利用STM探討Ru(bpy)2(phen-dione)2+與亞硼酸的電化學環合反應

• Main Authors: Tang, Wan-Yu, 唐婉瑜
• Other Authors: Wang, Chong-Mou
• Format: Others
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/m6mxwp

碩士 === 國立臺灣師範大學 === 化學系 === 106 === A series of ruthenium complexes of 1,10-phenanthroline-5,6-dione (denoted phen-dione) and 2,2’-bipyridine (denoted bpy) were synthesized and subjected to STM studies for their reactions with 3-aminophenylboronic acid (APBA) on carbon surfaces. Experimental results showed that when Ru(bpy)x(phen-dione)3-x2+ (x: 2, 3) complexes were brought into contact with APBA that was pre-covalently grafted to highly ordered pyrolytic graphite (HOPG) electrodes through chemical diazotization and electrochemical denitrogenation processes, the ruthenium complexes could be immobilized and therefore formed nanoscale films on the electrodes as the electrodes were biased with negative voltages. The thickness of the ruthenium layers was determined to be around 13 Å. According to the molecular size of the ruthenium complexes (~13.7 Å), we hypothesized that the ruthenium complexes formed monolayer deposition on the APBA-modified electrodes. We also monitored the reactions on multiwalled carbon nanotubes (MWCNT) by depositing APBA and ruthenium complexes on the tubes through chemical reduction processes. The resulting tubes (denoted Ru@CNT) showed photomagnetic signals, rendering them able to migrate oppositely towards external magnets as floating on water under the illumination of a 473-nm laser. These results showed that the synthesized carbon nanotubes could be useful in photomagnetic applications at ambient conditions.