Contacts:
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Supervisor(s):
Prof. Giuliano Siligardi (DLS, Didcot, UK), Prof. Lorenzo DI Bari (Università di Pisa, IT)
Title of the PhD project:
CD Imaging o chiral semi-conducting π-conjugated polymers
Abstract of the PhD project:
The project consists in surface scanning and complete ECD spectra recording on each pixel of thin films of π-conjugated chiral materials with the use of an apparatus built-up at B23 line of Diamond Light Source (CD imaging or CDi). I will contribute to the further development of this instrumentation and I will extend the analysis integrating a full B23 Mueller Matrix Polarimeter (MMP). I will also work on the synthesis and preparation of thin films of chiral organic semiconductors. I will design and synthetize chiral aromatic monomers, which will be used for building oligo- or polymeric organic semiconductors. I shall study their supramolecular structure and their organization into the thin films by means of the CDi and localized MMP analysis. I shall pursue the synthesis of luminescent systems, which do not give rise to aggregation-caused quenching (ACQ) that is a common effect with organic chromophores. Preserving emission in the solid state will be of prime importance, as well as preparing homogeneous and well-organised chiral supramolecular structure generating spectra of the highest CD intensity magnitude. Successful materials will be evaluated for the fabrication of CP-OLED in collaboration with the other units of the HEL4CHIROLED consortium. The emission spectrum can be modulated to some extent by choosing co-monomers and appropriate substituents. I shall study in-depth all these aspects, with the aid of computational methods, and of a combination of optical techniques (fluorescence, ECD, CPL), microscopy (POM, EM, AFM) and of scattering and diffractometric methods in collaboration with the Technical University of Eindhoven (NL).
Publications:
• F. Zinna, G. Albano, A. Taddeucci, T. Colli, L. A. Aronica, G. Pescitelli, L. Di Bari. “Emergent non-reciprocal circularly polarized emission from an organic thin film”, Adv. Mat. 2020, 32, 2002575.
Oral communications at conferences:
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Poster communications at conferences:
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Other achievements:
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