Nuclear magnetic relaxation and phase transitions of diethylene glycol in Vycor porous glasses

Gizatullin, Bulat; Pimenov, G. G.

doi:10.1134/s1061933x10050066

Cited by 2 publications

(1 citation statement)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The nanopore volume comparable with molecular size of dimethylsulfoxide is 2.4 % of the total pore volume. The volume of nanopores was determined in a similar way in our previous work on the study of the diethyleneglycol adsorption [18]. The nanopore volume is comparable with size of the molecules of diethyleneglycol equals 3.5 % of the total pore volume.…”

Section: Instrument and Techniquesmentioning

confidence: 99%

Study of the Distribution of Organic Molecules in the Porous Space of Vycor Glasses

Gizatullin

Pimenov

2014

Appl Magn Reson

View full text Add to dashboard Cite

The melting crystallization processes of cyclohexane and dimethylsulfoxide adsorbed in porous glasses Vycor have been investigated by nuclear magnetic resonance method in a wide temperature range. It has been established that the adsorbed molecules form aggregates or clusters of different sizes depending on the polarity of the adsorbed fluid. In addition, this effect leads to an inhomogeneous distribution of the adsorbed non-polar molecules in the porous volume of porous glasses Vycor. It has been shown based on the analysis of the temperature dependence of the relative proportion of the amorphous component that the molecules of the adsorbed fluid can be part of different ''phases'' below the melting temperature at concentration corresponding to the monolayer filling: (1) the molecules in the crystalline state, (2) the molecules in amorphous ''non-frozen'' layer, (3) molecules in the amorphous state on the surface which are not included in the ''non-frozen'' layer, and (4) the molecules in the nanopores.

show abstract

Section: Instrument and Techniquesmentioning

confidence: 99%