Hydrophilic gel compo sition eff ect on the molecula r association and spectros copic beh avior of M ethylen blue

Ionic dy es such as M B can easily form aggregates in solution that this aggregation leads to a strong c oupling of the molecula r transition dipoles. Exist electros tatic intera ction betwee n molecula r transition dipoles of the chromop hores split energy levels of the ex cited states of the dye molecules [۱-۲]. This st udy is intend ed to provide the infor mation about the effect of the PAAM structural compositi on on the g uest–host interactions and aggregative properties of MB in binary hydrogel solvent systems b y means of the exciton t heory.Materials and methods:Acrylamide(۹۷%),N,N-methylenebisacrylam ide( ۹۸%), N,N,N,N-etramethylethylenediami ne ( ۹۹%) (TEMED) and ammon ium persul fate ( ۹۸% ) (APS) were used for synthesizin g polyacrylamide gels with compositional ۲۰% (Polyacrylamide/Water (w/w)). The MB d ye was proc ured from Exciton and used without further purification. The dye-loa ded hydrogel was prep ared by soaking the hydrogel host in aqueous solutions of MB dye with know n concentration for various durations of time (۱ min to ۱۰ hours) at ۲۲ °C.

کلیدواژه ها:

Methyle n blue ، Poly acrylamide hydrogel ، D ye aggregation ، Exciton theory