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Two mononuclear iron(III) complexes, [Fe(L1)(N3)] and [Fe(L2)(N3)], {H2L1 = N,N′-bis(3-methoxysalicylidene)diethylenetriamine and H2L2 = N,N′-bis(3-ethoxysalicylidene)diethylenetriamine} have been synthesized and characterized by elemental, spectral and X-ray crystallographic studies. Structural features have been examined in detail that reveal the formation of interesting supramolecular networks generated through weak non-covalent interactions. The current–voltage characteristic curves for an Al/complex Schottky-barrier diode (SBD) exhibit non-ohmic behavior. Important parameters like ideality factor, barrier height and series resistance are measured with the help of thermionic emission (TE) theory. Space-charge-limited current (SCLC) theory is employed to evaluate the charge transport parameters such as effective carrier mobility and transit time for both complexes. Complex 1 is found to be more …