Electrical conduction through linear porphyrin arrays

被引：75

作者：

Yoon, DH

Lee, SB

Yoo, KH ^{[1
]}

Kim, J

Lim, JK

Aratani, N

Tsuda, A

Osuka, A

Kim, D

机构：

[1] Yonsei Univ, Dept Phys, Seoul 120742, South Korea

[2] Korea Res Inst Stand & Sci, Elect Device Grp, Taejon 305600, South Korea

[3] Seoul Natl Univ, Sch Chem, Seoul 151742, South Korea

[4] Yonsei Univ, Dept Chem, Seoul 120749, South Korea

[5] Yonsei Univ, Ctr Ultrafast Opt Characterist Control, Seoul 120749, South Korea

[6] Kyoto Univ, Dept Chem, Kyoto 6068502, Japan

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2003年 / 125卷 / 36期

关键词：

D O I：

10.1021/ja0346429

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Electrical conduction measurements were made on two extreme types of directly linked porphyrin arrays by using nanoelectrodes. One type is the directly linked Zn(II)porphyrin arrays, consisting of 48 Zn(II)porphyrin moieties (Z48), and the other type is the completely flat, tape-shaped Zn(II)porphyrin arrays, consisting of eight Zn(II)porphyrin units (T8). The I-V curve for Z48 exhibits the diode-like behavior and the hysteresis depending on the voltage sweep direction presumably due to the conformational heterogeneity arising from the dihedral angle distribution in Z48. On the other hand, the I-V curve for T8 is nearly symmetric without any hysteresis, leading to the higher conductivity and the smaller band gap. These results illustrate that the stronger pi-electron conjugation in T8, as compared with that of Z48, results in better electrical conduction.

引用

页码：11062 / 11064

页数：3

共 31 条

[1] Building molecular wires from the colours of life: conjugated porphyrin oligomers [J].