SKM 2023 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 54: 2D Materials VIII
CPP 54.4: Vortrag
Donnerstag, 30. März 2023, 17:15–17:30, MER 02
Tunable gas permeation properties through sub-nanometer porous molecular thin carbon nanomembranes — •Vladislav Stroganov1, Daniel Hüger1, Tabata Noethel1, Christof Neumann1, Monika Kruk2, Piotr Cyganik2, and Andrey Turchanin1 — 1Friedrich Schiller University Jena, Jena, Germany — 2Jagiellonian University, Kraków, Poland
Molecular thin carbon nanomembranes (CNMs) are 1 nm thick nanosheets with sub-nanometer porosity combined with high mechanical and chemical stability. These properties make them promising for the next generation of filtration and gas separation technologies. Here we investigated influence of the structure of molecular precursors on the gas permeation properties of a series of CNMs. The CNMs were synthesized from self-assembled monolayers of biphenyl substituted carboxylic acids on silver substrate C6 H5−C6 H4−(CH2)n−COO|Ag (n = 2 - 6) via the electron-irradiation induced cross-linking. We study for this homologous sequence of CNMs the permeation of He, D2 and D2O vapors as a function of temperature. We demonstrate that even a smallest variation of the number of −CH2− units leads to a significant change in the permeation which enables the molecular design of these nanomembranes for nanofiltration.