Selective Capture of Ni²⁺ Ions by Naphthalene‐ and Coumarin‐Substituted Dithiolenes

Abstract

Naphthalene-and coumarin-substituted dithiolene ligands were synthesized, and their coordination behavior towards different metal ions, including biologically relevant ions like Cu + , Cu 2+, and Fe 3+ , was tested. Both ligands bind nickel selectively and show no evidence of binding any other metal investigated. Particularly, the compound bearing the fluorophore coumarin can serve as a colorimetric ("naked eye") and on-off fluorometric marker for the detection of Ni 2+ ions with a characteristic near-infrared (NIR) signature even in the presence of various transition-metal ions, which are normally difficult to

Photoconducting Devices with Response in the Visible–Near-Infrared Region Based on Neutral Ni Complexes of Aryl-1,2-dithiolene Ligands

“…While the oxidation processes involving the 1 -/1 and 2 -/2 couples and the reductions for the 1 -/1 2couple were found to be reversible (i pc /i pa ~ 1.0), reductions for the 2 -/2 2couple were found to be only quasi-reversible (i pc /i pa = 0.7). It should be noted that these findings differ from those previously obtained in acetonitrile for (TBA + )(1 -) 45 and (PPh 4 + )(2 -), 47 where an irreversible nature was found for both the reduction and oxidation process. The oxidation processes leading from 1and 2to 1 and 2 were investigated by spectrophotometric titration of (TBA + )(1 -) and (TBA + )(2 -) with diiodine in CH 2 Cl 2 solution (Figure 3).…”

“…44,46 Naphthalene-and coumarin-substituted dithiolene ligands were exploited as selective markers of the Ni 2+ ion. 47 Following our previous studies on d 8 metal complexes bearing Ar-edt 2− ligands showing potential-controlled spectroscopic and second-order NLO properties, 48,49…”

“…44,46 Naphthalene-and coumarin-substituted dithiolene ligands were exploited as selective markers of the Ni 2+ ion. 47 Following our previous studies on d 8 metal complexes bearing Ar-edt 2-ligands showing potential-controlled spectroscopic and second-order NLO properties, 48,49 and pursuing our interest in photoconducting bis(1,2-dithiolene) complexes, we describe here the synthesis, characterization, and the development of a novel photodetector with response in the Visible-NIR…”

Crystal structure of 1-ethyl-3-(2-oxo-1,3-dithiol-4-yl)quinoxalin-2(1H)-one

“…There are only two crystal sructures of very closely related systems reported in the literature. In one (A), the quinoxalin substituent of the present molecule is replaced by a coumarine (Ghosh et al, 2016). In the other (B), the ene-dithiocarbonate is replaced by an aminothiazole (Mamedov et al, 2005).…”

A Mixed-Valence Tetra-Nuclear Nickel Dithiolene Complex: Synthesis, Crystal Structure, and the Lability of Its Nickel Sulfur Bonds

“…Homoleptic bis-dithiolene complexes, in particular those of group 10 and group 11 metals, [M(dithiolene) 2 ] n− (n = 0-2), most often exhibit a square planar geometry, which is occasionally slightly distorted [38][39][40][41][42]. Depending on the electron configuration, a tetrahedral geometry might also be accessible, for instance with Ag + [43].…”