Study of the mechanism of sensitization reactions using time-resolved spectroscopic methods


                                          Lucie Ludvíková

  Department of Chemistry and RECETOX, Faculty of Science, Masaryk University, Kamenice 5, 625 00
                                       Brno, Czech Republic
                                        (lucielud@email.cz)


Photosensitization is a photochemically activated reaction initiated via energy or electron
transfer. These processes drew much attention of scientists over the few last decades and have
found many applications in different fields, such as photocatalysis in organic synthesis, material/
surface science and medical treatments, such as photodynamic therapy and photochemical tissue
bonding.

The first part of the talk is focused on a comprehensive investigation of the triplet state
photochemistry of rose bengal dye (RB) and its kinetics using nanosecond transient absorption
spectroscopy.^1 Subsequently, the study of the mechanism of amino acids crosslinking sensitized by
rose bengal, will also be discussed.

In the second part, the mechanism of photoinduced electron transfer in co-crystals of methyl
viologen hexafluorophosphate (MV^2+·2PF[6]^−) and dodecamethylbambus[6]uril (BU6), and the origin
of the long-lived charge-separated state studied by steady-state diffuse reflectance spectroscopy
and femtosecond transient pump–probe spectroscopy, will be review.^2





[1] Ludvíková, L.; Friš, P.; Heger, D.; Šebej, P.; Wirz, J.; Klán, P. PCCP 2016, 18, 16266.

[2] Fiala, T.; Ludvíková, L.; Heger, D.; Švec, J.; Slanina, T.; Vetráková, L. u.; Babiak, M.;
Nečas, M.; Kulhánek, P.; Klán, P.; Sindelar, V. J. Am. Chem. Soc. 2017, 139, 2597.