dressing the influence of non-hexagonal rings on the optoelectronic properties of nanographenes, this work shows that the presence of curved edges created by the inclusion of a heptagonal carbocycle enhances the two-photon absorption on graphene nanoribbons. We show that structural defects can be harnessed for tuning the optical response of nanographenes.
The work has been highlighted in ChemViews Magazine and in a hot topic of Advanced Materials dedicated to Carbon, Graphite and Graphene.
Novel hybrid based on GQDs covalently linked to corrole units bearing a glycol branch ave been prepared. Te internalization and distribution of the hybrids in live animal cells was evaluated in human breast adenbocarcinoma cell line (MCF-7 cells) using confocal and multiphoton microscopy. Notably, multiphoton microscopy allowed for image collection using nonlinear excitation in the near-infrared and emission in the red part of the visible spectra.
These results show that the resulting hybrids can be particularly useful as fluorescent labels for thick biological samples due to the reduced scattering and the longer penetration depth of NIR light
A systematic study of the two-photon absorption properties of bay substituted PDIs disentangles the different structural factors affecting the PDIs nonlinear response . The best performance in terms of nonlinear absorption was found in tetra-phenoxy bay-substituted PDIs with an A-PDI-A architecture that shows a TPA cross-section one order of magnitude higher than that of planar unsubstituted PDI, despite its distortion from planarity. This study constitutes a paradigmatic example of twisted core PDIs with enhanced optical properties that adds to the previously observed enhanced of photoconductivity in crystalline heterojunctions with twisted PDIs as electron acceptors
Site was designed with Mobirise web themes