Spectroscopic Comparison of the Proton-Attracting Properties of Liquids

Gordy, Walter

doi:10.1063/1.1750399

Cited by 105 publications

(31 citation statements)

References 23 publications

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“…Thus the constituent has a greater chance to attack adsorption sites responsible for the swelling of wood than that expected in pure concentration. Gordy (1939Gordy ( , 1941 made some of the best correlations for swelling of wood in organic liquids. These were based on the tendency of the liquid to form hydrogen bonds with methanol.…”

Section: Woodmentioning

confidence: 99%

Swelling of wood

1994

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The rate and maximum swelling of several North American wood species in water have been obtained with a computer interfaced linear variable displacement transformer. Since wood swells extremely fast in water even at room temperature, this apparatus made it possible for the first time, to obtain accurate rate data on the swelling of wood in water. The strict linear dependence of swelling on the temperature suggests a chemical mechanism. The activation energies obtained from Arrhenius plots ranged from 32.2 KJ/mole for sitka spruce to 47.6 KJ/mole for sugar maple. Although the two hardwoods exhibited greater maximum tangential swelling compared with the two softwoods, the maximum swelling appears to be correlated with the wood density. Generally both the rate and maximum swelling of the woods were increased by removal of extractives and the activation energies were reduced.

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Section: Woodmentioning

confidence: 99%

Swelling of wood

1994

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“…In studying the deuteron-attracting properties of liquids by infrared pec troscopy, Gordy and his collaborators [78,79] measured the shift of the OD band of heavy methyl alcohol, CHaOD, or heavy water, DzO. Benzene was used as r eference solvent for CHaOD or D zO.…”

Section: Acid-base Reactions In Organic Solventsmentioning

confidence: 99%

Acid-base reactions in benzene and other organic solvents: Behavior of bromphthalein magenta with different classes of organic bases

Davis¹,

Schuhmann²

1947

J. RES. NATL. BUR. STAN.

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Practical and theoretica l aspects of acid-base reactions in benzene and other organic solvents al'e discussed . The synthesis of the indicators bromphtha lein magenta E and B (the ethyl and n-butyl esters of t etrabromopheno lph thale in ) an d of their t etraalkylammonium salts is descri bed. Qualitative and spectrophotometric data concern in g the color reactions of the indicators with primary, seconda ry, and t ertia ry a li phatic amines , s ubstituted guan idines, a nd other n itrogen bases in benz ene and other types of organic solvents are presen ted. An expla nati on off ered for the color phenom ena is also appli cable to ulfon ephthalcins and other indicators.Examples are given of the qu antitative m eas urement of the relative reactivity of bases with bromphthal ein magenta in benzene. Illust rations a re furnishe d of the app li cation of the ind icato rs to the quantitative estimation of acids and bases, to measu rem ents of the relative s trengt,h s of orga ni c acids, and to the differen tiation o f primary, secondary, and tertiary a liphatic a mines.During t he sp ectrophotometric inves t igations, it was necessar y to des ign new types of a bsorption cells s uitable fo r vo latile solvents a nd for th in laye rs of solu t ion. A desc ription of the e cells is given.

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“…53 / 1999 / No. 6 Kagiya et al (1968) and from Gordy (1939). b) Liquids having both proton-accepting and -donating properties for hydrogen bonding.…”

Section: Temperature Dependence Of Activitymentioning

confidence: 99%

Adsorption of Liquids and Swelling of Wood IV. Temperature Dependence on the Adsorption

Morisato¹,

Kotani²,

Ishimaru³

et al. 1999

Holzforschung

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For the purpose of understanding the swelling phenomenon of wood in liquids, the contributions of enthalpic and entropic terms to the standard free energy change of adsorption have been determined by measuring the temperature dependence of adsorption isotherms. The values of standard enthalpy change of adsorption are smaller for alcohols having both proton-accepting and -donating properties than for acetone having only a proton-accepting property. The results are discussed in terms of the proton-accepting power and the cohesive energy of the respective adsorbate liquids. Methanol showed a larger isosteric heat of adsorption to dried wood than to pre-swollen wood, and the amounts of methanol and acetone adsorbed on dried wood exceeded those on swollen wood within the low activity range. These results indicate the presence of more exothermic sites in dried wood than in pre-swollen wood, and of pre-existing spaces and/or parts loosely hydrogen-bonded between wood constituents in the cell walls of dried wood. KeywordsAdsorption Organic liquids Temperature dependence Standard free energy change Standard enthalpy change Standard entropy change Isosteric heat Brought to you by |

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Spectroscopic Comparison of the Proton-Attracting Properties of Liquids

Cited by 105 publications

References 23 publications

Swelling of wood

Swelling of wood

Acid-base reactions in benzene and other organic solvents: Behavior of bromphthalein magenta with different classes of organic bases

Adsorption of Liquids and Swelling of Wood IV. Temperature Dependence on the Adsorption

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