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Published on: October 10, 2016
Ladderization of polycyclic aromatic hydrocarbons enhances electrical conductivity through additional coherent
Qing Wang1, Na Huang1,2,3, Ruiying Zhang1
1Key Laboratory of Molecule Synthesis and Function Discovery, Fujian Province University, College of Chemistry at Fuzhou University, Fuzhou, Fujian, 350108, China.
None:
Achieving high-conductance molecular devices on a large scale is a fundamental challenge. While extending π-conjugation is a facile approach, significant conductance enhancement remains difficult. We demonstrate that ladder-type polycyclic aromatic hydrocarbons synthesized via a Scholl reaction provide high conductance, as the ladder molecule 2TP exhibits a conductance (10-3.74G0) that is 1.36 orders of magnitude higher than that of its non-ladder analogue. Theoretical calculations attribute this enhancement not only to the reduced HOMO-LUMO gap but predominantly to the increased coherent electron transport channels. This work establishes ladderization as a powerful strategy for constructing high-conductance molecular devices.
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