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Radical‐Enhanced Charge Transport in Single‐Molecule Phenothiazine Electrical Junctions
Author(s) -
Liu Junyang,
Zhao Xiaotao,
AlGaliby Qusiy,
Huang Xiaoyan,
Zheng Jueting,
Li Ruihao,
Huang Cancan,
Yang Yang,
Shi Jia,
Manrique David Zsolt,
Lambert Colin J.,
Bryce Martin R.,
Hong Wenjing
Publication year - 2017
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201707710
Subject(s) - phenothiazine , conductance , molecule , homo/lumo , molecular electronics , spintronics , materials science , break junction , electron transport chain , chemical physics , chemistry , nanotechnology , condensed matter physics , physics , organic chemistry , medicine , biochemistry , ferromagnetism , pharmacology
We studied the single‐molecule conductance through an acid oxidant triggered phenothiazine (PTZ‐) based radical junction using the mechanically controllable break junction technique. The electrical conductance of the radical state was enhanced by up to 200 times compared to the neutral state, with high stability lasting for at least two months and high junction formation probability at room‐temperature. Theoretical studies revealed that the conductance increase is due to a significant decrease of the HOMO–LUMO gap and also the enhanced transmission close to the HOMO orbital when the radical forms. The large conductance enhancement induced by the formation of the stable PTZ radical molecule will lead to promising applications in single‐molecule electronics and spintronics.