Abstract
The photophysical properties of an original covalently-bonded dyad based on a perylene derivative and IR-780 cyanine dye were studied. The dyad has pronounced absorption in the NIR region of the spectrum and a strong fluorescence signal, which is weakly quenched by the influence of the perylene derivative. Upon excitation of the dyad in the absorption region of perylene, a fluorescence signal from IR-780 is detected due to the Förster energy transfer mechanism. It is shown that the dyad does not generate singlet oxygen upon photoexcitation in the NIR region of the spectrum. However, it can generate superoxide anion radicals, indicating the presence of the photoinduced electrons transfer from the dye to the perylene.
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