研究目的
Investigating the spatiotemporal control of aggregation-induced emission enhancement (AIEE) of a protonated tetraphenylethene derivative by optical manipulation.
研究成果
The study demonstrates that optical manipulation can spatiotemporally control the AIEE of a protonated tetraphenylethene derivative by overcoming electrostatic repulsion between molecules, leading to enhanced fluorescence emission. The activation of AIEE is arbitrarily controllable by alternating the laser power, providing a new method to investigate the dynamics and mechanism of AIEE phenomena.
研究不足
The study is limited by the optical resolution in observing the structural evolution from trapped molecules to aggregates or crystals. The thermal effects and photochemical reactions induced by laser irradiation are considered but found to have limited impact on the emission enhancement.
1：Experimental Design and Method Selection:
The study employs optical manipulation to control the aggregation and fluorescence emission of a protonated tetraphenylethene derivative. The methodology includes the use of a tightly focused laser beam to trap and manipulate the molecules.
2：Sample Selection and Data Sources:
The sample used is a protonated tertiary ammonium-appended tetraphenylethene (TA-TPE) in acidic solution.
3：List of Experimental Equipment and Materials:
A 1064-nm manipulation laser, objective lens with high numerical aperture, CCD cameras for imaging, and fluorescence microspectroscopy setup.
4：Experimental Procedures and Operational Workflow:
The experiment involves trapping a single aggregate of TA-TPE at the laser focus, followed by continuous irradiation to observe aggregation and fluorescence emission changes. The laser power is alternated to control the AIEE activation.
5：Data Analysis Methods:
Fluorescence intensity and spectral changes are analyzed to understand the dynamics and mechanism of AIEE activation.
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