11-13 December 2019
ILL4
Europe/Paris timezone

Calixarene "flowers" blossoming captured with cryoTEM imaging

11 Dec 2019, 18:00
3h

Speaker

Nadia Lengweiler (Opara) (C-CINA, Biozentrum, University of Basel)

Description

We are presenting transmission electron microscopy (TEM) imaging as an advanced tool for characterization freestanding crystalline metalorganic networks (MONs) [1]. As an example of creation of ultrathin material, the two-dimensional (2D) layer of the monomolecular thickness amphiphilic derivatives of calix[4]arenes are selected [1, 2]. The methyl-carboxy-functionalized calix[4]arenes can undergo mono to bilayer transition from nucleated and gradually grown second layer islands. The TEM imaging performed in the low dose mode and at cryo-conditions allows for obtaining micrographs capturing observation of this process on freestanding membranes suspended over lacey-carbon-covered copper grids.

The financial support of the Swiss Nanoscience Institute through the ORACLE grant P1308 and project P1305 is gratefully acknowledged.

References:
1. M. Moradi, N.L.Opara et al., Sci. Adv. 5 (2019), eaav4489, "Supramolecular architectures of molecularly thin yet robust free-standing layers”,
2. M. Moradi, N.L. Opara et al., submitted to Angew. Chem. (2019), "Kinetically controlled mono- to bi-layer transition in 2D metal-organic networks”.

Primary author

Nadia Lengweiler (Opara) (C-CINA, Biozentrum, University of Basel)

Co-authors

Mina Moradi (School of Life Sciences, University of Applied Sciences and Arts Northwestern Switzerland) Patrick Shahgaldian (School of Life Sciences, University of Applied Sciences and Arts Northwestern Switzerland) Henning Stahlberg (C-CINA, Biozentrum, University of Basel )

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