Langmuir monolayers based on rigid wedge-shaped dendrons of benzenesulfonic acid
Autor(en): | Malakhova, Yu. N. Stupnikov, A. A. Bakirov, A. V. Shcherbina, M. A. Beginn, U. Chvalun, S. N. |
Stichwörter: | AIR-WATER-INTERFACE; ALKYL CHAIN-LENGTH; AMPHIPHILIC MONODENDRONS; BEHAVIOR; Chemistry; Chemistry, Multidisciplinary; CRYSTALLINE; Langmuir monolayer; ORGANIZATION; PHASE; SELF-ASSEMBLED MONOLAYERS; self-organization; SUPRAMOLECULAR DENDRIMERS; UNIVERSAL FORCE-FIELD; wedge-shaped monodendrons | Erscheinungsdatum: | 2018 | Herausgeber: | SPRINGER | Journal: | RUSSIAN CHEMICAL BULLETIN | Volumen: | 67 | Ausgabe: | 9 | Startseite: | 1589 | Seitenende: | 1594 | Zusammenfassung: | The structure formation of wedge-shaped monodendrons based on symmetric benzenesulfonic acid with different lengths of peripheral alkyl chains was studied in Langmuir monolayers and Langmuir-Blodgett (LB) films. A phase transition from the liquid-expanded state to the liquid-condensed state was observed on compression of the Langmuir monolayers of the dendrons containing dodecyl lateral chains. The transition is accompanied by the formation of star-shaped aggregates visualized by Brewster angle microscopy. The three-layer LB transfer results in the reorganization of the monolayer into regions of bi-, tetra-, and hexalayers on a solid substrate with a low coverage of the surface. Homogeneous liquid-condensed mono layers are formed for the dendrons with hexa- and octadecyl chains, and the film thickness achieved by the LB transfer corresponds to the monolayer alignment of the molecules with the surface coverage up to 90%. It was determined that varying the alkyl length of wedge-shaped dendrones based on symmetric benzenesulfonic acid leads to a change in phase behavior of Langmuir monolayers as well as Langmuir-Blodgett films formed by them. |
ISSN: | 10665285 | DOI: | 10.1007/s11172-018-2262-9 |
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