Three-Dimensional Tetrathiafulvalene-Based Covalent Organic Frameworks for Tunable Electrical Conductivity.
Hui Li1, Jianhong Chang1, Shanshan Li1
1State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University , Changchun 130012 , People's Republic of China.
Journal of the American Chemical Society
|August 11, 2019
Summary
Researchers developed new 3D tetrathiafulvalene-based covalent organic frameworks (3D-TTF-COFs). These electroactive materials exhibit tunable conductivity, paving the way for advanced molecular electronics and energy storage applications.
Area of Science:
- Materials Science
- Organic Chemistry
- Nanotechnology
Background:
- Functionalization of 3D covalent organic frameworks (COFs) is crucial for expanding their applications.
- Incorporating electroactive organic groups into 3D COFs remains a significant challenge.
Purpose of the Study:
- To report the first synthesis of 3D tetrathiafulvalene-based COFs (3D-TTF-COFs).
- To investigate their electrochemical activity and electrical conductivity.
Main Methods:
- Synthesis of 3D-TTF-COFs with non- or 2-fold interpenetrated pts topology.
- Characterization of crystallinity, porosity, and surface area.
- Evaluation of redox activity and electrical conductivity via iodine doping.
Main Results:
- Achieved highly crystalline 3D-TTF-COFs with permanent porosity and high surface area (up to 3000 m²/g).
- Demonstrated tunable electrochemical activity and redox behavior.
- Obtained tunable electric conductivity up to 1.4 × 10⁻² S cm⁻¹ at 120 °C through iodine doping.
Conclusions:
- Successfully designed and synthesized novel 3D electroactive COF materials.
- These 3D-TTF-COFs show promise for applications in molecular electronics and energy storage.
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