Synthesis and Properties of Higher‐Order Tetrathiafulvalene Oligomers up to the Dodecamer.
Synthesis and Properties of Higher‐Order Tetrathiafulvalene Oligomers up to the Dodecamer.
复制标题
高阶四硫富瓦烯低聚物直至十二聚体的合成和性能。
DOI：
10.1002/chin.200205125
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
T. Otsubo
中科院分区：
文献类型：
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作者：
Tadashi Kageyama;S. Ueno;K. Takimiya;Y. Aso;T. Otsubo
合成了一系列TTF低聚物，包括单体（1）、二聚体（2）、三聚体（3）、四聚体（4）、六聚体（5）、八聚体（6）、十聚体（7）和十二聚体（8）。通过MS和NMR对其结构进行了表征。GPC测量表明，它们具有扩展的结构，随着TTF单元数目的增加，但由于E/Z构象而包含各种异构体混合物。循环伏安法研究表明，这些低聚物是高度多重的氧化还原体系，特别是最高的十二聚物表现出可逆的、结构较少的氧化还原波，涉及24个电子氧化步骤。十二聚体的旋涂膜分别由于TTF单元的中性、自由基阳离子和双阳离子状态而表现出黄色、淡黄色绿色和蓝色的电致变色。
A series of TTF oligomers, the monomer (1), the dimer (2), the trimer (3), the tetramer (4), the hexamer (5), the octamer (6), the decamer (7), and the dodecamer (8) has been synthesized as novel electrooptical materials. Their structures were well characterized by MS and NMR spectroscopy. GPC measurements indicated that they have extended structures, with the increasing number of TTF units, but comprised various isomeric mixtures due to theE/Zconformations. A cyclic voltammetric study revealed that these oligomers are highly multiple redox systems, and, in particular, the highest dodecamer demonstrates a reversible, less‐structured redox wave involving twenty‐four electron oxidation steps. The spin‐coated film of the dodecamer exhibits electrochromism of yellow, yellowish green, and blue colors, due to the neutral, radical cationic, and dicationic states of the TTF units, respectively.