Deaggregation properties and transmetalation studies of a zinc(ii) salen-type Schiff-base complex

Abstract

This paper reports the synthesis and the deaggregation properties of a Lewis acidic Zn(II) salen-type Schiff-base complex derivative from the diaminomaleonitrile, and a systematic detailed study in solution on its...

A simple approach based on transmetalation for the selective and sensitive colorimetric/fluorometric detection of copper(ii) ions in drinking water

“…of aqueous solutions of Cu 2+ salts with those recorded by dissolving the Cu(salmal) complex in MeCN. 54 These findings suggest that 1 can be involved in the selective sensing of Cu 2+ ions in aqueous solution. To assess the sensing performance, various spectrophotometric titrations were carried out with the concentration of 1 being varied in the range of 10-40 mM.…”

“…of aqueous solutions of Cu 2+ salts with those recorded by dissolving the Cu(salmal) complex in MeCN. 54…”

“…Complex 1 was synthesized, purified, and characterized as previously reported. 54 Chemicals were purchased from Sigma-Aldrich and used as received. Ultrapure water purified using the Milli-Q purification system was used to prepare the aqueous solutions of nitrate or perchlorate salts.…”

“…[47][48][49][50][51][52][53] We have demonstrated that in solution of weak coordinating solvents a 5-tert-butyl substituted Zn(salmal) complex (1) forms relatively stable adducts which easily transmetalate with divalent ions of the first transition series, but with a different rate. 54 In particular, the transmetalation with Cu 2+ ions is faster than that with other cations, regardless of the nature of the counteranion. These results stimulated us to further explore the selective and sensitive detection of Cu 2+ ions using this simple and straightforward approach.…”

Metal Complexes with Schiff Bases: Data Collection and Recent Studies on Biological Activities

“…Metal complexes of different metals with SBs have demonstrated a myriad of activities [ 22 , 23 ], and catalytic applications [ 24 ] in which metals are represented by Mo [ 25 ], Cu [ 26 , 27 , 28 ], Zr [ 29 , 30 , 31 ], Pd [ 32 ], Cu [ 33 ], Ni [ 34 ], Ru [ 35 ], Mn [ 36 ], Zn [ 37 , 38 ] and W [ 39 ]. Several studies have been carried out on the transmetalation of Zn-SB complexes with other metal ions [ 40 ] for various purposes, such as the detection of Cu 2+ ions in aqueous solution [ 41 ] and the inhibition of acid-induced steel corrosion [ 42 ]. Recent studies addressed luminescence and fluorescence taking advantage of lanthanide (Ln 3 + ) complexes with SBs [ 43 ].…”