Triphenylmethane-based single-component Ultralong room temperature phosphorescence.

Area of Science:

• Materials Science
• Organic Chemistry
• Photophysics

Background:

• Triphenylmethane (TPM) dyes are a significant class of commercial colorants with diverse industrial applications.
• Existing TPM dyes have applications in dying, aquaculture, cell staining, and analytical chemistry.
• The development of novel organic materials with advanced photophysical properties is an active research area.

Purpose of the Study:

• To synthesize and characterize a simple triphenylmethane derivative exhibiting ultralong room temperature phosphorescence (RTP) in ambient conditions.
• To investigate the photophysical properties, including phosphorescence lifetime and efficiency, of the synthesized compound.
• To explore the structural factors influencing RTP in triphenylmethane derivatives.

Main Methods:

• Synthesis of Tris(2-methoxyphenyl)methane (TMPM).
• Measurement of phosphorescence lifetimes and efficiencies in crystal and solution states.
• Single crystal X-ray diffraction analysis.
• Theoretical calculations to understand structure-property relationships.

Main Results:

• Tris(2-methoxyphenyl)methane (TMPM) demonstrated ultralong room temperature phosphorescence (RTP) with lifetimes of 0.74 s (crystal) and 1.15 s (solution).
• The phosphorescence efficiency was measured at 5.3%.
• Single crystal analysis and theoretical calculations suggest that molecular packing in the solid state influences RTP.

Conclusions:

• A novel triphenylmethane derivative, TMPM, exhibits significant ultralong room temperature phosphorescence (RTP).
• The findings suggest that molecular packing plays a crucial role in achieving RTP in solid-state triphenylmethane derivatives.
• This work may broaden the applications of TPM dyes and advance research in ultralong organic phosphorescence (UOP).