Switching-on luminescence in anilate-based molecular materials

Matteo Atzori, Flavia Artizzu, Luciano Marchiò, Danilo Loche, Andrea Caneschi, Angela Serpe, Paola Deplano, Narcis Avarvari, Maria Laura Mercuri

Risultato della ricerca: Contributo su rivistaArticolo in rivistapeer review

Abstract

A simple change of one chloro substituent on the chloranilate ligand with a cyano group dramatically affects the electronic properties of the anilate moiety inducing unprecedented luminescence properties in the class of anilate-based ligands and their metal complexes. Here we report on the optimized synthesis and full characterization, including photoluminescence, of the chlorocyananilate ligand (ClCNAn2-) (dianion of the 3-chloro-6-cyano-2,5-dihydroxybenzoquinone, H2ClCNC6O4), a unique example of a heterosubstituted anilate ligand whose electronic properties, optical properties and coordination chemistry have never been investigated to date, even though it has been known since 1966. The synthesis and full characterization of its tris-chelated metal complexes with Cr(iii), Fe(iii), and Al(iii) metal ions are also described herein. These complexes, formulated as [A]3[MIII(ClCNAn)3] (A = (n-Bu)4N+ or Ph4P+; MIII = Cr (3), Fe (4), Al (5)), are isostructural. While 3 and 4 are potential molecular building blocks for the preparation of molecule-based magnets or paramagnetic conducting organic-inorganic hybrid systems, 5, instead, where the coordinated Al(iii) metal ions retain the luminescence of the ligand, represents a unique building block to achieve heterobimetallic assemblies showing emissive properties under visible light irradiation.

Lingua originaleInglese
pagine (da-a)15786-15802
Numero di pagine17
RivistaDalton Transactions
Volume44
Numero di pubblicazione36
DOI
Stato di pubblicazionePubblicato - 3 lug 2015
Pubblicato esternamente

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