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研究开发单堆积三苯基结的电场诱导组装技术
作者:小柯机器人 发布时间:2020/11/5 16:19:16

厦门大学的洪文晶团队开发出了一种单堆积三苯基结的电场诱导组装技术。相关论文于2020年11月2日发表在《美国化学会志》。

分子组装是功能分子材料和器件的关键。在能够形成组装体的分子相互作用中,π-共轭分子主链间的堆积对电荷通过有机材料和器件的传输起着至关重要的作用。单分子结技术允许在纳米结上施加大约108v/m的电场,并在单堆积层水平上研究电场诱导组装。

在该工作中,研究团队用扫描隧道显微镜断裂结(STM-BJ)技术揭示了两个分子之间的电场诱导堆积效应,并且发现随着电场强度的增加堆积概率增加。结合密度泛函理论(DFT)的计算结果表明,在电场作用下,分子变得更为平坦,从而导致优先堆积。

该研究提供了一种利用强电场调节分子组装的新技术。

附:英文原文

Title: Electric Field-Induced Assembly in Single-Stacking Terphenyl Junctions

Author: Yongxiang Tang, Yu Zhou, Dahai Zhou, Yaorong Chen, Zongyuan Xiao, Jia Shi, Junyang Liu, Wenjing Hong

Issue&Volume: November 2, 2020

Abstract: Molecular assembly is crucial in functional molecular materials and devices. Among the molecular interactions that can form assemblies, stacking among π-conjugated molecular backbones plays an essential role in charge transport through organic materials and devices. The single-molecule junction technique allows for the application of an electric field of approximately 108 V/m to the nanoscale junctions and to investigate the electric field-induced assembly at the single-stacking level. Here, we demonstrate an electric field-induced stacking effect between two molecules using the scanning tunneling microscope break junction (STM-BJ) technique and we found an increase in the stacking probability with increasing intensity of the electric field. The combined density functional theory (DFT) calculations suggest that the molecules become more planar under the electric field, leading to the energetically preferred stacking configuration. Our study provides a new strategy for tuning molecular assembly by employing a strong electric field.

DOI: 10.1021/jacs.0c07348

Source: https://pubs.acs.org/doi/10.1021/jacs.0c07348

 

期刊信息

JACS:《美国化学会志》,创刊于1879年。隶属于美国化学会,最新IF:14.612
官方网址:https://pubs.acs.org/journal/jacsat
投稿链接:https://acsparagonplus.acs.org/psweb/loginForm?code=1000