π-Stacking of rhodamine B onto water-soluble polymers containing aromatic groups

Beyond chemotherapeutics: cisplatin as a temporary buckle to fabricate drug-loaded nanogels

“…1c). This implied that the aggregation of Rb in the NG was possibly due to π–π stacking effects 25, 26 , which was further supported by the fluorescent quenching of Rb (Fig. S3, ESI†).…”

Binding of Methylene Blue to Polyelectrolytes Containing Sulfonate Groups

“…We have already reported the high ability of this polymer to bind aromatic cations or zwitterions, due to a suitable complementation of short-range electrostatic forces, nonspecific hydrophobic interactions, and ar/ar interactions. [28][29][30][31][32][33] UV-Vis analyses show that in the presence of small amounts of PSS, the aggregation of MB is also induced in the environment of the polymer, as can be seen in Figure 7 by the disappearance of the monomer band. But as the concentration of PSS increases from an equimolar ratio (in sulfonate groups), the band corresponding to the higher aggregates shifts continuously to 616 nm, revealing the continuous formation of smaller aggregates.…”

“…Thus, the luminescent, [28][29][30] redox, [31] acid/base, [29,30,32] and binding properties [29][30][31]33] of various substrates are modified by this method. Ar/ar interactions are one of the principal noncovalent forces governing molecular recognition and biomolecular structure.…”

Novel one-pot synthesis and sensitisation of new BiOCl–Bi2S3 nanostructures from DES medium displaying high photocatalytic activity

“…This may occur by both electrostatic interactions and -stacking between aromatic rings. 47 The hypothesis of insertion of RhB molecules (thickness 4.75 Å, ACD/ChemSketch) in the interlayer spacing of the BiOCl structure (d = 7.38 Å), in a similar way to that previously reported for Rh6G intercalation in titanate nanotubes 48 has been discarded due to the zwitterionic nature of the molecules and since it was not observed any shift in the XRD peak corresponding to the interlayer spacing 2θ = 12 o (data not shown). The results presented above indicate that the removal ability of such materials can be manipulated by changing the pH of the dye solution (to an extent limited by the dye properties) and the remarkable ability to remove RhB from solution by adsorption may also be expected to be extended to other cationic and anionic dyes by tuning the p.z.c.…”