Higher Secondary Education

• V1 stimulated fluorescence of merocyanine (generated in situ from spiropyrane using light) by immobilisation in polystyrene (merocyanine in solution doesn't fluoresce)
• V2 Fluorescence quenching of chlorophyll with β-carotene
• V3 Protection of chlorophyll against photooxidative degradation under intensitve light in air with β-carotene
  • Educational movie "Photosynthesis – a case for two, Part 2"
  • Workshop "Light Laboratory: Leaf"
• V4 Increased light yield from chemoluminescence with the help of fluorophors (rubrene, nile red, violanthron and others)
• V5 Upconversion of lower-energy photons to higher-energy photons by triplet-triplet annihilation
  • Educational movie „Underground-Mingolf, Colour by light emission“
  • Animation on triplet-triplet annihilation
  • Excerpt from EPA (European Photochemistry Association) - Newsletter 2020, "Two Versatile Experiments for Teaching Photochemistry: Photon Upconversion by TTA and All Optical INHIBIT Logical Gate"

Technical Contents

Quenching of excited states through intermolecular energy transfer (Förster- and Dexter mechanisms in part, if applicable); halflife of singlet and triplet states; quantum yield from luminescence and their manipulation by the immediate vicinity of the luminophor: Influence of the halflife of the primary excited particle on the intermolecular energy transfer; follow-up processes after the energy transfer: luminescence (fluorescence, phosphorescence, chemoluminescence, elektrochemoluminescence), different types of chemical reactions

Scope

energetics (importance of the intermolecular energy transfer for the accessory pigments in the photosynthetic center, the photosensibilisation of materials within the photovoltaik and the akctive compounds in the photodynamic therapy within the medicine) (higher secondary education)