Iron(II) Mediated Supramolecular Architectures with Schiff Bases and Their Spin-Crossover Properties

Abstract

Supramolecular architectures, which are formed through the combination of inorganic metal cations and organic ligands by self-assembly, are one of the techniques in modern chemical science. This kind of multi-nuclear system in various dimensionalities can be implemented in various applications such as sensing, storage/cargo, display and molecular switching. Iron(II) mediated spin-crossover (SCO) supramolecular architectures with Schiff bases have attracted the attention of many investigators due to their structural novelty as well as their potential application possibilities. In this paper, we review a number of supramolecular SCO architectures of iron(II) with Schiff base ligands exhibiting varying geometrical possibilities. The structural and SCO behavior of these complexes are also discussed in detail.

Mononuclear Fe(III) Schiff Base Complex with Trans-FeO4N2 Chromophore of o-Aminophenol Origin: Synthesis, Characterisation, Crystal Structure, and Spin State Investigation

“…As part of our ongoing interest in SCO Schiff base iron complexes and their spin states [15][16][17][18][19], we report here our investigations on the structure and spin state of an iron(III) complex with the doubly deprotonated form of the proligand 2-{(E)-[2-hydroxyphenyl)imino]methyl}phenol (H 2 L) (Scheme 1). The ligand L 2− coordinates in a tridentate chelating mode through the two deprotonated phenolate oxygens and the azomethine nitrogen.…”