FIELD: organic chemistry. SUBSTANCE: claimed pigments comprise hither to unknown combination of styryl pigment fragments and thiacrown-ester fragments. Owing to their structure, said compounds are capable of binding selectively cations of heavy and transition metals, complexing process inducing changes in electronic spectra thereof. These properties make it possible to use them in optical sensors for mercury with view of applying them in industry or in monitoring of environment. Preparation method is simple and makes it possible to prepare compounds of new type of wide range and with good yields. EFFECT: improved properties of the thiacrown containing styryl pigments. 3 cl, 15 ex
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