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Multicenter-Bond-Based Quantum Interference in Charge Transport Through Single-Molecule Carborane Junctions.

Chun Tang1, Lijue Chen1, Longyi Zhang1

  • 1State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM), Xiamen University, Xiamen, 361005, China.

Angewandte Chemie (International Ed. in English)
|June 6, 2019
PubMed
Summary
This summary is machine-generated.

Quantum interference (QI) was observed in multicenter-bond systems for the first time, specifically in carborane junctions. This finding reveals suppressed conductance in carboranes, opening new avenues for molecular electronics.

Keywords:
carboranesconducting materialselectron transportmolecular electronicssingle-molecule studies

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Area of Science:

  • Molecular electronics
  • Quantum chemistry
  • Materials science

Background:

  • Quantum interference (QI) is crucial for charge transport in molecular electronic devices.
  • QI has primarily been studied in conventional π- and σ-bond systems.
  • Investigating QI in multicenter bonding systems offers novel insights.

Purpose of the Study:

  • To demonstrate the presence of QI in multicenter-bond systems.
  • To explore QI in carborane molecular junctions.
  • To understand the impact of QI on single-molecule conductance.

Main Methods:

  • Single-molecule conductance measurements.
  • Fabrication of carborane molecular junctions.
  • Analysis of charge transport through different carborane connectivities.

Main Results:

  • Quantum interference (QI) was confirmed in multicenter-bond systems (carboranes).
  • All three carborane connectivities exhibited destructive QI.
  • Carborane junctions showed significantly suppressed single-molecule conductance, especially in para- and meta-connected structures.

Conclusions:

  • This study demonstrates QI in multicenter-bond systems for the first time.
  • Carboranes present a novel platform for exploring QI in molecular electronics.
  • The findings pave the way for designing advanced molecular electronic devices utilizing multicenter bonds.