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Nonconventional Luminescence Enhanced by Silicone-Induced Aggregation
Hang Lu1, Ziqi Hu2, Shengyu Feng1
1Key Laboratory of Special Functional Aggregated Materials & Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, P.R. China.
Chemistry, an Asian Journal
|April 4, 2017
Summary
The study shows that silicon-oxygen (Si-O) units significantly enhance fluorescence emission in organic luminogens. Siloxane derivatives exhibit strong fluorescence, unlike similar carbon compounds, due to Si-O coordination bonds.
Area of Science:
- Organic chemistry
- Materials science
- Photophysics
Background:
- Nonconventional organic luminogens offer unique properties and applications.
- Previous research suggests silicon-oxygen (Si-O) incorporation can boost luminogen fluorescence.
- Understanding the precise role of Si-O units is crucial for designing advanced fluorescent materials.
Purpose of the Study:
- To investigate the impact of Si-O units on the fluorescence emission of organic luminogens.
- To compare the photophysical properties of siloxane derivatives with similar molecules lacking Si-O units.
- To elucidate the mechanism behind Si-O enhanced fluorescence.
Main Methods:
- Synthesis of fluorescent siloxane derivatives and control carbon compounds.
- Photophysical characterization including UV/Vis absorption and fluorescence spectroscopy.
- Structural analysis using nuclear magnetic resonance (NMR) spectroscopy.
- Computational analysis using theoretical calculations.
Main Results:
- Siloxane derivatives displayed strong fluorescence emission in dilute solutions.
- Similar organic compounds without Si-O units showed significantly weaker or no fluorescence.
- Spectroscopic and computational data confirmed the formation of coordination bonds between heteroatoms and Si-O units in siloxanes.
- These coordination bonds are directly linked to the enhanced fluorescence.
Conclusions:
- The Si-O unit plays a critical role in enhancing the fluorescence emission of organic luminogens.
- The formation of coordination bonds involving Si-O units is the primary mechanism for this enhancement.
- This finding provides valuable insights for the rational design of novel, highly fluorescent organic materials.