Latest Publications

DOI: 10.1016/j.bmc.2019.05.011

Bioorganic & Medicinal Chemistry

The use of Photodynamic Therapy (PDT) for the treatment of several kinds of cancer as well as bacterial, fungal or viral infections has received increasing attention during the last decade. However, the currently clinically approved photosensitizers (PSs) have several drawbacks, including photobleaching, slow clearance from the organism and poor water solubility. To overcome these shortcomings, much effort has been made in the development of new types of PSs, such as Ru(II) polypyridyl complexes. Nevertheless, most studied Ru(II) polypyridyl complexes have a low absorbance in the spectral therapeutic window. In this work, we show that, by carefully selecting substituents on the polypyridyl complex, it is possible to prepare a complex absorbing at much higher wavelength. Specifically, we report on the synthesis and in-depth experimental and theoretical characterisation of a Ru(II) polypyridyl complex (complex 3) combining a s...

DOI: 10.1002/cptc.201900117

ChemPhotoChem

A tolane‐based molecule, the 4‐fluorophenyl 4‐((4‐(octyloxy)phenyl)ethynyl)‐benzoate (FOEB), was recently reported to show Crystallisation‐Induced Emission (CIE) and Aggregation‐Caused Quenching (ACQ) [Tong et al., J. Phys. Chem. C, 2015, 119, 21875]. In this work, we rely on a combination of tailored computational methods based on molecular dynamics, (TD‐)DFT and QM/QM’ calculations, to investigate the structural and optical properties of FOEB in solution, crystal and aggregate. First, the computation of the Huang‐Rhys factors and the reorganization energies can rationalize the modulation of the emission efficiency observed when changing the solvent polarity. The moderate fluorescence quenching observed in solution is due to the photophysical energy dissipation caused by low‐frequency vibrational modes involving the lateral groups along with motions out of the plane of the molecule. In crystalline environment, due to the packing arrangment, ther...

DOI: 10.1021/acs.jpcc.9b01047 

The Journal of Physical Chemistry

Oxide-carbonate composite electrolytes are complex materials whose peculiar conductivity performances are yet to be fully understood. Stability issues however arise when the carbonate is combined to an oxide such as TiO2, preventing practical fuel cell application of TiO2-based composites. To investigate the origin of such instability, a combined experimental and Density Functional Theory based approach is here presented and applied to the LiKCO3-TiO2 composite, focusing on energetic, electronic and vibrational properties. The origin of the instability of this composite could be traced back to the intrinsic reducible nature of TiO2, with inserted Li being almost fully oxidized and stabilized by reduced Ti atoms at the oxide surface, thus facilitating LixTiO2 phases formation and accumulation close to the interface between the oxide and the carbonate. This demonstrates that although the interface formation is critical for en...

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