含硫有机物的表面配位及反应研究

掺杂是调节材料性能的重要手段，以含有氮、氧、硫、磷等杂原子的前体分子通过超高真空表面反应，原位制备功能纳米材料，具有重要研究意义。目前，含氧和含氮有机物的表面配位和反应已有一定的研究积累，但含硫有机物仍然报道较少。含硫有机物是一类重要的有机化合物，在生物、医药、化工及光电子器件领域有着广泛的应用。本项目拟围绕含硫有机物如硫醇、硫酚、硫醚、噻吩、噻唑等在超高真空表面的吸附组装、金属配位及反应过程展开，重点研究（1）含硫有机半导体分子π平面和衬底夹角的可控调节；（2）不同含硫有机物分子组装构型差异，和金属原子的表面配位过程等；（3）含硫有机物在超高真空环境下的表面反应过程，深入理解其反应机理及调控手段，可控制备低维含硫纳米材料，探索其应用前景。本项目旨在扩展现有表面反应类型，为掺杂低维纳米材料的精准合成及应用打下基础。

Doping is an important way to regulate the properties of materials. It is of great significance to prepare functional nanomaterials in situ by means of on-surface reactions between precursor molecules containing heteroatoms such as nitrogen, oxygen, sulfur and phosphorus. At present, surface coordination and reaction of oxygen-containing and nitrogen-containing organics have been studied, but a systematic research concerning on-surface chemistry of organosulfur compounds is still lacking. Organosulfur compounds is a kind of highly important organics with widely applications in biology, medicine, chemical industry and optoelectronic devices. In this project, we are planned to explore the self-assembly structures, on-surface coordination and reactions of all kinds of organosulfur compounds such as thiol, thiophenol, thioether, thiophene, thiazole in ultra-high vacuum. Our research will focus on three aspects: (1) explore the control methods of the angle between the organosulfur molecule π-plane and the substrate; (2) examine the self-assembly structures and coordination processes of different organosulfur compounds; (3) understand the various on-surface reaction processes of organosulfur compounds and construct low dimensional s-doped nanomaterials with atomic accuracy. With the help of surface characterization techniques, we can explore the physicochemical properties and their potential applications of these s-doped nanomaterials. This project aims at expanding the range of existing on-surface reactions, laying foundations for the synthesis of doped nanomaterials with atomic precision.