PMID- 35020360
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20220125
IS  - 1520-6882 (Electronic)
IS  - 0003-2700 (Linking)
VI  - 94
IP  - 3
DP  - 2022 Jan 25
TI  - Visualizing an Electrochemically Induced Radical Cation of Bipyridine at 
      Au(111)/Ionic Liquid Interfaces toward a Single-Molecule Switch.
PG  - 1823-1830
LID - 10.1021/acs.analchem.1c04707 [doi]
AB  - Room-temperature ionic liquids (RTILs) emerged as ideal solvents, and bipyridine 
      as one of the most used ligands have been widely employed in surface science, 
      catalysis, and molecular electronics. Herein, in situ shell-isolated 
      nanoparticle-enhanced Raman spectroscopy (SHINERS) and STM break junction 
      (STM-BJ) technique has been employed to probe the electrochemical process of 
      bipyridine at Au(111)/IL interfaces. It is interestingly found that these 
      molecules undertake a redox process with a pair of well-defined reversible peaks 
      in cyclic voltammograms (CVs). The spectroscopic evidence shows a radical cation 
      generated with rising new Raman peaks related to parallel CC stretching of a 
      positively charged pyridyl ring. Furthermore, these electrochemically charged 
      bipyridine is also confirmed by electrochemical STM-BJ at the single-molecule 
      level, which displays a binary conductance switch ratio of about 400% at the 
      redox potentials. This present work offers a molecular-level insight into the 
      pyridine-mediated reaction process and electron transport in RTILs.
FAU - Yu, Zhou
AU  - Yu Z
AD  - Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, 
      Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, 
      China.
FAU - Li, Jie-Qiong
AU  - Li JQ
AD  - Henan Engineering Center of New Energy Battery Materials, Henan D&A Engineering 
      Center of Advanced Battery Materials, College of Chemistry and Chemical 
      Engineering, Shangqiu Normal University, Shangqiu 476000, China.
FAU - Wang, Ya-Hao
AU  - Wang YH
AUID- ORCID: 0000-0001-5943-8646
AD  - Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, 
      Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, 
      China.
FAU - Su, Jun-Qing
AU  - Su JQ
AD  - Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, 
      Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, 
      China.
FAU - Fu, Jia-Ying
AU  - Fu JY
AD  - Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, 
      Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, 
      China.
FAU - Zou, Jia-Wei
AU  - Zou JW
AD  - Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, 
      Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, 
      China.
FAU - Zheng, Ju-Fang
AU  - Zheng JF
AD  - Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, 
      Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, 
      China.
FAU - Shao, Yong
AU  - Shao Y
AUID- ORCID: 0000-0003-0834-6244
AD  - Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, 
      Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, 
      China.
FAU - Zhou, Xiao-Shun
AU  - Zhou XS
AUID- ORCID: 0000-0003-1673-8125
AD  - Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, 
      Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, 
      China.
LA  - eng
PT  - Journal Article
DEP - 20220112
PL  - United States
TA  - Anal Chem
JT  - Analytical chemistry
JID - 0370536
SB  - IM
EDAT- 2022/01/13 06:00
MHDA- 2022/01/13 06:01
CRDT- 2022/01/12 17:15
PHST- 2022/01/13 06:00 [pubmed]
PHST- 2022/01/13 06:01 [medline]
PHST- 2022/01/12 17:15 [entrez]
AID - 10.1021/acs.analchem.1c04707 [doi]
PST - ppublish
SO  - Anal Chem. 2022 Jan 25;94(3):1823-1830. doi: 10.1021/acs.analchem.1c04707. Epub 
      2022 Jan 12.