TERC3 - Tremplin-ERC

Molecular Approaches to Multifunctional Ferroelectric Materials – MolFerro

Submission summary

Ferroelectric materials built up with molecular entities are at the forefront of condensed matter chemistry and physics. Key challenge facing these materials is engendering outstanding polarization coupled with multifunctionalities. Tackling this challenge requires synthetic chemistry focused on new paradigms to fine-tune electronic, atomic, and molecular motions, for [a] large polarization, [b] simultaneous emergence with magnetism, and [c] photo-switchable polarization. MolFerro aims to develop such materials using original and uncharted approaches. For [a], I propose to harness halogen bond as a new source of ferroelectricity. The distinctive large dipole will be embedded in judiciously designed supramolecular networks to create a privileged direction of halogen motion and charge transfer. This controlled emergence of the dipole will induce strong polarization. For [b], I will design metal-organic frameworks bearing directionally controlled charge transfer interactions. The uniaxial charge transfer interaction will induce ferroelectricity, and the carefully designed network will engender a magnet phase. Particularly, the rational organization of the implemented building blocks will induce a simultaneous emergence of these two physical properties. For [c], I will explore photo-induced phase transitions of the charge transfer materials by elaborate optical spectroscopies to engender electronic and molecular motions by light. This will target a reversible photo-switching of ferroelectricity and emergent magnetic properties for the first time. Taken together, MolFerro will develop an original family of materials, featuring various characteristics lacking so far in any molecule-based ferroelectric systems. Ultimately, this platform will contribute towards ultrafast and multi-stimuli controllable devices in numerous areas such as sensing, information storage, mechanical actuation, and energy harvesting.

The success of MolFerro will pave a way of new design approaches towards developing a next generation of ferroelectric materials. The expertise of the candidate, Dr. Ie-Rang Jeon, in elaborate syntheses and extensive physical studies of molecule-based materials places her in a unique position to pursue this interdisciplinary research. The support through ANR tremplin-ERC will be of vital importance in order to obtain preliminary results and to improve her application to next calls of ERC starting grant.

Project coordination

Ie-Rang JEON (Institut des Sciences Chimiques de Rennes)

The author of this summary is the project coordinator, who is responsible for the content of this summary. The ANR declines any responsibility as for its contents.

Partner

ISCR Institut des Sciences Chimiques de Rennes

Help of the ANR 147,613 euros
Beginning and duration of the scientific project: December 2017 - 18 Months

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