Conductive nanoscopic fibrous assemblies containing helical tetrathiafulvalene stacks.
Conductive nanoscopic fibrous assemblies containing helical tetrathiafulvalene stacks.
复制标题
DOI：
10.1002/asia.200900044
复制
发表时间：
2009-09
期刊：
影响因子：
--
通讯作者：
Yoko Tatewaki;T. Hatanaka;R. Tsunashima;Takayoshi Nakamura;M. Kimura;H. Shirai
中科院分区：
文献类型：
--
作者：
Yoko Tatewaki;T. Hatanaka;R. Tsunashima;Takayoshi Nakamura;M. Kimura;H. Shirai
在2，3，5，6-四氟-7，7 '，8，8'-四氰基对苯醌二甲烷（F（4）TCNQ）存在下，四硫富瓦烯（TTF）S-TTF和R-TTF自组装成螺旋纳米纤维。手性酰胺端基之间的分子间氢键和电荷转移复合物的形成导致长的一维超分子堆叠，并且端基的手性影响堆叠内TTF核的分子取向。通过点接触电流成像（PCI）AFM测量，由S-TTF和F（4）TCNQ制成的单螺旋纳米纤维的电导率被确定为（7.0+/-3.0 x10（-4）S cm（-1）。由螺旋纳米纤维组成的非织造织物显示出半导体温度依赖性，活化能为0.18 eV。
Tetrathiafulvalenes (TTF) S-TTF and R-TTF having four chiral amide end groups self-organize into helical nanofibers in the presence of 2,3,5,6-tetrafluoro-7,7',8,8'-tetracyano-p-quinodimethane (F(4)TCNQ). The intermolecular hydrogen bonding among chiral amide end groups and the formation of charge-transfer complexes results in a long one-dimensional supramolecular stacking, and the chirality of the end groups affects the molecular orientation of TTF cores within the stacks. Electronic conductivity of a single helical nanoscopic fiber made of S-TTF and F(4)TCNQ is determined to be (7.0+/-3.0)x10(-4) S cm(-1) by point-contact current-imaging (PCI) AFM measurement. Nonwoven fabric composed of helical nanofibers shows a semiconducting temperature dependence with an activation energy of 0.18 eV.