Pore size effect on the separation of polymers by interaction chromatography. A Monte Carlo study
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F19%3A10402997" target="_blank" >RIV/00216208:11310/19:10402997 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=1r3.rHyp-z" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=1r3.rHyp-z</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.aca.2019.03.017" target="_blank" >10.1016/j.aca.2019.03.017</a>
Alternative languages
Result language
angličtina
Original language name
Pore size effect on the separation of polymers by interaction chromatography. A Monte Carlo study
Original language description
When the polymers are studied by interaction chromatography (IC) in porous media, the IC separation mechanism competes with the size-exclusion chromatography (SEC) mechanism and under specific conditions close to the critical adsorption point (CAP), the elution times of monodisperse polymer samples nonmonotonically depend on pore sizes. We performed Monte Carlo (MC) simulations to elucidate this intriguing effect. By analyzing the behavior of self-avoiding and intersecting chains in twodimensionally (2D)-confining square pores and in 1D-confining slits in good and Theta-solvents, we confirmed that the dimensionality of the confinement, more specifically, pore geometry, controls the chromatographic behavior. The nonmonotonic dependence of chromatographic characteristics on pore sizes occurs only in separations of self-avoiding chains on stationary phases composed of 2D-confining pores with strongly interacting walls. In agreement with experimental observations, the partition coefficient, K, increases with pore size, D, in narrow pores, peaks and then decreases in wider pores. The combination of thermodynamic and conformational analyses clearly showed that a complex interplay between enthalpy and entropy in 2D-confined media explains the nonmonotonic pore size dependence observed in the IC regime. The study specifies the region of conditions which endanger unambiguous interpretation of elution curves. Because the interplay of steric and adsorption effects takes place not only in chromatography, but also in other separation techniques (e.g., gel electrophoresis, nanofluidic techniques), the conclusions are generally relevant for all separations of large molecules in porous media.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10403 - Physical chemistry
Result continuities
Project
<a href="/en/project/GC17-04258J" target="_blank" >GC17-04258J: Multidimensional distributions in branched and graft copolymers</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Analytica Chimica Acta
ISSN
0003-2670
e-ISSN
—
Volume of the periodical
1064
Issue of the periodical within the volume
August
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
12
Pages from-to
126-137
UT code for WoS article
000464123500013
EID of the result in the Scopus database
2-s2.0-85062946497