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Caption : Fig. S1 (A) Representative absorbance spectra of free (1) and completely bound (2) B1. (B) Scatchard plot for B1-poly(A) complexation from absorbance. (C) Representative steady state fluorescence spectra of free (1) and completely bound (8) B1. (D) Scatchard plot for B1-poly(A) complexation from fluorescence.


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Caption : Fig. S2.  Job’s plot for the binding of (A) BER (B) B1 (C) B2 and (D) B3 with poly(A).

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Caption : Fig. S3. Stern−Volmer plots for quenching of fluorescence intensity by increasing concentration of [Fe(CN)6]4− of (A) BC, (B) B1, (C) B2, and (D) B3 in the absence (■) and in the presence (●) of poly(A) in 10 mM CP buffer, pH 7.0, at 20 °C.

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Caption : Fig. S4. The slope of the plot of log Ka versus log [Na+] on the binding of B1 (●), B2 (■) and B3 (▲) to poly(A).

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Caption : Fig. S 5. Plot of variation of enthalpy of binding (ΔHo) with temperature for binding of B1 (●), B2 (■) and B3 (▲) to poly(A).