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129th General Meeting of Korean Chemical Society & Exposition Chemiresistive gas sensor based on light promoted-COF film

Submission Date :
2 / 27 / 2022 , 20 : 01 : 16
Abstract Number :
Presenting Type:
Poster Presentation
Presenting Area :
Material Chemistry
Authors :
Seungcheol Kim, Hyunseob Lim1,*
Chemistry, Gwangju Institute of Science and Technology, Korea
1Department of Chemistry, Gwangju Institute of Science and Technology, Korea
Assigned Code :
MAT.P-664 Assigend Code Guideline
Presenting Time :
April 14 (THU) 11:00~13:00
Covalent organic framework (COF) has been widely investigated for a variety of applications such as gas storage, catalysis, and sensor due to its high surface area, crystalline porous structure, modifiable functionality, and stability. Generally, to synthesize the COF, solvothermal method which utilizes thermal energy to form crystalline COF has been usually used. However, this method requires very long time and gives insoluble powder form. Long time consuming is not proper in perspective of efficiency and this insoluble COF powder is difficult to process, which makes difficult to fabricate device. Thus, we have introduced light source to synthesize COF highly fast and liquid-air interface which is a 2D-confined platform for 2D COF film. Herein, we synthesized imine based COF film on the water surface using Xe lamp and fabricated chemiresistive gas sensor device. 1,3,5-Tris(4-aminophenyl)-benzene (TAPB) and terephthaldehyde (PDA) were used to form imine based COF in which nitrogen atom may be adsorption site for some gas molecules having possibility for hydrogen bonding. We have been guessing hydrogen bonding based interaction make intramolecular charge transfer possible.