Control of the molecular orientation and of electronic interface properties of polar phthalocyanines in thin films by interface engineering and external fields

该项目的中心目标是控制薄膜中极性酞菁的电子界面性质以及取向和有序性。这个项目的另一个更普遍的目的是更好地理解极性酞菁薄膜中自组织现象的本质。为此，主要跟踪两种方法。首先，在界面处，化学反应性是变化的，目的是通过特定的局部键合来连接酞菁分子。第二，在生长过程中和生长后的外部电场和磁场的影响的取向和有序。极性酞菁由于其化学反应性和通过外部因素（如电场）改变生长条件的绝佳机会而特别重要。我们选择专门合成的酞菁类分子来研究分子性质（如偶极矩或反应性）与其生长和电子性质之间的相关性。我们的研究将使用互补的光谱技术（电子和X射线光谱，光学光谱以及显微镜），应产生广泛和详细的实验信息，这些物理特性进行。

The central goal of the project is the control of electronic interface properties as well of the orientation and ordering of polar phthalocyanines in thin films. A further, more general aim of this project is to achieve an improved understanding of the nature of self-organization phenomena in films of polar phthalocyanines. For this purpose, two approaches are mainly tracked. First, at interfaces the chemical reactivity is varied with the aim to attach phthalocyanine molecules by specific local bonding. Second, the orientation and ordering is affected during the growth and post-growth by external electrical and magnetic fields. Polar phthalocyanines are of particular importance due to their chemical reactivity and due to the excellent opportunity to alter growth conditions by external factors, such as electric fields.We choose specially synthesized molecules of the class of phthalocyanines to study correlations between molecular properties such as dipole moments or reactivity and their growth and electronic properties. Our studies will be carried out using complementary spectroscopic techniques (electron and x-ray spectroscopy, optical spectroscopy as well as microscopy) that shall yield wide and detailed experimental information on these physical properties.