Chiral materials formed by aggregated organic compounds play a fundamental role in chiral optoelectronics, photonics and spintronics. Nonetheless, a precise understanding of the molecular interactions involved remains an open problem. Here we introduce magnetic circular dichroism (MCD) as a new tool to elucidate molecular interactions and structural parameters of a supramolecular system. A detailed analysis of MCD together with electronic circular dichroism spectra combined to ab initio calculations unveils essential information on the geometry and energy levels of a self-assembled thin film made of a carbazole di-bithiophene chiral molecule. This approach can be extended to a generality of chiral organic materials and can help rationalizing the fundamental interactions leading to supramolecular order. This in turn could enable a better understanding of structure-property relationships, resulting in a more efficient material design.Magnetic circular dichroism gives access to the geometry and interactions leading to the supramolecular structure of a thin film of an organic chiral molecule. The technique presented here may be applied to elucidate the structures of aggregates of organic compounds.+image

Magnetic Circular Dichroism Elucidates Molecular Interactions in Aggregated Chiral Organic Materials

Gabbani, Alessio
Co-primo
;
Taddeucci, Andrea
Co-primo
;
Pineider, Francesco;Aronica, Laura Antonella;Di Bari, Lorenzo;Pescitelli, Gennaro;Zinna, Francesco
Ultimo
2024-01-01

Abstract

Chiral materials formed by aggregated organic compounds play a fundamental role in chiral optoelectronics, photonics and spintronics. Nonetheless, a precise understanding of the molecular interactions involved remains an open problem. Here we introduce magnetic circular dichroism (MCD) as a new tool to elucidate molecular interactions and structural parameters of a supramolecular system. A detailed analysis of MCD together with electronic circular dichroism spectra combined to ab initio calculations unveils essential information on the geometry and energy levels of a self-assembled thin film made of a carbazole di-bithiophene chiral molecule. This approach can be extended to a generality of chiral organic materials and can help rationalizing the fundamental interactions leading to supramolecular order. This in turn could enable a better understanding of structure-property relationships, resulting in a more efficient material design.Magnetic circular dichroism gives access to the geometry and interactions leading to the supramolecular structure of a thin film of an organic chiral molecule. The technique presented here may be applied to elucidate the structures of aggregates of organic compounds.+image
2024
Gabbani, Alessio; Taddeucci, Andrea; Bertuolo, Marco; Pineider, Francesco; Aronica, Laura Antonella; Di Bari, Lorenzo; Pescitelli, Gennaro; Zinna, Francesco
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/1218229
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