Fluorescence to multi-colored phosphorescence interconversion of a novel, asterisk-shaped luminogen via multiple...

Area of Science:

• Materials Science
• Organic Chemistry
• Photophysics

Background:

• Luminogenic materials are crucial for sensing and imaging applications.
• Developing stimuli-responsive luminescent compounds is an active area of research.
• Controlling luminescence properties through external stimuli offers new avenues for material design.

Purpose of the Study:

• To design and characterize a novel asterisk-shaped luminogen, hexakis(pyridin-4-ylthio)benzene (HPTB).
• To investigate the stimuli-responsive luminescence behavior of HPTB.
• To explore the reversibility and reproducibility of the observed luminescence changes.

Main Methods:

• Synthesis and characterization of hexakis(pyridin-4-ylthio)benzene (HPTB).
• Exposure of HPTB to external stimuli including methanol (CH3OH), protons (H+), and silver ions (Ag+).
• Spectroscopic analysis to monitor changes in fluorescence and phosphorescence emission.

Main Results:

• HPTB exhibits a distinct color transition from blue fluorescence to green, yellow, and orange phosphorescence upon stimulation.
• The luminescence interconversion is reversible, allowing the material to return to its original state.
• The observed phenomena are reproducible in both liquid and solid-state conditions.

Conclusions:

• Hexakis(pyridin-4-ylthio)benzene (HPTB) is a versatile luminogen with tunable optical properties.
• The reversible and reproducible nature of HPTB's luminescence changes makes it a promising candidate for sensor applications.
• This study demonstrates a novel approach for designing stimuli-responsive luminescent materials.