Design and spectral-luminescent properties of a triad consisting of two BODIPY chromophores axially bound to a Sn(IV)-porphyrin in aqueous and aqueous micellar media

Abstract

In this work, we designed and studied the emissive properties of a triad consisting of two BODIPY chromophores axially bound to a Sn(IV)-porphyrin via a methylphenolate bridge in aqueous and aqueous micellar media. It has been shown that the fluorescent properties of the porphyrin fragment of the triad, due to photoinduced energy transfer from the axial fragments to the macrocycle, are most sensitive to small changes in viscosity in the range from 3 to 6 cP, which corresponds to the viscosity of the blood of a healthy person (4–6 cP). The localization of the triad in the spherical CTAB micelles increases its emission in aqueous media. The structure–property dependencies established in the study can be applied to design molecular devices for sensing local viscosity of aqueous and aqueous micellar media, which could be of great interest for non-contact detection of physical properties of intracellular or lymphatic fluids.