Multifunctional molecules, that respond both to magnetic fields and light are object of study due to possible applications in fields as diverse as imaging or information processing and storage. In this paper we report visible and NIR emitting single-molecule magnets (SMMs) of Yb(III) and Er(III) with symmetric (SYML) and asymmetric (AZOL) Schiff base ligands.The complexes prepared SYML-Ln2, AZOL-Ln3 (Ln = Er, Yb) are SMMs, with the exception of AZOL-Yb3, with a relaxation behavior dominated by quantum tunneling of the magnetization. The multi-level double-decker structure of the complexes is ideal for surface deposition in carbon-based materials.

A new effectual naphthalene-based azomethine receptor has been systematically designed and synthesized as a selective colorimetric and fluorescent chemosensor for dual channel detection of cations and anions in aqueous environments.

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In this paper we report the synthesis of an asymmetric Schiff base ligand derived from hydrazine and its Cu(II) trinuclear coordination complex, [Cu3(HYDRAV)2Cl2] (HYDRAV-Cu). The ligand HYDRAVH2 and the Cu(II) complex HYDRAV-Cu have been crystallographically characterized. HYDRAVH2 contains a fluorescent naphtyl group and emission properties of both HYDRAVH2 and HYDRAV-Cu are reported. The magnetic properties of HYDRAV-Cu have been investigated. Hydrazine is an excellent precursor for asymmetric Schiff base ligands that afford antiferromagnetic coupling as shown here for HYDRAV-Cu.

The condensation reaction of salicylaldehyde or 2‐hydroxynaphthaldehyde with a diamino organic group (Acridine Yellow or diaminoacridine) resulted in the Schiff‐base ligands ACRI‐1, ACRI‐2 and ACRI‐3, with the last two hitherto unknown. Fluorescent ACRI‐1, ACRI‐2 and ACRI‐3 were designed to provide iminophenolic binding pockets for two transition metals and ferromagnetic exchange between the metals. Following our report on the complex [Co2(ACRI‐1)2] (1Co), we report herein the reactions of ACRI‐1, ACRI‐2 and ACRI‐3 with CoII and CuII salts, which afforded the new fluorescent complexes [Cu2(ACRI‐1)2] (1Cu), [Co2(ACRI‐2)2] (2Co), [Cu2(ACRI‐2)2] (2Cu), [Co2(ACRI‐3)2(H2O)4] (3Co) and [Cu2(ACRI‐3)2] (3Cu).