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

B. Granqvist; G. Hedström; J. B. Rosenholm

doi:10.1016/j.jcis.2009.01.057

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

B. Granqvist, G. Hedström, J. B. Rosenholm^*

^*Tämän työn vastaava kirjoittaja

Tutkimustuotos: Lehtiartikkeli › Artikkeli › Tieteellinen › vertaisarvioitu

8 Sitaatiot (Scopus)

Abstrakti

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 adsorption. The aim is to distinguish between the Lewis-type (electron exchange) and Brønsted-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.

Alkuperäiskieli	Englanti
Sivut	49-57
Sivumäärä	9
Julkaisu	Journal of Colloid and Interface Science
Vuosikerta	333
Numero	1
DOI - pysyväislinkit	https://doi.org/10.1016/j.jcis.2009.01.057
Tila	Julkaistu - 1 toukok. 2009
OKM-julkaisutyyppi	A1 Julkaistu artikkeli, soviteltu

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10.1016/j.jcis.2009.01.057

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@article{67b6925ff8324c2a8e8db8f32f23947d,

title = "Acid-base interaction of probes at silica surface. Microcalorimetry and adsorption",

abstract = "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 adsorption. The aim is to distinguish between the Lewis-type (electron exchange) and Br{\o}nsted-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.",

keywords = "Acid-base interaction, Adsorption, Enthalpy of adsorption, Langmuir isotherm, Lewis acid-base, Microcalorimetry, Silica",

author = "B. Granqvist and G. Hedstr{\"o}m and Rosenholm, {J. B.}",

note = "Funding Information: This research has been funded by the Academy of Finland. Osman Hassan is thanked for help with the experiments. Davison Catalysts Grace is thanked for providing the powder.",

year = "2009",

month = may,

day = "1",

doi = "10.1016/j.jcis.2009.01.057",

language = "English",

volume = "333",

pages = "49--57",

journal = "Journal of Colloid and Interface Science",

issn = "0021-9797",

publisher = "Elsevier",

number = "1",

}

TY - JOUR

T1 - Acid-base interaction of probes at silica surface. Microcalorimetry and adsorption

AU - Granqvist, B.

AU - Hedström, G.

AU - Rosenholm, J. B.

N1 - Funding Information: This research has been funded by the Academy of Finland. Osman Hassan is thanked for help with the experiments. Davison Catalysts Grace is thanked for providing the powder.

PY - 2009/5/1

Y1 - 2009/5/1

N2 - 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 adsorption. The aim is to distinguish between the Lewis-type (electron exchange) and Brønsted-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.

AB - 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 adsorption. The aim is to distinguish between the Lewis-type (electron exchange) and Brønsted-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.

KW - Acid-base interaction

KW - Adsorption

KW - Enthalpy of adsorption

KW - Langmuir isotherm

KW - Lewis acid-base

KW - Microcalorimetry

KW - Silica

UR - http://www.scopus.com/inward/record.url?scp=62349119629&partnerID=8YFLogxK

U2 - 10.1016/j.jcis.2009.01.057

DO - 10.1016/j.jcis.2009.01.057

M3 - Article

AN - SCOPUS:62349119629

SN - 0021-9797

VL - 333

SP - 49

EP - 57

JO - Journal of Colloid and Interface Science

JF - Journal of Colloid and Interface Science

IS - 1

ER -

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

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