具有高内在导电性的二维化学电阻共价有机框架
Zheng Meng1, Robert M Stolz1, Katherine A Mirica1
1Department of Chemistry, Burke Laboratory , Dartmouth College , Hanover , New Hampshire 03755 , United States.
Journal of the American Chemical Society
|June 27, 2019
概括
研究人员合成了一种新的导电二维共价有机框架 (COF) 材料,COF-DC-8. 这种材料具有出色的气体检测能力,
科学领域:
- 材料科学
- 纳米技术
- 化学学
背景情况:
- 二维 (2D) 材料具有独特的电子特性.
- 共价有机框架 (COF) 是具有可调节结构的晶体多孔聚合物.
- 在先进的电子应用中,开发具有内在导电性的COF至关重要.
研究的目的:
- 合成一种新型的内在导电二维COF.
- 为了研究合成的COF的气体感应特性.
- 为了阐明COF气体感应的机制.
主要方法:
- 尼克尔 (II) 八氨甲和-4,5,9,10-四之间的芳香取消反应.
- 在 (I2) 兴奋剂注射之前和之后的电导度测量.
- 用于气体传感的化学阻抗装置的制造.
- 电子结构计算
- 电子磁共振 (EPR) 和X射线光电子光谱 (XPS) 分析.
主要成果:
- 一种新型的内在导电二维COF,COF-DC-8,已成功合成.
- COF-DC-8表现出 2.51 × 10−3 S/m 的内在质导率,在 I2 兴奋剂时增加了三倍.
- 这种材料在检测各种气体 (NH3,H2S,NO,NO2) 时具有很高的灵敏度和选择性.
- 电子计算表明带结构可能有助于导电性.
- 研究表明,分析物和甲成分之间的电荷转移相互作用是传感机制的原因.
结论:
- 合成的COF-DC-8是一种有前途的导电材料,用于气体传感应用.
- 这种材料的导电性和气体传感性能可以通过剂显著提高.
- 甲单元在气体检测中的电荷转移机制中起着关键作用.
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