Langmuir−Blodgett Layers from Schiff Base Copper(II) Complexes

Abstract

Metal complexes of salicylideneamines exhibit very interesting properties and have been well characterized since the late 1920s. Amphiphilic salicylideneamines have been synthesized in order to introduce such complexes in Langmuir−Blodgett multilayers. They do not hydrolyze under the applied experimental conditions and form stable monolayers. On subphases containing transition metal ions, these compounds form square-planar metal complexes by an interfacial reaction. Monolayers of these complexes have been transferred onto solid substrates to prepare Langmuir−Blodgett multilayers. Spectroscopic measurements with polarized light indicate an orientation of the complex plane nearly parallel to the substrate surface. In addition, monolayer experiments with presynthesized amphiphilic metal complexes have been carried out. Available hydroxyl groups in such complexes may be exploited to construct aggregates due to the ability of the molecules to form intermolecular bonds. Monolayers of these aggregates have also been used for the preparation of multilayers.

New dimeric and supramolecular organotin(IV) complexes with a tridentate schiff base as potential biocidal agents

“…Schiff base ligands received instant and enduring popularity not only they have played a seminal role in the development of modern coordination chemistry [1], but they can also be found at key points in the development of inorganic chemistry [2], catalysis [3,4] medicinal imaging [5], optical materials [6], and thin films [7,8]. The chemistry of organotin(IV) has been the area of interest for many years because of their industrial and biomedical applications [9].…”

Synthesis and structural characterization of a novel tetranuclear Cu(II) complex: [Cu4L2(pic)4(H2O)2]·2H2O

“…Transition metal complexes having an N,N¢-disalicylideneethylenediamine (Salen) ligand or its analogues are extensively investigated, because not only have these series of complexes played a seminal role in the development of modern coordination chemistry [1], but they can also be found at key points in the development of catalysis [2], medical imaging [3], interesting magnetic properties [4,5] nonlinear optical materials [6,7], thin films [8] and excellent biological activity, such as anticancer and anticoagulant activity [9]. Although most of them are stable in solution and in solid state, C=N bonds often suffer exchange reaction as well as hydrolysis.…”

Substitution controlled molecular orientation and nanostructure in the Langmuir–Blodgett films of a series of amphiphilic naphthylidene-containing Schiff base derivatives

“…LB films of amphiphilic Schiff base compounds, especially for those Schiff bases from salicylaldehyde, have been investigated and their interesting features were revealed [27][28][29]. The main properties focused on the coordination with transition metal ions, and some organized molecular films of these Schiff base derivatives have been reported.…”

“…The main properties focused on the coordination with transition metal ions, and some organized molecular films of these Schiff base derivatives have been reported. For example, Nagel et al have investigated the copper complex of Schiff base compounds [29]. Liang and co-workers have investigated the organization of Schiff base amphiphiles by spectral characterization [30,31].…”