Dual-emitting MOF⊃dye composite for ratiometric temperature sensing.

Area of Science:

• Materials Science
• Chemistry
• Nanotechnology

Background:

• Accurate temperature monitoring is crucial in biological and chemical applications.
• Developing ratiometric sensors offers advantages in signal stability and self-calibration.
• Luminescent materials, particularly metal-organic frameworks (MOFs) and organic dyes, are promising for sensing applications.

Purpose of the Study:

• To develop a novel ratiometric thermometer with high sensitivity and stability.
• To utilize the unique properties of europium-metal-organic frameworks (MOFs) and perylene dye for temperature sensing.
• To investigate the temperature-dependent luminescence characteristics of the developed MOF⊃dye composite.

Main Methods:

• Encapsulation of luminescent perylene dye within the pores of a europium-based metal-organic framework (MOF).
• Characterization of the synthesized MOF⊃dye composite using relevant analytical techniques.
• Measurement of luminescence intensity ratio as a function of temperature across the physiological range.

Main Results:

• The developed MOF⊃dye composite functions as an effective ratiometric thermometer.
• The thermometer exhibits a highly temperature-dependent luminescence intensity ratio.
• A maximum sensitivity of 1.28% °C(-1) was achieved at 20 °C within the physiological temperature range.

Conclusions:

• The strategy of encapsulating luminescent perylene dye into a europium MOF provides a viable route for creating ratiometric thermometers.
• The MOF⊃dye material demonstrates excellent potential for accurate and reliable temperature sensing in physiological conditions.
• This work contributes to the advancement of luminescent-based temperature sensing technologies.