Seminář ÚFKL: Roland Resel

Ústav fyziky kondenzovaných látek vás zve na přednášku

Roland Resel (Institut of Solid State Physics, Graz University of Technology, Austria):
Conglomerate screening of axial chiral molecules by thin film crystallisation

Chirality of molecules is a specific feature in nature with huge impact on biological systems. The talk will introduce the chirality of molecular systems, axial chiral molecules will be introduced which have the possibility to change the chirality from R- to S- conformation. We report on the thin film formation by solution processing starting from a racemic solution. Specific processing parameters are found which favours the formation of chiral phases. Since classical X-ray diffraction cannot distinguish between crystals of different chiralities, two different methodologies will be introduced for chirality determination: Resonant X-ray diffraction and circular dichroism using Müller matrix approach. The results reveal that that the presence of a surface during the crystallisation process is responsible for the formation of enantiopure systems and also for conglomerate thin films.

This lecture was supported by the project QM4ST (Quantum materials for applications in sustainable technology), reg. no. CZ.02.01.01/00/22_008/0004572, cofunded by the ERDF from the Programme Johannes Amos Commenius, call Excellent Research.