一维、二维金属杂稠环芳烃及金属杂纳米石墨烯的合成及性质研究

稠环芳烃及纳米石墨烯是石墨烯结构的一部分，具有大的共轭结构和重要的物理化学性质，在分子电子器件等领域具有巨大的应用前景。用过渡金属原子取代稠环芳烃及纳米石墨烯芳环骨架中的部分碳原子，可形成一类新的稠环芳烃分子—金属杂稠环芳烃及金属杂纳米石墨烯。由于过渡金属的引入，将产生如下影响：（1）过渡金属种类多及其上配体的变化，将获得大量新的稠环芳烃，大大拓展传统稠环芳烃及纳米石墨烯体系；（2）过渡金属价态多、有未充满d轨道，能有效改变分子的电子性质，产生一些独特光、电、磁性能；（3）一个金属上有多个配体，易通过改变配体调控分子功能和溶解度，获得理想功能材料分子。本项目拟将过渡金属替代稠环芳烃中的碳，构建一维、二维金属杂稠环芳烃和金属杂纳米石墨烯，研究其光电性质，发展合成大的金属杂稠环芳烃新方法，通过金属及配体调节，获得高稳定性、良好溶解性及具独特光电性质的分子，为光电材料的发展提供新的功能材料分子。

Polycyclic aromatic hydrocarbons (PAHs) and nanographenes, are subunits of carbon-based nanomaterials. The physical and chemical properties of PAHs arise from their unique large conjugation structures, enables PAHs to exhibit significant potential application in molecular electronic devices. Polycyclic metalla-aromatics and metalla-nanographenes, in which one or more carbons within the aromatic ring are replaced by one or more transition metals and its ancillary ligands, represent a new type of nanomaterials. The benefits caused by the introduction of transition metal atoms including: (1) By using different transition metal atoms and ligands, we can create different kinds of novel PAHs and nanographenes; (2) Due to the multiple valence states and empty d orbitals of transition metal atoms, polycyclic metalla-aromatics and metalla-nanographenes will display unique optical, electrical and magnetic properties; (3) The abundant coordinative chemistry of transition metals provides an efficient way to tune the solubility and functionality of metallic PAHs and nanographenes. This proposal is to explore the synthesis of one- and two-dimensional polycyclic metalla-aromatics and metalla-nanographenes, and tune their optoelectronic properties. We aim to develop new synthetic strategies for the large polycyclic metallaaromatics. We expect to acquire a series of polycyclic metalla-aromatics and metalla-nanographenes with good solubility, highly stable, and promising optoelectronic properties, which can be used in molecular electronic devices.