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Gaining control of the photophysical properties of polycyclic aromatic hydrocarbons


Using Peri-xanthenoxanthene as a model for Polycyclic aromatic hydrocarbons authors showed the possibility to tailor its UV-vis absorption and emission energies through specific substitutional patterns using N-atoms as dopants. 

Cataldo et al., Chemical Science, Vol. 13 - 21, pp. 6335-6347 (2022)

Polycyclic aromatic hydrocarbons (PAHs) are attracting great interest in the recent years for preparing organic semiconductors that, absorbing in the UV-vis spectral range of solar irradiation, generate excited states of interest for light-harvesting applications and photocatalysis.  Herein, we raise the question of whether it is possible to rationally customise optical bandgap properties of a PAH by a specific heteroatom doping pattern and if this can be conceived a priori.  A simple conceptual approach has been developed to allow organic chemists to devise pertinent heteroatom-doping patterns to rationally tune the absorption UV-vis envelope of a given PAH.  Peri-xanthenoxanthene has been used as a PAH model, showing that one can predictably tailor its UV-vis absorption and emission energies through specific substitutional patterns using N-atoms as dopants.


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Customising excitation properties of polycyclic aromatic hydrocarbons by rational positional heteroatom doping: the peri-xanthenoxanthene (PXX) case

Valentini C., Gowland D., Bezzu C. G., Romito D., Demitri N., Bonini N., Bonifazi D.   
Chemical Science, Vol. 13 - 21, pp. 6335-6347 (2022)

DOI: 10.1039/D2SC01038K


Last Updated on Monday, 22 May 2023 15:31