Verbindungen mit Ferrocenylchalkogenat- und Ferrocenylendichalkogenat-Liganden. Synthese und Multikern-NMR-Spektroskopie / Tin(IV) Compounds Containing Ferrocenyl Chalcogenate and Ferrocenylene Dichalcogenate Ligands. Synthesis and Multinuclear NMR Spectroscopy

1993 ◽  
Vol 48 (7) ◽  
pp. 940-950 ◽  
Author(s):  
Max Herberhold ◽  
Michaela Hübner ◽  
Bernd Wrackmeyer
Keyword(s):  
Nmr Spectroscopy ◽  
Systematic Study ◽  
Nmr Spectra ◽  
Chemical Shifts ◽  
Spiro Compounds ◽  
Coupling Constants ◽  
Solution Nmr ◽  
Multinuclear Nmr Spectroscopy ◽  
Cp Mas Nmr ◽  
Sulfur Containing

A series of tin(IV) compounds containing ferrocenyl chalcogenate (FcE) and ferrocenylene dichalcogenate (fcE2) ligands (E = S, Se, Te) has been synthesized for a systematic study of the NMR spectra with particular emphasis on 13C, 119Sn, 77Se and 125Te NMR. All compounds are formally derived from tetramethylstannane, SnMe4, by stepwise replacement of methyl by either FcE or fcE2 ligands. Starting from lithioferrocene the products are tetrasubstituted stannanes Me4-nSn(EFc)n (n = 1 and 2, E = S, Se, Te; n = 3 and 4, E = S, Se). Starting from 1,1′dilithioferrocene, the products are 1,1′-disubstituted ferrocenes such as fc(E-SnMe3)2 (E = S, Se, Te), although 1,3-dichalcogena[3]ferrocenophane rings are formed whenever possible to give [3]ferrocenophanes fcE2SnMe2 (E = S, Se, Te) and fc[E-Sn(Me)E2fc]2 (E = S, Se) or tin spiro compounds Sn(E2fc)2 (E = S, Se, Te). Whereas all (8) possible sulfur-containing and all (8) selenium-containing products were accessible, some of the tellurium-rich compounds could not be isolated due to preferred formation of either Fc2Te2 or fcTe3.All compounds were characterized on the basis of their 1H, 13C, 119Sn and, if possible, 77Se and 125Te solution NMR spectra. In many cases, coupling constants such as 2J(119Sn1H), nJ(119Sn13C) (n = 1,2,3), 1J(119Sn77Se) and 1J(125Τe119Sn), 1J(77Se13C) and 1J(125Te13C) could be determined. The δ119Sn chemical shifts of analogous phenyl and ferrocenyl compounds, Me4-nSn(EPh) and Me4-nSn(EFc)n (n = 0-4, E = S, Se, Te), are discussed, and for a microcrystalline sample of tetrakis(ferrocenylselenolato)stannane, Sn(SeFc)4, the 119Sn and 77Se CP/MAS NMR spectra are reported and compared with the solution spectra.

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