美国德克萨斯A&M大学Hong-Cai Zhou团队研究出具有高载流子迁移率的导电金属酞菁框架膜作为高效化学电阻。相关研究成果于2021年2月26日发表在国际顶尖学术期刊《德国应用化学》。

二维（2D）晶体框架的导电性较差，极大地限制了其在光电和传感器技术中的应用。

在该研究工作中，研究人员开发了一种基于金属酞菁的导电NiPc-CoTAA框架，该框架与Co（II）四氮杂[14]环烯键相连。整个网络的高共轭性与密集堆垛的金属酞菁相结合，赋予该材料高导电性。此外，碘的掺杂可以大大提高NiPc-CoTAA的导电性。利用蒸汽辅助转化法，可以进一步将NiPc-CoTAA框架制备成100-1000nm不同厚度的薄膜。这些薄膜用于低浓度气体的检测，显示出显著的灵敏度和稳定性。

该研究工作不仅表明了金属酞菁基导电框架在先进的隔离化学传感器中的巨大潜力，而且更重要的是通过定制的分子设计提供了一种通用策略，以实现用于检测低浓度气体的灵敏和稳定的化学传感器。

附：英文原文

Title: Conductive Metallophthalocyanine Framework Films with High Carrier Mobility as Efficient Chemiresistors

Author: Hong-Cai Zhou, Yan Yue, Peiyu Cai, Xiaoyi Xu, Hanying Li, Hongzheng Chen, Ning Huang

Issue&Volume: 2021-02-26

Abstract: The poor electrical conductivity of two‐dimensional (2D) crystalline frameworks greatly limits their utilization in optoelectronics and sensor technology. In this work, we developed a conductive metallophthalocyanine‐based NiPc‐CoTAA framework connected with the Co(II) tetraaza[14]annulene linkage. The high conjugation across the whole network combined with densely stacked metallophthalocyanine endows this material with high electrical conductivity. In addition, the conductivity of NiPc‐CoTAA can be greatly enhanced by doping with iodine. The NiPc‐CoTAA framework can be further fabricated as thin films with different thicknesses from 100 to 1000 nm using the steam‐assisted conversion method. These films were utilized for the detection of low‐concentration gases and exhibited remarkable sensitivity and stability. This work not only indicates the enormous potential of metallophthalocyanine‐based conductive frameworks in advanced stand‐off chemical sensors, but also more significantly supplies a general strategy through the tailor‐make molecular design to achieve sensitive and stable chemical sensors for the detection of low‐concentration gases.

DOI: 10.1002/anie.202100717

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202100717