Closed polymer containers based on phenylboronic esters of resorcinarenes

Area of Science:

• Polymer Chemistry
• Materials Science
• Nanotechnology

Background:

• Sulfonated resorcinarene (SRA) derivatives are explored for advanced material applications.
• Developing stable nanocontainers for controlled release is a key challenge in drug delivery and sensing.
• Boronic acid cross-linking offers a versatile method for creating functional polymer nanostructures.

Purpose of the Study:

• To synthesize and characterize novel polymer nanospheres (p(SRA-B)) using sulfonated resorcinarene and phenylboronic acid.
• To evaluate the stability and nanocontainer properties of the synthesized p(SRA-B).
• To demonstrate the pH- and glucose-triggered release capabilities of p(SRA-B) using fluorescent dyes.

Main Methods:

• Synthesis of polymer nanospheres (p(SRA-B)) via cross-linking of sulfonated resorcinarene (SRA) with phenylboronic acid.
• Loading of various fluorescent dyes (fluorescein, pyrene, pyrenetetrasulfonic acid) into the nanospheres.
• Assessment of dye release kinetics under varying pH conditions (pH 3) and glucose concentrations.

Main Results:

• Successfully prepared stable polymer nanospheres (p(SRA-B)) with good water stability.
• Demonstrated efficient loading of multiple fluorescent dyes within the p(SRA-B) nanocontainers.
• Confirmed pH-dependent (at pH 3) and glucose-induced release of the encapsulated dyes.

Conclusions:

• p(SRA-B) nanospheres are effective and stable nanocontainers.
• The release mechanism is controllable by environmental stimuli like pH and glucose.
• These nanospheres show potential for applications in sensing and controlled release systems.