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    Observation of current rectification by the new bimetallic iron(iii) hydrophobe [FeIII2(L-N4O6)] on Au|LB-molecule|Au devices

    Year: 2018

    Journal: Dalton Trans., Volume 47, OCT 28, page 14352–14361

    Authors: Weeraratne, A. D. K. Isuri; Baydoun, Habib; Shakya, Rajendra; Niklas, Jens; Xie, Lingxiao; Mao, Guangzhao; Stoian, Sebastian A.; Poluektov, Oleg G.; Verani, Claudio N.

    Organizations: National Science Foundation [NSF-CHE1012413, NSF-CHE-1500201]; U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]; University of Idaho; WSU-Department of Chemistry

    Targeting the development of stimulus-responsive molecular materials with electronic functionality, we have synthesized and studied the redox and electronic properties of a new bimetallic iron hydrophobe [FeIII2(L-N4O6)] (1). The new H6LN4O6 ligand displays bicompartmental topology capable of accomodating two five-coordinate Fe-HS(III) ions bridged by tetraaminobenzene at a close distance of ca. 8 angstrom. We show that the metal-based reduction processes in (1) proceed sequentially, as observed for electronically coupled metal centers. This species forms a well-defined Pockels-Langmuir film at the air-water interface, with collapse pressure of 32 mN m(-1). Langmuir-Blodgett monolayers were deposited on gold substrates and used to investigate current-voltage (I-V) measurements. This unprecedented bimetallic hydrophobe [FeIII2(L-N4O6)] (1) shows unquestionable molecular rectification and displays a rectification ratio RR between 2 and 15.
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