| Summary: | 碩士 === 國立臺灣師範大學 === 化學系 === 102 === This thesis focuses on two experiments: one is the study of stepwise assembly of tris-(8-hydroxyquinoline)aluminum (AlQ3) on indium-doped tin oxide (ITO) with STM techniques, and the other, on bis-(2,2’-bypyridyl) 5-aminophenanthroline ruthenate(II) (Ru(bpy)2(NH2-phen)2+) regarding its photochemical properties such as photo-induced magnetic conversion and current rectification with magnetic-mode and conducting-mode microscopic techniques (MFM and CFM). Experimental results show that as 4-aminoanline is modified on ITO via diazotization-cathodic reduction processes, the adsorbate can form diazo linkage with 8-hydroxyquinoline. The resulting adsorbate can thus form complex with aluminum ion in the presence of two excess 8-hydroxyquinoline molecules. Besides, we find that Ru(bpy)2(NH2-phen)2+ can be modified on multiwall carbon nanotube (CNT) via diazotization reaction. The resulting carbon nanotube (Ru@CNT), as excited by blue light (ex: 473 nm ), changes greatly in phase shift, more significantly than exposed to green light. The amplitude of the phase shift is a function of the electric bias (Vb) applied to the host substrate (ITO), increasing with an increase in Vb. These results suggest that the spin of Ru(bpy)2(NH2-phen)2+ might change from singlet to triplet as being photoexcited. Ru@CNT can also conduct electric current to flow between two separated ITO (gated by a 1 m-wide groove) as exposed to blue light, showing application potential in photochemical current rectification.
Keywords: Tris-(8-hydroquinoline)aluminum、ruthenium bis(2,2'-bipyridine)-5-aminophenanthroline.
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