Observation of current rectification by the new bimetallic iron(iii) hydrophobe [Fe(LN4O6 )] on Au|LB-molecule|Au devices

Dalton Transactions : an International Journal of Inorganic Chemistry
A D K Isuri WeeraratneCláudio N Verani

Abstract

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(LN4O6)] (1). The new H6LN4O6 ligand displays bicompartmental topology capable of accomodating two five-coordinate HSFeIII ions bridged by tetraaminobenzene at a close distance of ca. 8 Å. 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(LN4O6)] (1) shows unquestionable molecular rectification and displays a rectification ratio RR between 2 and 15.

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Citations

Sep 25, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Cláudio N Verani
Oct 1, 2019·Chemistry : a European Journal·A D K Isuri WeeraratneCláudio N Verani
Sep 20, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Debashis BasuCláudio N Verani
Nov 19, 2020·Langmuir : the ACS Journal of Surfaces and Colloids·A D K Isuri WeeraratneCláudio N Verani

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Methods Mentioned

BETA
X-ray
Brewster angle microscopy
AFM

Software Mentioned

SQUEEZE
PLATON
SHELX
Gaussian
Matlab

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