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Updated: Mar 6, 2026

Measurements of Physiological Stress Responses in C. Elegans

Measurements of Physiological Stress Responses in C. Elegans

Published on: May 21, 2020

Dynamic Phosphorescent Probe for Facile and Reversible Stress Sensing.

Georgy A Filonenko¹, Julia R Khusnutdinova¹

¹Coordination Chemistry and Catalysis Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son, Kunigami-gun, Okinawa, 904-0495, Japan.

Advanced Materials (Deerfield Beach, Fla.)

|March 21, 2017

Summary

A novel dynamic phosphorescent copper complex in polyurethanes offers a reversible stress sensor. This material shows stress-specific photoluminescence changes, enabling optical mapping of stress in polymers.

Keywords:

luminescence macrocyclic ligands mechanical properties polymers sensors

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Area of Science:

Materials Science
Polymer Chemistry
Photophysics

Background:

Deformation sensors commonly rely on bond scission or structural changes.
Existing sensors may lack specificity or reversibility under stress.

Purpose of the Study:

To develop a facile and reversible stress sensor based on dynamic phosphorescence.
To investigate the mechanism of stress response in metalated polymers.

Main Methods:

Incorporation of a dynamic phosphorescent copper complex into polyurethane main chains.
Tensile stress application (5-35 MPa) to metalated polymers and blends.
Monitoring photoluminescence intensity changes using optical imaging.

Main Results:

The dynamic phosphorescent copper complex exhibits a reversible response to tensile stress without bond scission.
Stress-induced suppression of nonradiative relaxation pathways governs the photoluminescence response.
A nearly twofold increase in photoluminescence intensity was observed under 5-35 MPa stress.
The sensor demonstrated stress specificity.

Conclusions:

Dynamic phosphorescent polyurethanes serve as effective stress sensors.
The sensor allows for optical mapping of stress distribution and tracking of dynamic phenomena in polymers.