Trinaphthylamines as robust organic materials for two-photon-induced fluorescence

Area of Science:

• Organic Chemistry
• Materials Science
• Photophysics

Background:

• Two-photon absorption (TPA) is crucial for advanced optical applications.
• Developing novel materials with enhanced TPA cross-sections is an active research area.
• Push-pull octupolar systems are promising for nonlinear optical properties.

Purpose of the Study:

• To synthesize and characterize a novel series of pi-conjugated trinaphthylamines.
• To investigate their two-photon absorption properties.
• To compare their performance with existing triphenylamine analogues.

Main Methods:

• Chemical synthesis of novel trinaphthylamine derivatives.
• Spectroscopic measurements to determine two-photon action cross-section (sigma phi).
• Computational analysis to understand structure-property relationships.

Main Results:

• Successful synthesis of a new class of push-pull octupolar trinaphthylamines.
• Achieved large two-photon action cross-sections (sigma phi up to 510 GM).
• Demonstrated a 2-3 fold increase in TPA properties compared to triphenylamines.

Conclusions:

• The novel trinaphthylamines exhibit superior two-photon absorption.
• The enhanced properties are attributed to the stronger donor character of the trinaphthyl core.
• These findings open avenues for new nonlinear optical materials.