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Capturing the Interplay Between TADF and RTP Through Mechanically Flexible Polymorphic Optical Waveguides.

Avulu Vinod Kumar¹, Pradip Pattanayak², Ankur Khapre¹

¹Advanced Photonic Materials and Technology Laboratory, School of Chemistry and Centre for Nanotechnology, University of Hyderabad, Prof. C. R. Rao Road, Gachibowli, Hyderabad, 500046, Telangana, India.

Angewandte Chemie (International Ed. in English)

|June 26, 2024

Summary

This summary is machine-generated.

This study presents two polymorphs of TPA-CHO crystals with distinct green (TADF) and orange (RTP) emissions. Mechanophotonics controlled light interaction between these polymorphs for photonic applications.

Keywords:

flexible crystals mechanophotonics optical waveguides photophysical properties polymorphism

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Area of Science:

Materials Science
Organic Chemistry
Photophysics

Background:

Molecular polymorphism enables diverse material properties from a single compound.
Organic crystals are explored for advanced optical and mechanical applications.

Purpose of the Study:

To investigate two distinct polymorphs of TPA-CHO: green (GY) and orange (OR) emissive crystals.
To explore the interplay between thermally activated delayed fluorescence (TADF) and room temperature phosphorescence (RTP) in these polymorphs.
To demonstrate the potential for polymorphic crystals in photonic circuit technologies.

Main Methods:

Synthesis and characterization of two TPA-CHO polymorphs (GY and OR).
Utilizing AFM-tip-based mechanophotonics to manipulate crystal waveguides.
Controlling optical path length to study TADF and RTP interactions.

Main Results:

GY crystals exhibit thermally activated delayed fluorescence (TADF).
OR crystals display room temperature phosphorescence (RTP).
Both polymorphs show mechanical flexibility and optical waveguiding properties.
Controlled light interaction between GY and OR waveguides was achieved.

Conclusions:

Polymorphism in TPA-CHO yields distinct photophysical properties (TADF and RTP).
Mechanophotonics offers a method to control light propagation and interaction in organic crystals.
This work provides a pathway for developing advanced polymorphic crystal-based photonic circuits.