properly furnished, metal complexes from salen ligands can recognize neutral molecules, 1 and extract alkaline metal ions 2 as well as cations and anions 3 in addition to possessing catalytic properties. The interaction between central metal ions and substrates is much controlled by peripheral groups of ligands. In order to establish design criteria for more effective salen complexes, we prepar...

A pioneering research on a self-assembly of the magneto-anisotropic module [Re(CN)7] with the Mn(III) complexes involving Salen type (N,N′-ethylenebis(salicylideneiminate)) Schiff base (SB) ligands was performed using the known [Mn(Salen)(H2O)2]2(ClO4)2·H2O (1) and the firstly synthesized [Mn2(Salen)2OAc]PF6 (2). In the case of 1, a slow diffusion of the component solutions led to the ionic com...

Six transition metal-salen complexes (metal = Fe, Mn and Cr) 1-6 have been synthesized and characterized using different spectroscopic and electrochemical techniques. The binding studies of natural antioxidant, curcumin with the complexes (1-6) have been carried out by electronic absorption spectroscopic technique. The substantial shift in the absorption maximum of complexes (1-6) when they bin...

Unique homoleptic cyclic tetranuclear Ln4(Salen)4 complexes [Ln4(L)2(HL)2(μ3-OH)2Cl2]·2Cl (Ln = Nd, 1; Ln = Yb, 2; Ln = Er, 3; Ln = Gd, 4) or Ln4(Salen)2 complexes [Ln4(L)2(μ3-OH)2(OAc)6] (Ln = Nd, 5; Ln = Yb, 6; Ln = Er, 7; Ln = Gd, 8) have been self-assembled from the reaction of the hexadentate Salen-type Schiff-base ligand H2L with LnCl3·6H2O or Ln(OAc)6·6H2O (Ln = Nd, Yb, Er, or Gd), respe...

The isolation and full characterization of multinuclear Schiff base complexes is reported, and their relevance as precursors for octanuclear Zn(8) salen cluster complex formation is discussed. Starting from simple precursors, three tetranuclear Zn(4) complexes were accessed that incorporate typical half-salen units and comprise of bridging acetates. The use of alternative reaction conditions or...

In this work, we revisited the disassembly approach (also known as Zelder's approach) recently proposed for sensing pyrophosphate (PPi) in water and based on decomposition of metal-salen complexes. A systematic study devoted to structural optimization novel class PPi-responsive fluorogenic probes was conducted. Screening eight different vicinal diamines ( i.e. , bridge salen ligand) combined wi...

Salen Mn complexes, including EUK-134, EUK-189 and a cyclized analog EUK-207, are synthetic superoxide dismutase (SOD) and catalase mimetics that are beneficial in many models of oxidative stress. Though not designed to target the mitochondria, salen Mn complexes show "mito-protective" activity, that is, an ability to attenuate mitochondrial injury, in various experimental systems. Treatment wi...

Salen Mn complexes, including EUK-134, EUK-189 and a newer cyclized analog EUK-207, are synthetic SOD/catalase mimetics that have beneficial effects in many models of oxidative stress. As oxidative stress is implicated in some forms of delayed radiation injury, we are investigating whether these compounds can mitigate injury to normal tissues caused by ionizing radiation. This review describes ...

Salen ligands and relative metal complexes are widely used in many fields, such as catalysis, sensing, optical electronic materials. The introduction of a wide range substituents different positions, both the salen scaffold diamine bridge, allows tuning chemical, catalytic spectroscopic properties. In this contribution, we report synthesis characterization new ligand Co(II) complex bearing male...

Two new neutral hexacoordinated silicon complexes with SiN(4)O(2) (6) and SiN(3)O(2)C (7) coordinating frameworks were synthesized by reaction of the O,N,N,O-donor salen-type ligand 1,2-bis[[(2-hydroxy-4-methoxyphenyl)(phenyl)methylene]amino]ethane (H(2)salen*) with Si(NCS)(4) and HMeSi(NCS)(2), respectively. The complexes 6 [Si(salen*)(NCS)(2)] and 7 [Si(salen*)Me(NCS)] were studied in the sol...