  Water-soluble nanocomposites based on CdSe/ZnS quantum dots (QDs) and
hydrophobic tetraphenylporphyrin (TPP) molecules passivated by chitosan (CS)
have been formed. Magnetic circular dichroism (MCD) spectra evidence TPP
presence in both monomeric and agglomerated forms in the nanocomposites. The
nanocomposites demonstrate more pronounced singlet oxygen generation in
comparison with free TPP in CS at the same concentration due to intracomplex
Forster resonance energy transfer (FRET) with 45 % average efficiency.
