Citation: Saisai Yuan, Yiming Chen, Xijuan Wang, Degui Zhao, Tengyang Gao, Caiyun Wei, Chuanxiang Chen, Yang Yang, Wenjing Hong. Decouple the intermolecular interaction by encapsulating an insulating sheath[J]. Chinese Chemical Letters, ;2025, 36(6): 110816. doi: 10.1016/j.cclet.2025.110816 shu

Decouple the intermolecular interaction by encapsulating an insulating sheath

Saisai Yuan ^{a, b} ,
Yiming Chen ^a ,
Xijuan Wang ^a ,
Degui Zhao ^c ,
Tengyang Gao ^{c, d, *,} ,
Caiyun Wei ^e ,
Chuanxiang Chen ^a ,
Yang Yang ^{e, *,} ,
Wenjing Hong ^{e, *,}

a.
School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212100, China
b.
National & Local Joint Engineering Research Center for Mineral Salt Deep Utilization, Huaiyin Institute of Technology, Huaian 223003, China
c.
Key Laboratory of Organic Compound Pollution Control Engineering (MOE), School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China
d.
College of Chemical Engineering & College of Materials Science and Engineering, Fuzhou University, Fuzhou 350108, China
e.
State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering & Pen-Tung Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361005, China

tygao@shu.edu.cn

yangyang@xmu.edu.cn

whong@xmu.edu.cn

Received Date: 26 August 2024
Revised Date: 26 December 2024
Accepted Date: 2 January 2025
Available Online: 2 January 2025

Figures(4)

Single-molecule junctions are building blocks for constructing molecular devices. However, intermolecular interactions like winding bring additional interference among the surrounding molecules, which inhibits the intrinsic coherent transport through single-molecule junctions. Here, we employed a nanocavity (dimethoxypillar[5]arene, DMP[5]), which is analogous to electric cables, to confine the conformation of flexible chains (1,8-diaminooctane, DAO) via host-guest interaction. Single-molecule conductance measurements indicate that the conductance of DAO encapsulated with DMP[5] is as high as that of pure DAO, as reproduced by theoretical simulations. Intriguingly, the molecular lengths of the DAO encapsulated with DMP[5] increase from 1.13 nm to 1.46 nm compared with the pure DAO, indicating that DMP[5] keeps DAO upright-standing via the confinement effect. This work provides a new strategy to decouple the intermolecular interaction by employing an insulating sheath, enabling the high-density integration of single-molecule devices.
- Single-molecule,
- Molecule devices,
- Host-guest interaction,
- Confinement effect,
- Decouple
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