Spectroscopic study of interaction of styrylcyanine dye Sbt and its derivatives with bovine serum albumin

► Spectral-luminescent characteristics of dye Sbt and its homodimers upon binding to BSA were studied. ► Determined the binding constant (K) and number of binding sites (N) studied dyes with BSA. ► The dependence of the binding constant of the dipole moment of dye molecules was determined.