Gas-Induced Ion-Free Stable Radical Anion Formation of Organic Semiconducting Solids as Highly Gas-Selective Probes
- Authors
- 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
- Issue Date
- 2-10월-2019
- Publisher
- AMER CHEMICAL SOC
- Keywords
- stable radical anion formation; organic field-effect transistor; gas sensors; naphthalene diimide; pi-electron-deficient aromatic cores
- Citation
- ACS APPLIED MATERIALS & INTERFACES, v.11, no.39, pp.35904 - 35913
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACS APPLIED MATERIALS & INTERFACES
- Volume
- 11
- Number
- 39
- Start Page
- 35904
- End Page
- 35913
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/62550
- DOI
- 10.1021/acsami.9b12222
- ISSN
- 1944-8244
- Abstract
- 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 pi-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.
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Collections - Graduate School > KU-KIST Graduate School of Converging Science and Technology > 1. Journal Articles
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