Dresden 2026 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
FM: Fachverband Funktionsmaterialien
FM 4: Focus Session: (Anti)ferroic states – Non-conventional states I
FM 4.9: Talk
Monday, March 9, 2026, 17:30–17:45, BEY/0138
Tuning the Properties of the Organic Supramolecular Ferroelectric BTA by Dipole Engineering — •Sophia Klubertz1, Florian Behrendt2, Johannes Brendel2, and Martijn Kemerink1 — 1IMSEAM, Heidelberg University, Germany — 2Bayreuth University, Germany
Benzene-1,3,5-tricarboxamide (BTA) has become the paramount example of an organic supramolecular ferroelectric. To widen the property space of these compounds, and to gain insight into the underlying structure-property relations, this work examines the impact of a stepwise replacement of BTA's three amide groups by urea groups, as well as of the anchoring point of the dipolar group. We investigate BTA-C6/2 analogues, where one (BUDA), two (BDUA), or three (BTU) amide groups are substituted by urea groups. The compounds were newly synthesized in their C-centered and N-centered versions, regarding the amide connectivity. True ferroelectric behavior was experimentally demonstrated for C- and N-centered BUDA and BDUA through temperature- and time-dependent electrical switching measurements. By investigating remnant polarization values and double structures in the switching currents, we can draw conclusions about the switching behavior of urea groups in comparison to amide groups of either connectivity. Moreover, we find orders-of-magnitude differences in key properties like retention time, which we rationalize through molecular dynamics simulations. Overall, the results show how chemical structure translates into (ferroelectric) properties.
Keywords: Organics; Ferroelectricity; BTA; Supramolecular; Dipole Engineering