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Gas-Induced Ion-Free Stable Radical Anion Formation of Organic Semiconducting Solids as Highly Gas-Selective Probes
- Gas-Induced Ion-Free Stable Radical Anion Formation of Organic Semiconducting Solids as Highly Gas-Selective Probes
- Lee, Seung-Heon; Oh, Byeong M.; Hong, Chan Yoo; Jung, Su-Kyo; Park, Sung-Ha; Jeon, Gyeong G.; Kwon, Young-Wan; Jang, Seokhoon; Lee, Youngu; Kim, Dongwook; Kim, Jong H.; Kwon, O-Pil
- DGIST Authors
- Lee, Youngu
- Issue Date
- ACS Applied Materials and Interfaces, 11(39), 35904-35913
- Article Type
- Author Keywords
- stable radical anion formation; organic field-effect transistor; gas sensors; naphthalene diimide; pi-electron-deficient aromatic cores
- ELECTRON-TRANSFER; NAPHTHALENE-DIIMIDE; AMMONIA SENSORS; CHARGE-TRANSFER; TRANSISTOR; NH3; PERYLENE
- The formation of stabilized radical anions on organic materials in the solid state is an important issue in radical-based fundamental research and various applications. Herein, for the first time, we report on gas-induced ion-free stable radical anion formation (SRAF) of organic semiconducting solids with high gas selectivities through the use of organic field-effect transistor (OFET) gas sensors and electron spin resonance spectroscopy. In contrast to the previously reported SRAF, which requires either anionic analytes in solution and/or cationic substituents on π-electron-deficient aromatic cores, NDI-EWGs consist of an n-type semiconducting naphthalene diimide (NDI) and various electron-withdrawing groups (EWGs) that exhibit non-ion-involved, gas-selective SRAF in the solid state. In the presence of hard Lewis base gases, NDI-EWG-based OFETs exhibit enhanced conductivity (Current-ON mode) through the formation of an SRAF NDI/gas complex, while in the presence of borderline and soft Lewis base gases, NDI-EWG-based OFETs show decreased conductivity (Current-OFF mode) by the formation of a resistive NDI/gas complex. Organic semiconducting solids with EWGs exhibiting highly gas-selective solid-SRAF constitute a very promising platform for radical-based chemistry and can be used in various applications, such as highly gas-selective probes. © 2019 American Chemical Society.
- American Chemical Society
- Related Researcher
Organic & Printed Electronics Laboratory(OPEL)
OTF Solar cell; OLED; Printed Electronics; 유기박막형 태양전지
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- Department of Energy Science and EngineeringOrganic & Printed Electronics Laboratory(OPEL)1. Journal Articles
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