Institute of Physical and Theoretical Chemistry, University of Tübingen , Auf der Morgenstelle 18, D-72076 Tübingen, Germany.
Department of Chemistry, University of Nebraska , Lincoln, Nebraska 68588-0304, United States.
ACS Appl Mater Interfaces. 2016 Jan 27;8(3):1805-12. doi: 10.1021/acsami.5b09693. Epub 2016 Jan 15.
Organic radicals are fascinating materials because of their unique properties, which make them suitable for a variety of applications. Their synthesis may be challenging, and big efforts have focused on chemical stability. However, introducing a new material in electronics not only requires chemically stable molecules but also stable monolayers and thin films in view of their use in devices. In this work, we have investigated the thin films of a derivative of the Blatter radical that was synthesized bearing in mind the thermodynamic factors that govern thin film stability. We have proved our concept by investigating the electronic structure, the paramagnetic character, and stability of the obtained films under UHV and ambient conditions by in situ X-ray photoelectron spectroscopy, ex situ atomic force microscopy, and electron paramagnetic resonance spectroscopy.
有机自由基是一类引人入胜的材料，因为其具有独特的性质，使它们适用于各种应用。它们的合成可能具有挑战性，因此人们投入了大量的努力来提高其化学稳定性。然而，在电子学中引入一种新材料，不仅需要化学稳定的分子，而且需要在器件应用方面具有稳定的单层和薄膜。在这项工作中，我们研究了 Blatter 自由基衍生物的薄膜，考虑到控制薄膜稳定性的热力学因素，我们在合成时加入了这些因素。我们通过原位 X 射线光电子能谱、非原位原子力显微镜和电子顺磁共振波谱研究了所获得的薄膜的电子结构、顺磁性质和在超高真空和环境条件下的稳定性，从而验证了我们的概念。
