The honorary member of our HYDIS team Dr. Jovan Nedeljković held an exceptional lecture entitled “TiO2 based interfacial charge transfer complex with dihydroquercetin: Optical properties and reactivity of photogenerated species” at The 7th International Conference on the Physics of Optical Materials and Devices (ICOM) and The 4th International Conference on Phosphor Thermometry (ICPT)” in Bečići, Montenegro. He presented the results of our HYDIS project related to DFT calculations on a cluster model that mimics the ICT complex. Moreover, EPR spectroscopy showed the difference between the behavior of the unmodified and surface-modified TiO2 powders with taxifolin before and upon excitation.