Related Experiment Video
Updated: Mar 21, 2026
07:59
Synthesis and Characterization of Multi-Modal Phase-Change Porphyrin Droplets
Published on: October 15, 2021
4.1K
Fluorescent liquid pyrene derivative-in-water microemulsions
M J Hollamby1, A E Danks2, Z Schnepp2
1School of Physical and Geographical Sciences, Keele University, Keele, Staffordshire, ST55BG, UK. m.hollamby@keele.ac.uk.
Chemical Communications (Cambridge, England)
|May 20, 2016
Summary
Researchers developed stable luminescent microemulsions using a highly fluorescent liquid pyrene derivative. Adjusting pyrene concentration altered droplet size, shifting emission color via excimer formation.
Area of Science:
- Materials Science
- Photochemistry
- Colloid and Surface Chemistry
Background:
- Fluorescent materials are crucial for sensing and imaging applications.
- Developing stable luminescent systems in aqueous media presents challenges.
- Pyrene derivatives offer tunable photophysical properties.
Purpose of the Study:
- To synthesize a novel fluorescent liquid pyrene derivative.
- To create stable luminescent oil-in-water microemulsions using this derivative.
- To investigate the effect of pyrene loading on microemulsion structure and photoluminescence.
Main Methods:
- Synthesis of a liquid pyrene derivative with high fluorescence quantum yield.
- Preparation of oil-in-water microemulsions with the pyrene derivative as the sole oil phase.
- Small-angle neutron scattering (SANS) for droplet size analysis.
- Photoluminescence spectroscopy to study emission properties.
Main Results:
- A liquid pyrene derivative with 65% fluorescence quantum yield was synthesized.
- Stable luminescent microemulsions were successfully prepared.
- SANS confirmed droplet swelling with increased pyrene loading.
- Photoluminescence showed a red shift in emission due to enhanced pyrene excimer contribution.
Conclusions:
- The developed liquid pyrene derivative is suitable for creating luminescent microemulsions.
- Microemulsion droplet size and photophysical properties are controllable via pyrene concentration.
- This system offers potential for tunable luminescent materials and probes.
Related Concept Videos
01:14Photoluminescence: Applications
1.2K
Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
1.2K
01:25Fluorescence and Phosphorescence: Instrumentation
1.8K
Fluorometers and spectrofluorometers are two types of instruments used for measuring molecular fluorescence. These instruments differ in how they select excitation and emission wavelengths and the type of light sources they utilize. Fluorometers use absorption interference filters to choose excitation and emission wavelengths. The excitation source in a fluorometer is typically a low-pressure mercury vapor lamp that emits intense lines distributed throughout the ultraviolet and visible regions.
1.8K
01:26Variables Affecting Phosphorescence and Fluorescence
1.8K
Fluorescence and phosphorescence are essential phenomena in fields like analytical chemistry, biological imaging, and materials science, where they detect molecular properties and visualize cellular structures. Understanding the variables that influence these luminescent behaviors is crucial for maximizing accuracy and efficiency in their applications. These variables can broadly be grouped into chemical structure, solvent properties, and external conditions, each playing a distinct role in...
1.8K
01:05Total Internal Reflection Fluorescence Microscopy
13.7K
Total internal reflection fluorescence microscopy or TIRF is an advanced microscopic technique used to visualize fluorophores in samples close to a solid surface with a higher refractive index, such as a glass coverslip. TIRF only allows fluorophores in proximity to the solid surface to be excited. When light from a medium with a lower refractive index (such as air) hits the glass coverslip at a critical angle, the light undergoes total internal reflection stead of passing through the glass.
13.7K