C₃-Symmetric Indole-Based Truxenes: Design, Synthesis, and Photophysical Studies.

Area of Science:

• Organic Chemistry
• Materials Science
• Photophysics

Background:

• Truxenes and polyaromatic hydrocarbons (PAHs) are versatile building blocks.
• Interest in PAHs stems from their synthetic accessibility and applications in materials science.

Purpose of the Study:

• To develop an efficient synthesis for novel indolo-truxene hybrid molecules.
• To characterize the synthesized compounds and investigate their photophysical properties.

Main Methods:

• Acid-catalyzed cotrimerization, Friedel-Crafts acylation, and Fischer indole synthesis were employed.
• Spectroscopic techniques (steady-state absorption, fluorescence, time-resolved fluorescence) were used for characterization.
• Density Functional Theory (DFT) and time-dependent DFT (TD-DFT) calculations were performed.

Main Results:

• Various indolo-truxene hybrid molecules were synthesized in good yields (52-90%).
• The photophysical properties of the synthesized compounds were investigated.
• DFT and TD-DFT calculations correlated well with the experimental photophysical data.

Conclusions:

• An ingenious method for constructing indolo-truxene hybrids was established.
• The synthesized compounds exhibit interesting photophysical characteristics.
• Computational studies provide insights into the structure-property relationships of these novel materials.