Enhancing one-dimensional charge transport through intermolecular π-electron delocalization:: Conductivity improvement for organic nanobelts
Enhancing one-dimensional charge transport through intermolecular π-electron delocalization:: Conductivity improvement for organic nanobelts
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DOI：
10.1021/ja070164g
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发表时间：
2007-05-23
影响因子：
15
通讯作者：
Zang, Ling
中科院分区：
文献类型：
--
作者：
Che, Yanke;Datar, Aniket;Zang, Ling
在PTCDI纳米带内有效的π电子离域，其中一维分子排列由共面π-π堆积主导，已经通过电子自旋共振（ESR）光谱和电流-电压（I-V）测量表征。长程π电子离域使得能够通过外部电荷掺杂显著增强纳米带的电导率。当浸渍在饱和肼蒸气中时，PTCDI纳米带的电导率实现了约3个数量级的增加，这意味着该纳米材料在还原性气体物种如有机胺的电传感中的潜在应用。
Effective pi-electron delocalization within a PTCDI nanobelt, for which the one-dimensional molecular arrangement is dominated by the cofacial pi-pi stacking, has been characterized by both electron spin resonance (ESR) spectrometry and current-voltage (I-V) measurement. The long-range pi-electron delocalization enables dramatic enhancement of electrical conductivity of the nanobelt through external-charge doping. When immersed in saturated hydrazine vapor, about 3 orders of magnitude increase in conductivity was achieved for the PTCDI nanobelt, implying potential application of the nanomaterials in electrical sensing of reducing gaseous species such as organic amines.