| Summary: | 1 Abstract Faculty of Pharmacy in Hradec Králové, Charles University in Prague Department of Pharmaceutical Chemistry and Drug Control Ljiljana Subara Synthesis of Model Water-Soluble Azaphthalocyanine Fluorescence Quencher Azaphthalocyanine (AzaPc) or tetrapyrazinoporphyrazine as they are often termed in literature, and its substituted derivatives have been investigated extensively for applications as photodynamic therapeutics, dyes, catalysts, liquid crystals, non-linear optical materials and as a red fluorophore. Quenching in general is a process that decreases the fluorescence of another compound. Azaphthalocyanine quenchers are synthetic dyes that decrease fluorescence by absorbing energy over a wide range of wavelengths to dissipate their absorbed energy as non fluorescence. However, in order to do so they must remain in close contact with the fluorescent compound. In this work, we describe the approaches used for the synthesis of azaphthalocyanines (AzaPc) and ways to increasing quenching properties while attaining water solubility. We synthesized a compound which had water solubility as a hydrochloride and no aggregation, however it lacked sufficient quenching properties, and remained difficult to purify on TLC. For improvement of quenching an alternative precursor substituted with a tertiary amine...
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