Johannes Gutenberg-University of Mainz, Duesbergweg 10-14, 55128, Mainz, Germany.
Dalton Trans. 2011 Apr 14;40(14):3558-75. doi: 10.1039/c0dt01528h. Epub 2011 Mar 3.
Oligoferrocenes Fmoc-Fca(n)-OMe (n=3-5) are assembled in a stepwise precise manner from Fmoc-protected ferrocene amino acid Fmoc-Fca-OH (H-Fca-OH = 1-amino-1'-ferrocene carboxylic acid; Fmoc = 9-fluorenylmethyloxycarbonyl) via amide bonds on solid supports by sequential Fmoc deprotection, acid activation and coupling steps. The resulting well-defined oligomers form ordered zigzag structures in THF solution with characteristic hydrogen bonding patterns. Electrochemical experiments reveal sequential oxidations of the individual ferrocene units in these peptides giving mixed-valent cations. Optical intervalence electron transfer is detected by intervalence transitions in the near-IR.
寡聚二茂铁 Fmoc-Fca(n)-OME(n=3-5) 通过酰胺键在固体载体上逐步精确组装，从 Fmoc 保护的二茂铁氨基酸 Fmoc-Fca-OH（H-Fca-OH=1-氨基-1'-二茂铁羧酸；Fmoc=9-芴甲氧羰基）中合成。所得的高度明确的低聚物在 THF 溶液中形成具有特征氢键模式的有序之字形结构。电化学实验表明，这些肽中的各个二茂铁单元的顺序氧化生成混合价阳离子。通过近红外的价间电子转移来检测光学的价间电子转移。
