Positively Charged Hyperbranched Polymers with Tunable Fluorescence and Cell Imaging Application.

Area of Science:

• Materials Science
• Polymer Chemistry
• Biomedical Engineering

Background:

• Fluorescence-tunable materials are crucial for optics, electronics, and biomedical applications.
• Developing materials with controllable emission properties is an ongoing challenge.

Purpose of the Study:

• To create a multicolor molecular pixel system using a straightforward copolymerization method.
• To investigate the tunable fluorescence and cellular behavior of novel polymers.

Main Methods:

• Utilized a simple copolymerization technique to synthesize multicolor fluorescent polymers.
• Investigated fluorescence properties in solid, solution, and hydrogel states.
• Performed in vitro and in vivo experiments to assess cell permeability and DNA/RNA selectivity.

Main Results:

• Successfully reproduced multicolor fluorescence by combining blue and yellow emitting segments.
• Demonstrated fine-tuning of emission colors across different physical states.
• Observed cell-membrane permeability and selective accumulation of polymers in the cell nucleus.
• Verified prominent selectivity of the [tris(4-(pyridin-4-yl)phenyl)amine]-[1,8-dibromooctane] polymer for DNA over RNA within cells.

Conclusions:

• The developed copolymerization method yields versatile multicolor fluorescent materials.
• These polymers exhibit tunable emission and selective DNA binding capabilities.
• The findings suggest potential applications in advanced imaging and diagnostics.