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Titolo:
Highly resolved Al-27 NMR spectra of aluminosilicate solutions
Autore:
Samadi-Maybodi, A; Azizi, SN; Naderi-Manesh, H; Bijanzadeh, H; McKeag, IH; Harris, RK;
Indirizzi:
Mazandaran Univ, Fac Basic Sci, Dept Chem, Babolsar, Iran Mazandaran UnivBabolsar Iran Fac Basic Sci, Dept Chem, Babolsar, Iran Univ Durham, Dept Chem, Durham DH1 3LE, England Univ Durham Durham England DH1 3LE m, Dept Chem, Durham DH1 3LE, England Tarbiet Modarress Univ, Tehran, Iran Tarbiet Modarress Univ Tehran IranTarbiet Modarress Univ, Tehran, Iran
Titolo Testata:
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS
fascicolo: 5, , anno: 2001,
pagine: 633 - 638
SICI:
1472-7773(2001):5<633:HRANSO>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
CRYSTALLINE TETRAMETHYLAMMONIUM-ALUMINOSILICATES; NUCLEAR-MAGNETIC-RESONANCE; AQUEOUS SILICATE SOLUTIONS; GERMANOSILICATE SOLUTION; SI-29; ALUMINUM; SPECTROSCOPY; ANION; RELAXATION; CAGES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
26
Recensione:
Indirizzi per estratti:
Indirizzo: Harris, RK Mazandaran Univ, Fac Basic Sci, Dept Chem, POB 311, Babolsar, Iran Mazandaran Univ POB 311 Babolsar Iran POB 311, Babolsar, Iran
Citazione:
A. Samadi-Maybodi et al., "Highly resolved Al-27 NMR spectra of aluminosilicate solutions", J CHEM S DA, (5), 2001, pp. 633-638

Abstract

The first highly resolved Al-27 NMR spectra of alkaline aluminosilicate solutions have been recorded and are discussed. The linewidths and number of resolved lines are shown to depend critically on several factors, especially the pH and Si:Al ratio. At least thirteen separate peaks or bands are observed at pH approximate to 10.35 and Si:Al=1:1. A substantial range of anionic species, comparable to those found for alkaline silicate solutions, is thus shown to exist in dynamic equilibrium. Tentative assignments of some bands are presented, based on Al-27 and Si-29 shift comparability, Al-27 linewidths and Al-27 spin-lattice relaxation measurements. Relative intensities of the various Al-27 signals are given for the pH approximate to 10.35 solution.

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Documento generato il 02/04/20 alle ore 01:00:02