Silicon-29 NMR studies of tetraalkylammonium silicate solutions.: 1.: Equilibria, 29Si chemical shifts, and 29Si relaxation

被引：98

作者：

Kinrade, SD ^{[1
]}

Knight, CTG

Pole, DL

Syvitski, RT

机构：

[1] Lakehead Univ, Dept Chem, Thunder Bay, ON P7B 5E1, Canada

[2] Univ Illinois, Sch Chem Sci, Urbana, IL 61801 USA

来源：

INORGANIC CHEMISTRY | 1998年 / 37卷 / 17期

关键词：

D O I：

10.1021/ic971629e

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The addition of tetraalkylammonium cations to aqueous silicate solutions enhances the abundance of symmetric, cagelike, polysilicate anions including the cubic octamer, Si8O208-. The equilibrium ratio of tetramethylammonium (TMA) cations to the octameric silicate anion is 8:1 for solutions with a concentration ratio [OH-]:[Si] greater than or equal to 1:1. Evidence indicates that organocations directly associate with cagelike polyanions to form a protective shell of hydrophobic hydration that impedes hydrolysis of the central anion.

引用

页码：4272 / 4277

页数：6

共 45 条

[1] A SIMPLE MULTI-NUCLEAR NMR THERMOMETER [J].

AMMANN, C ;

MEIER, P ;

MERBACH, AE .

JOURNAL OF MAGNETIC RESONANCE, 1982, 46 (02) :319-321

[2]

Ando I., 1983, THEORY NMR PARAMETER

[3] HYDROTHERMAL CHEMISTRY OF SILICATES .9. NITROGENOUS ALUMINOSILICATES [J].

BARRER, RM ;

DENNY, PJ .

JOURNAL OF THE CHEMICAL SOCIETY, 1961, (MAR) :971-&

[4] A NEW FAMILY OF MESOPOROUS MOLECULAR-SIEVES PREPARED WITH LIQUID-CRYSTAL TEMPLATES [J].

BECK, JS ;

VARTULI, JC ;

ROTH, WJ ;

LEONOWICZ, ME ;

KRESGE, CT ;

SCHMITT, KD ;

CHU, CTW ;

OLSON, DH ;

SHEPPARD, EW ;

MCCULLEN, SB ;

HIGGINS, JB ;

SCHLENKER, JL .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1992, 114 (27) :10834-10843

[5] IDENTIFICATION OF A DOUBLE 5-RING SILICATE, A POSSIBLE PRECURSOR IN THE SYNTHESIS OF ZSM-5 [J].

BOXHOORN, G ;

SUDMEIJER, O ;

VANKASTEREN, PHG .

JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 1983, (23) :1416-1418

[6]

Davis ME, 1995, STUD SURF SCI CATAL, V97, P35

[7]

Davis ME, 1997, CHEM IND-SER, V69, P1

[8]

DEFREITAS ASW, 1991, CAN J CHEM, V69, P611

[9]

ENGELHARDT G, 1983, Z CHEM, V23, P33

[10] APPARENT MOLAL VOLUMES AND EXPANSIBILITIES OF ELECTROLYTES IN DILUTE AQUEOUS SOLUTION [J].

FRANKS, F ;

SMITH, HT .

TRANSACTIONS OF THE FARADAY SOCIETY, 1967, 63 (539P) :2586-&

← 1 2 3 4 5 →