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Solvent-induced conformational changes in color-tunable hydrogen-bonded organic frameworks
Longhao Hu1, Chaohui Lin1, Dailin Zeng1
1Fujian Key Laboratory of Polymer Materials, College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350117, People's Republic of China. gonglingshan@fjnu.edu.cn.
Researchers developed color-tunable hydrogen-bonded organic frameworks (HOFs) with identical building blocks emitting green and orange light. Structural changes significantly altered emission wavelengths, offering insights into HOFs
Area of Science:
- Materials Science
- Supramolecular Chemistry
- Photophysics
Background:
- Hydrogen-bonded organic frameworks (HOFs) are crystalline materials formed through hydrogen bonding interactions.
- Tuning the emission color of HOFs is crucial for applications in sensing and optoelectronics.
- Controlling HOF structure to achieve desired optical properties remains a challenge.
Purpose of the Study:
- To design and synthesize conformationally-induced, color-tunable HOFs.
- To investigate the relationship between structural variations and emission color in HOFs.
- To provide insights into the mechanisms of emission regulation in HOFs.
Main Methods:
- Synthesis of HOFs using identical building blocks.
- Characterization of HOF structures and properties.
- Spectroscopic analysis to determine emission wavelengths and investigate conjugation and energy gap variations.
Main Results:
- A pair of HOFs were successfully synthesized using identical building blocks.
- Distinct green and orange emission colors were observed for the two HOFs.
- A significant emission wavelength shift of up to 60 nm was achieved, linked to conjugation and energy gap changes.
Conclusions:
- Conformational changes in HOFs can effectively tune their emission color.
- Structural regulation plays a key role in controlling optical properties of HOFs.
- These findings advance the understanding of emission mechanisms in HOFs for potential applications.
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