Related Experiment Video
Updated: Oct 8, 2025
11:26
Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light
Published on: September 12, 2014
12.7K
Ultrahigh Aggregation Induced Emission Efficiency in Multitwist-Based Luminogens under High Pressure
1Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China.
The Journal of Physical Chemistry Letters
|December 28, 2021
Summary
Applying high pressure significantly boosts aggregation-induced emission (AIE) efficiency in multitwist luminogens. This pressure-induced enhancement offers a novel method to improve performance in bioimaging and photoelectric devices.
Area of Science:
- Materials Science
- Photochemistry
- Supramolecular Chemistry
Background:
- Aggregation-induced emission (AIE) is crucial for luminogens in bioimaging and optoelectronics.
- Enhancing AIE efficiency in multitwist-based luminogens is challenging but vital for device performance.
Purpose of the Study:
- To develop a general strategy for significantly increasing AIE efficiency in multitwist-based luminogens.
- To investigate the effect of high pressure on the AIE properties of TDAPA.
Main Methods:
- Investigated the effect of high pressure on tris[4-(diethylamino)phenyl]amine (TDAPA), a multitwist-based luminogen.
- Quantified AIE intensity enhancement and efficiency changes under compression.
- Performed experimental and theoretical investigations to understand the mechanism.
Main Results:
- Achieved a 120.1-fold enhancement in AIE intensity of TDAPA under high pressure.
- Increased AIE efficiency from 0.5% to 46.1% during compression.
- Identified suppression of intramolecular vibration and twisted intramolecular charge transfer as the origin of enhancement.
Conclusions:
- High pressure is an effective and general strategy to significantly increase AIE efficiency in multitwist-based luminogens.
- The findings provide inspiration for improving luminogen performance in lighting and biomedical applications.
- Pressure-induced suppression of molecular dynamics enhances AIE efficiency.
Related Concept Videos
01:14Photoluminescence: Applications
529
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...
529
01:23Photoluminescence: Fluorescence and Phosphorescence
2.4K
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...
2.4K
01:26Variables Affecting Phosphorescence and Fluorescence
632
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...
632
01:37Super-resolution Fluorescence Microscopy
9.3K
Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been...
9.3K
02:39Emission Spectra
69.9K
When solids, liquids, or condensed gases are heated sufficiently, they radiate some of the excess energy as light. Photons produced in this manner have a range of energies, and thereby produce a continuous spectrum in which an unbroken series of wavelengths is present.
69.9K