Verification and Temperature-Dependent Rectification by HBQ, the Smallest Unimolecular Donor-Acceptor Rectifier

Yingmei Han, Li Jiang, Joseph E. Meany, Yulong Wang, Stephen A. Woski, Marcus S. Johnson, Christian A. Nijhuis, Robert M. Metzger*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

19 Downloads (Pure)

Abstract

Five years ago, rectification of electrical current was found in 4′-bromo-3,4-dicyano-2′,5′-dimethoxy-[1,1′-biphenyl]-2,5-dione (1), a hemibiquinone (which we will call either 1 or HBQ) that has a very small working length (1.1 nm). Monolayers of HBQ on AuTS were detected by "nanodozing"atomic force microscopy (AFM) and were contacted with two types of top electrodes: either cold Au or eutectic Ga-In. Here, we describe cyclic voltammetry of a self-assembled monolayer (SAM) of HBQ and its orientation on a gold substrate with angle-resolved X-ray photoelectron spectroscopy. New measurements of its rectification as a monolayer as a function of bias range and temperature confirm and prove that HBQ is truly the smallest donor-acceptor rectifier and provide some insight into the mechanism of rectification.

Original languageEnglish
Pages (from-to)28790-28796
Number of pages7
JournalACS Omega
Volume7
Issue number33
DOIs
Publication statusPublished - 23 Aug 2022

Fingerprint

Dive into the research topics of 'Verification and Temperature-Dependent Rectification by HBQ, the Smallest Unimolecular Donor-Acceptor Rectifier'. Together they form a unique fingerprint.

Cite this