Syntheses, structure, and electron-transport properties of redox-active ferrocenyl-ethynyl molecules

• Main Authors: Chiao-pei Chen, 陳巧珮
• Other Authors: Teng-Yuan Dong
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/76069767924094617613

博士 === 國立中山大學 === 化學系研究所 === 98 === Structural determinations and electrochemical properties in the series of multinuclear ferrocenyl–ethynyl complexes with formula [(η5-C5H5)(P2)MII-C≡C-(fc)n-C≡C-MII(P2)(η5-C5H5)] (fc = ferrocenyl; M = Fe(II), Os(II); P2 = Ph2PCH2CH2PPh2 (dppe)) are reported. These complexes undergo sequential reversible oxidation events from 0.0 to 1.0 V referred to the Ag/AgCl electrode in anhydrous CH2Cl2 solution and the low-potential waves have been assigned to the two end-capped metallic centers. The magnitude of the electronic coupling between the two terminal metallic centers in the series of complexes was estimated by the electrochemical technique. Based on the correlation between the △E1/2 values and the second redox potentials of the end-capping metallic centers in the series of complexes, a qualitative explanation for the difference of the electronic coupling is given. Furthermore, we attempt to fabricate the SAMs of ferrocenyl-ethynyl molecules on gold surface and confirmed by XPS spectrum and the RAIR spectrum. CV and CA electrochemistry technique was employed in studied electron transfer rate (k).