Related Experiment Video
Updated: Jun 5, 2025
06:08
Time-resolved Photophysical Characterization of Triplet-harvesting Organic Compounds at an Oxygen-free Environment Using an iCCD Camera
Published on: December 27, 2018
8.8K
Nondestructive Testing of Polymer Aging Based on Room-Temperature Phosphorescence.
Qiankun Li1, Xia Huang1, Hui Hou1
1School of Materials Science and Engineering, Chongqing University of Technology, No. 69, Hongguang Avenue, Banan District, Chongqing 400054, P. R. China.
ACS Applied Materials & Interfaces
|December 9, 2024
Summary
Highly efficient polymeric room-temperature phosphorescence (RTP) materials were developed using a green, solvent-free method by embedding phosphors into nylon. These materials show potential for nondestructive testing of nylon aging.
Area of Science:
- Materials Science
- Polymer Chemistry
- Luminescence
Background:
- Polymeric room-temperature phosphorescence (RTP) materials offer processing advantages but face challenges in scalable, green production.
- Developing efficient RTP materials using environmentally friendly methods is crucial for broader applications.
Purpose of the Study:
- To develop highly efficient, industrially viable RTP materials using a simple and green processing strategy.
- To investigate the influence of different nylon matrices on the photophysical properties of RTP materials.
- To explore the potential of these RTP materials for nondestructive testing of nylon aging.
Main Methods:
- A codoping strategy was employed, embedding various phosphors into different nylon polymer matrices.
- The preparation process avoided the use of organic solvents, aligning with green chemistry principles.
- Injection molding was utilized as a scalable processing technique for desolvated RTP materials.
Main Results:
- A series of highly efficient RTP materials were successfully synthesized without organic solvents.
- Achieved phosphorescence lifetime and brightness reached 628.8 ms and 14 cd/m2, respectively.
- Photophysical properties varied significantly with different nylon matrices due to hydrogen bonding differences.
- The developed RTP materials demonstrated potential for nondestructive testing of nylon product aging.
Conclusions:
- The codoping strategy offers a scalable, eco-friendly route to high-performance RTP materials.
- Nylon's unique properties enable the development of RTP materials suitable for monitoring material degradation.
- This work provides a pathway for the industrial production of long-lived RTP materials.
Related Concept Videos
01:14Photoluminescence: Applications
374
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...
374
01:25Fluorescence and Phosphorescence: Instrumentation
540
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.
540
01:26Variables Affecting Phosphorescence and Fluorescence
488
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...
488
01:23Photoluminescence: Fluorescence and Phosphorescence
1.6K
Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...
A pair of electrons in a...
1.6K
01:16Flame Photometry: Lab
213
In a flame photometer, when a solution like potassium chloride is aspirated into the flame, the solvent evaporates, leaving behind dehydrated salt. This salt dissociates into free gaseous atoms in their ground state. Some of these atoms absorb energy from the flame, leading to their excitation. The excited atoms return to the ground state, emitting photons at characteristic wavelengths. Because only electronic transitions are involved, the resulting emission lines are very narrow. The intensity...
213