Magnetic Circular Dichroism Elucidates Molecular Interactions in Aggregated Chiral Organic Materials

Author:

Gabbani Alessio12ORCID,Taddeucci Andrea13,Bertuolo Marco1,Pineider Francesco12ORCID,Aronica Laura Antonella1ORCID,Di Bari Lorenzo1ORCID,Pescitelli Gennaro1ORCID,Zinna Francesco1ORCID

Affiliation:

1. Dipartimento di Chimica e Chimica Industriale Università di Pisa Via Moruzzi 13 56124 Pisa Italy

2. Department of Physics and Astronomy University of Florence via Sansone 1 50019 Sesto Fiorentino, FI Italy

3. Current affiliation: Diamond Light Source Ltd. Fermi Avenue Chilton Didcot OX11 0DE UK

Abstract

AbstractChiral 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.

Publisher

Wiley

Subject

General Medicine

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