Co^II and Cu^II Fluorescent Complexes with Acridine‐Based Ligands

Abstract

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).

High-fidelity detection of picric acid following proton prompted fluorescence quenching by a novel acridine yellow G-based binuclear ZnII-metallacycle

“…2,7-dimethylacridine-3,6-diyl-bis-azaneylylidene-bis-(methaneylyl-idene)-diphenol (H 2 L M ), which was synthesized with slight modifications following a literature procedure. 40 Yield, 67%. FT-IR (KBr pellets, cm À1 ): 3435 (w, n str , O-H phenolic ), 2925 (m, n str , C-H aliphatic ), 1603 (s, n str , -CHQN-).…”

Cathecol and Naphtol Groups in Salphen-Type Schiff Bases for the Preparation of Polynuclear Complexes

“…In recent years, our groups have reported several such symmetric and asymmetric Schiff base ligands and their complexes with interesting photophysical and magnetic properties. The interesting results obtained for those complexes inspired us to continue research on the synthesized and dynamic properties of new metal compounds by using various chelating ligands [6][7][8]21]. In continuation of our earlier studies on Schiff base compounds, in this paper, we exploit the two strategies described above to prepare polynuclear complexes with SYML1 and SYML2.…”

“…Therefore, these compounds have excellent potential as building blocks in material science among other applications. The choice of a suitable combination of aldehyde and diamine can give rise to extremely luminescent ligands that, combined with paramagnetic metals, can provide multifunctional complexes [7,8]. Asymmetric ligands have special structural and photophysical properties.…”

“…Self-assembly of complicated polynuclear complexes can be achieved in many ways such as using Schiff base ligands that can bridge more than one metal. In this way, the structure of the complex obtained is not easily controlled [7,8,15,[24][25][26][27][28]. We propose two strategies to obtain polynuclear complexes in a controlled manner using N 2 O 2 Schiff bases (salen or salphen type ligands).…”

Luminescent and Magnetic Tb-MOF Flakes Deposited on Silicon

“…Another interesting possibility concerns the development of multifunctional complexes that incorporate multiple properties such as magnetism and luminescence [21][22][23][24][25][26][27][28] or photochromism [29,30].…”