An Amino Acid‐Appended Naphthalene Bisimide‐Based Bolaamphiphile‐ Selective Sensing of Chaotropic Anions by Thixotropic Hydrogelations
Year: 2025
Type: article
Abstract: An amino acid‐based fluorophore probe, L‐tryptophan appended naphthalene di‐imide ( NDI‐W ) forms stable hydrogels selectively in the presence of chaotropic anions (SCN − , ClO 4 − , I − , and NO 3 − ), borderline anion (Br − ) and F − in 50 mM phosphate buffer of pH 8. NDI‐W did not form stable hydrogels in 50 mM phosphate buffer of pH 8 in the presence of kosmotropic anions (S 2 O 3 2− , SO 4 2− , CH 3 COO − , and citrate) at the same conditions. However, gel‐like assemblies for NDI‐W in presence of S 2 O 3 2− , SO 4 2− , CH 3 COO − , IO 3 − , HSO 3 − , HCO 3 − , and NO 2 − anions and precipitate formation in the presence of H 2 PO 4 − , HSO 4 − , and citric acid in 50 mM phosphate buffer of pH 8 have been observed. Interestingly, NDI‐W did not form hydrogel in 50 mM phosphate buffer of pH 8 at 4 times higher concentration of NDI‐W also compared to the concentration used for the anions induced hydrogelations however, forms hydrogel when higher ionic concentration of HPO 4 2− is added into it. All these hydrogels are thixotropic in nature. Thus, NDI‐W is selectively forming hydrogels with chaotropic and borderline anions which could be used to detect higher concentrations of salts in water and can be useful for corelating supramolecular complex viscoelastic properties at higher salt concentrations of biologically relevant systems.
Source: Chemistry - An Asian Journal
Authors: Abhinandan Bera, Sunil Kumar Meena, Biplab Mondal, Subhasish Roy
Language: English
Subfield: Biomaterials
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
Award: G8878246669
OpenAlex ID: W4409962550