Post-modifiable trapezoidal cage and selective recognition of SO from HPO-containing environments.

Selective recognition of SO from HPO-containing environments is highly challenging, as SO and HPO not only share similar structures and sizes, but also exhibit similarities in many characteristics such as charge density, acidity, and hydration energy. In this contribution, a post-modifiable trapezoidal cage (1a) was developed to address the selective recognition of SO from HPO, as well as to cope with the difficulties of trapezoidal cages in post-modification and property variation. Coupled with the newly explored [4 + 4] cyclization strategy, the synthesis efficiency of producing trapezoidal cages has also been greatly improved.

Carboxymethyl cellulose and sodium alginate-enhanced hydrogel for carbon dots loading: A novel platform for pH sensing and sensitive detection of Al and Ag.

To address the challenges associated with the storage and application of traditional carbon dot (CDs) solutions, this study introduces a cyan fluorescent carbon dot-based hydrogel (CDs-SCH). The hydrogel was synthesized by integrating cyan fluorescent CDs, derived from penicillamine and m-phenylenediamine, with carboxymethylcellulose (CMC) and sodium alginate (SA), which was then mixed with acrylamide (AM). The resulting CDs-SCH hydrogel was extensively characterized, focusing on its morphology, chemical structure, and fluorescence behavior.

Construction of carbon dot-embedded fluorescent hydrogels based on oxidized gum arabic-gelatin Schiff base for Cr(VI) detection applications.

In this study, a novel nitrogen-doped carbon quantum dot/oxidized gum arabic-gelatin-based fluorescent probe (NAH) was prepared using gelatin (GL) and gum arabic (AG) biomolecules. The primary network structure of this hydrogel consisted of polyacrylamide (PAM), while a secondary network structure was constructed between oxidized gum arabic and gelatin through the reaction of the Schiff base, which significantly enhanced the mechanical properties, the stress and strain of NAH reached 266.47 KPa and 2175.