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| Type |
Oral Presentation |
| Area |
Oral Presentation of Young Material Chemists |
| Room No. |
Room 322 |
| Time |
THU 09:21-: |
| Code |
MAT.O-4 |
| Subject |
Rapid and highly Efficient Synthesis of a Scalable Two-Dimensional Covalent Organic Framework (COF) by Photon-assisted Imine Condensation Reaction on the Water Surface |
| Authors |
Soyoung Kim, Hyunseob Lim1, Jinho Lee, Hee Cheul Choi*
Department of Chemistry, Institute for Basic Scien, Pohang University of Science and Technology, Korea
1Department of Chemistry, Chonnam National University, Korea
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| Abstract |
An atomically thin two-dimensional (2D) covalent organic framework (COF) was successfully synthesized via photon-assisted imine condensation reaction within 1 h from the highly uniform and homogeneous precursor solution layer floating on the water surface. The polarity optimization of the precursor solution was the key for the successful formation of the high quality two-dimensional COF (2D COF) because only the precursor solution made of polarity-controlled solvents allows the ideal floating on the water surface. The polarity-controlled solution not only prohibits the agglomeration of the organic precursors on the water surface, but also facilitates the wafer scale and layer number-controllable synthesis of 2D COF. Our film shows uniformly porous, layered structure, of which layers align along the out-of-plane direction, as confirmed by atomic force microscopy (AFM), transmission electron microscopy (TEM), and grazing-incidence wide-angle X-ray scattering (GIWAXS). In addition, we successfully fabricated pi-COF thin film transistor-type electronic devices which show quite prompt electrical responses to photo and water vapor exposure. We believe that our findings would contribute to the development of novel synthetic methods of various two-dimensional COF films on the water surface and provide a new insight into practical applications of COF films in electronics. |
| E-mail |
ksy0457@postech.ac.kr |
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122nd General Meeting of the KCS