Hydrogen Bonding. II. Phenol Interactions with Substituted Pyridines<sup>1a</sup>

Rubin, Jerome; Panson, Gilbert S.

doi:10.1021/j100893a045

Cited by 58 publications

(22 citation statements)

References 5 publications

(7 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Clearly the fraction of adsorbed elements increases more steeply with f when n becomes larger. At the same time the inflection point in the corresponding curves moves downwards, approximately as n-l l 3 which makes it plausible that for n +-00 one ultimately recovers behavior similar to that obtained by Rubin for infinite random chains [2]. No reasonable estimate can be made presently from these data for the corresponding critical value f,, except that f, Q 1.64.…”

Section: Fraction Of Adsorbed Elementsmentioning

confidence: 75%

See 1 more Smart Citation

On the adsorption of a polymer chain at a boundary

Bellemans

1972

J. polym. sci., C Polym. symp.

View full text Add to dashboard Cite

On the basis of a simple lattice model, the adsorption of a polymer chain on a surface is discussed, taking excluded volume effects (intrachain interactions) into account. Configurations of finite chains of n elements (self‐avoiding walks) are enumerated exactly for n ≤ 13 on the simple cubic lattice. Some predictions concerning the asymptotic behavior of long chains are derived from these data by using extrapolation methods previously devised by Domb and Sykes for bulk properties.

show abstract

Section: Fraction Of Adsorbed Elementsmentioning

confidence: 75%

“….). For f < fc the number of adsorbed elements is negligible comF red to n: for f >fc it is of order n, i.e., the chain is in an adsorbed state [2] .…”

Section: -5 a Gn (V) The Number Of Configurations Allowed To The Chmentioning

confidence: 99%

On the adsorption of a polymer chain at a boundary

Bellemans

1972

J. polym. sci., C Polym. symp.

View full text Add to dashboard Cite

show abstract

“…At present it is generally [S-7,lO-121 accepted that the distributions of loop and train sizes are wide. Large loops can then occur as has been shown both experimentally [13,14] and theoretically [5,6,. We first outline the essentials of the theory for one chain.…”

Section: Adsorption Of One Polymer Chainmentioning

confidence: 84%

Theory of polymer adsorption at interfaces

Hoeve

1971

J. polym. sci., C Polym. symp.

View full text Add to dashboard Cite

Previous theories valid for polymer chains with large loops protruding into the solvent are developed. Interaction in various layers parallel to the interface is calculated according to the Flory‐Huggins theory. Excluded volume effects are shown to be so small that they can be neglected. The adsorption isotherm is expressed in two parameters: one for the partition function for adsorbed segments and the other one for the stiffness of the chains. For adsorption from good solvents, the fraction of segments in the surface layer is large and the loops are small. For adsorption from theta‐solvents, the fraction of segments in the surface layer is small and the loops are large. The trends are in agreement with those experimentally observed, but the observed layer thickness is larger than the theoretically deduced upper limit.

show abstract

“…litre- '. Les rdactifs de qualit6 purum ont Ct C utilisds sans purification, ceux de qualitC inf6rieure ont Ct C distillds ou cristallids. Ce sont des produits commerciaux a l'exception de la butyl-2 pyridine et de la di-tertiobutyl-2,6 pyridine qui ont Ct C aimablement mis a notre disposition par le Dr. Halleux. Pour les complexes Ctudits les constantes d'dquilibre de complexation dans le tktrachlorure de carbone ont Ct C mesur6es par spectroscopie infrarouge par Halleux ("), Dierckx et al ('), Rubin et al (6) et Gramstad (').…”

Section: Partie Exp~rimentaleunclassified

“…Le tableau I groupe les diffkrents rksultats; AH est exprim6 en kcal, mole- '. 25" (4) 27" (5) 27" (6) 20" (6) 20" (6) 27" (6) 27" (5) 20" (7) 20" (6) 25" (4) 27" ( 6 ) 25" (4) 25" (4) 25" (4) 20" (6) 25" (4) 25" (4) 25" (4) 20" (7) 25" (4) 20" (') Les amines sont classees par ordre de basicitt croissante, le pKa est renseignk ii la troisibme colonne. Pour le derive di-ortho-tertiobutylk le manque de solubilite dans l'eau n'a pas permis la d&erminationdupKa(8).…”

Section: ~S U L T a T Sunclassified

Chaleurs D'Interaction de Complexes par Liaison Hydrogène. II. — Complexes Phénol — Pyridine Substituée

Neerinck

Lamberts

1966

Bulletin des Soc Chimique

View full text Add to dashboard Cite

Enthalpies of hydrogen bond formation between phenol and substituted pyridines are measured by calorimetry. The obtained energies are compared with the base ionization constants in water and the Q values of the pyridine substituents. The relation formation energy to infrared frequency shift is the same as for alcohols or phenols-pyridine complexes. Distances between 0 and N atoms linked by the hydrogen bond are related to the infrared frequency shift: it is then concluded that a linear relation exists, for the complexes studied, between the heat of formation and the bond distance. Influence of steric hindrance on the bond distance is discussed.La premikre partie de ce travail (I) a trait a I'ttude des chaleurs de complexation de la pyridine avec difftrents donneurs de proton. Les enthalpies de formation sont dttermintes connaissant lachaleur de mtlange de deux solutions dilukes de chacune des deux moltcules. Une mtthode analogue avait t t t appliquke a la complexation d'amines et d'alcools aliphatiques (').Une nouvelle strie de mesures, prtsentte dans cet article, poursuit l'ttude des chaleurs de complexation du phtnol avec des pyridines diversement substitutes. La constante d'tquilibre de complexation a tt6 d6terminte prtctdemment par spectroscopie infrarouge.Cette strie de complexes oh le donneur de proton reste constant montre dans quelle mesure les proprittts des complexes similaires a accepteur constant se trouvent vtrifites. L'effet sttrique des dtrivts ortho (*) Titulaire d'une bourse de spkialisation de 1'1 W O N L .

show abstract

Hydrogen Bonding. II. Phenol Interactions with Substituted Pyridines^1a

Cited by 58 publications

References 5 publications

On the adsorption of a polymer chain at a boundary

On the adsorption of a polymer chain at a boundary

Theory of polymer adsorption at interfaces

Chaleurs D'Interaction de Complexes par Liaison Hydrogène. II. — Complexes Phénol — Pyridine Substituée

Contact Info

Product

Resources

About

Hydrogen Bonding. II. Phenol Interactions with Substituted Pyridines1a

Cited by 58 publications

References 5 publications

On the adsorption of a polymer chain at a boundary

On the adsorption of a polymer chain at a boundary

Theory of polymer adsorption at interfaces

Chaleurs D'Interaction de Complexes par Liaison Hydrogène. II. — Complexes Phénol — Pyridine Substituée

Contact Info

Product

Resources

About

Hydrogen Bonding. II. Phenol Interactions with Substituted Pyridines^1a