Acid-base interaction of probes at silica surface. Microcalorimetry and adsorption

被引：8

作者：

Granqvist, B. ^{[1
,2
]}

Hedstrom, G. ^{[1
]}

Rosenholm, J. B. ^{[1
]}

机构：

[1] Abo Akad Univ, Dept Phys Chem, Ctr Excellence Funct Mat, FIN-20050 Turku, Finland

[2] Grad Sch Mat Res, Turku, Finland

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2009年 / 333卷 / 01期

基金：

芬兰科学院;

关键词：

Adsorption; Enthalpy of adsorption; Acid-base interaction; Langmuir isotherm; Microcalorimetry; Silica; Lewis acid-base; AMORPHOUS SILICA; BRONSTED-ACID; NMR; ALUMINA; TEMPERATURE; DESORPTION; CHEMISTRY; AMMONIA; SITES; SCALE;

D O I：

10.1016/j.jcis.2009.01.057

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The interaction of four benzyl derivatives with Silica Surface sites in anhydrous cyclohexane is investigated. The strength and extent of adsorption is determined from the Langmuir adsorption isotherm. The enthalpy of immersion is determined microcalorimetrically, which is recalculated to the enthalpy of ad, sorption. The aim is to distinguish between the Lewis-type (electron exchange) and Bronsted-type (proton exchange) of interaction by selecting methanol-acetone and acetic acid-methylamine, respectively as acid-base substituent in benzene. Moreover, the experiments were performed in anhydrous cyclohexane in order to screen out hydrocarbon interactions from the energy balance. The monomolecular adsorption is also distinguished from the bulk wetting of solids. The results are evaluated in terms of possible proton exchange in anhydrous media. (C) 2009 Elsevier Inc. All rights reserved.

引用

页码：49 / 57

页数：9

共 39 条

[1]

[Anonymous], MINERALS METALLURGIC

[2]

[Anonymous], ACID BASE INTERACTIO

[3] SURFACE-ACIDITY BASICITY OF ROAD STONE AGGREGATES BY ADSORPTION FROM NONAQUEOUS SOLUTIONS [J].

ARDEBRANT, H ;

PUGH, RJ .

COLLOIDS AND SURFACES, 1991, 53 (1-2) :101-116

[4]

Atkins P., 1998, Physical Chemistry

[5]

Bäckman J, 2000, ACID-BASE INTERACTIONS: RELEVANCE TO ADHESION SCIENCE AND TECHNOLOGY, VOL 2, P465

[6] P-31 NMR-STUDY OF TRIALKYLPHOSPHINE PROBES ADSORBED ON SILICA-ALUMINA [J].

BALTUSIS, L ;

FRYE, JS ;

MACIEL, GE .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1987, 109 (01) :40-46

[7] SURFACE-CHEMISTRY OF SILICON-NITRIDE POWDERS - ADSORPTION FROM NONAQUEOUS SOLUTIONS [J].

BERGSTROM, L .

COLLOIDS AND SURFACES, 1992, 69 (01) :53-64

[8]

Chehimi MM, 2000, ACID-BASE INTERACTIONS: RELEVANCE TO ADHESION SCIENCE AND TECHNOLOGY, VOL 2, P275

[9] CORRELATION BETWEEN THE ISOELECTRIC POINT OF SOLID-SURFACES OF METAL-OXIDES AND X-RAY PHOTOELECTRON-SPECTROSCOPY CHEMICAL-SHIFTS [J].

DELAMAR, M .

JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 1990, 53 (03) :C11-C14

[10]

Della Volpe C, 1997, J COLLOID INTERF SCI, V195, P121

← 1 2 3 4 →