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Related Experiment Video

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Fluorescent Leakage Assay to Investigate Membrane Destabilization by Cell-Penetrating Peptide

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Temperature responsive phosphorescent small unilamellar vesicles.

Mouchumi Bhuyan¹, Burkhard Koenig

¹Institut für Organische Chemie, Universität Regensburg, Regensburg, 93040, Germany.

Chemical Communications (Cambridge, England)

|June 21, 2012

Summary

Self-assembled lipid vesicles containing terbium(III) complexes exhibit temperature-dependent phosphorescence. This property is sensitive to temperature changes within the physiological range, indicating potential for thermal sensing applications.

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Area of Science:

Supramolecular Chemistry
Materials Science
Biophysical Chemistry

Background:

Lipid vesicles are versatile self-assembled structures with applications in drug delivery and biomimicry.
Lanthanide complexes, particularly terbium(III), are known for their luminescent properties.
Developing responsive materials for sensing applications is an active area of research.

Purpose of the Study:

To investigate the temperature-dependent luminescent behavior of amphiphilic terbium(III) complexes embedded within self-assembled lipid vesicles.
To explore the potential of these hybrid materials as temperature sensors in the physiological range.

Main Methods:

Synthesis and characterization of amphiphilic terbium(III) complexes.
Self-assembly of lipid vesicles incorporating the terbium(III) complexes.
Measurement of phosphorescence intensity and lifetime as a function of temperature.

Main Results:

The embedded terbium(III) complexes within lipid vesicles demonstrated a significant and strong dependence of their phosphorescence on temperature.
Both phosphorescence intensity and lifetime showed clear variations within the physiological temperature range (approximately 20-42 °C).
The observed changes suggest a direct correlation between the luminescence properties and the surrounding temperature.

Conclusions:

Self-assembled lipid vesicles functionalized with amphiphilic terbium(III) complexes can act as effective luminescent thermometers.
The strong temperature sensitivity in the physiological range highlights their potential for biological and medical temperature monitoring applications.
This work presents a novel approach for developing smart responsive materials based on lanthanide-doped lipidic nanostructures.