Single molecule conductance of porphyrin wires with ultralow attenuation
Single molecule conductance of porphyrin wires with ultralow attenuation
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DOI：
10.1021/ja802281c
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发表时间：
2008-07-09
影响因子：
15
通讯作者：
Nichols, Richard J.
中科院分区：
文献类型：
--
作者：
Sedghi, Gita;Sawada, Katsutoshi;Nichols, Richard J.
已经合成了一系列具有一到三个卟啉重复单元的、以硫代乙酸酯封端且由丁二炔连接的卟啉低聚物。使用l(s)和l(t)方法进行单分子电扫描隧道显微镜测量，以确定这一系列低聚物的分子电导。分子电导随硫 - 硫距离呈指数下降，衰减因子β极低，为(0.04 ± 0.006) 埃⁻¹。
A series of thioacetate-terminated butadiyne-linked porphyrin oligomers have been synthesized with one to three porphyrin repeat units. Single molecule electrical scanning tunneling microscopy measurements using the l(s) and l(t) methods were used to determine the molecule conductances for this series of oligomers. The molecular conductance shows an exponential falloff with sulfur-sulfur distance with a remarkably low attenuation factor of beta = (0.04 +/- 0.006) angstrom(-1).