Solid‐State Oxygen and Hydrogen Sensing Devices Based on Copper Dicyanoanthraquinone Diimines

Chong Mou Wang, Huh‐Lerng ‐L Lin, Wehn‐Ying ‐Y Wang, Hwang Yaw Cheng, Lilian Kao Liu

研究成果: 雜誌貢獻文章同行評審

摘要

Substituted dicyanoanthraqumone diimines (DCNAQI) and their related copper complexes, Cu(DCNAQI), have been synthesized and characterized. Most Cu(DCNAQI) complexes possess an activation energy 80–400 meV and strongly absorb in the IR range. Electrochemical investigations with polycrystailine electrodes as thin films reveal that Cu(DCNAQI) behaves as an n‐type semiconductor. Under bandgap excitation (4000 cm−1), the photoconductance measured with these Cu(DCNAQI) electrodes was greatly promoted under nitrogen, but very sensitive to O2 or H2. When the conductance difference, Δσ/σdark = (σlight ‐ σ darkdark, was plotted vs the partial pressure of the target molecule, a nearly linear relationship was observed. Among Cu(DCNAQI), Cu(β‐methyl‐DCNAQI) gave the greatest senstivity for detection of hydrogen, but Cu(α,α′‐dichloro‐DCNAQI) appeared most sensitive toward oxygen. This remarkable relationship is likely due to retardation of the mobility of electron or hole by interaction with oxygen or hydrogen at the Cu(DCNAQI) electrode surface; a solid‐state oxygen/hydrogen sensing device based on these organic semiconductors is proposed.

原文英語
頁(從 - 到)345-350
頁數6
期刊Journal of the Chinese Chemical Society
41
發行號3
DOIs
出版狀態已發佈 - 1994 六月

ASJC Scopus subject areas

  • Chemistry(all)

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