The Mn(III) meso -tetrakis(N-ethylpyridinium-2-yl)porphyrin, MnIIITE-2PyP5+, is a potent SOD mimic in vitro, and was beneficial in rodent models of oxidative stress pathologies. Its high activity has been ascribed to both the favorable redox potential of its metal center and to the electrostatic facilitation assured by the four positive charges encircling the metal center. Its comparison with t...

Three isomorphous compounds M(CHOO)3[NH2(CH3)2] (M = Mn(1 x Mn), Co(2 x Co), Ni(3 x Ni)) have been synthesized in solvothermal conditions. Single-crystal X-ray diffraction shows that they are all crystallized in the trigonal space group R c with small differences in the lattice parameters. Bridged by the three-atom single-bridge CHOO-, M ions form a three-dimensional distorted perovskite-like s...

As part of our studies on the synthesis and the characterization of oxalate-bridged compounds M-ox-M (ox = oxalate dianion and M = transition metal ion), we report the crystal structure of a new oxalate-bridged Mn(II) phase, {(CH6N3)[Mn(C2O4)Cl(H2O)]·H2O} n . In the compound, a succession of Mn(II) ions (situated on inversion centers) adopting a distorted octa-hedral coordination and bridged by...

derivative3–6 (1) have been reported to have a greater tendency to yield polynuclear complexes. This communication presents the X-ray structure of the Ni–Mn–Ni complex (2) prepared using ligand 1 (Fig. 1). The title complex was prepared in two steps. Step 1: After the ligand (0.01 mol, 2.98 g) was dissolved in hot EtOH (50 mL), a solution of NiCl2·6H2O (0.01 mol, 2.37 g) in hot water (30 mL) an...

Caged reagents are molecules from which biological effectors are released by photolysis.[1, 2] In recent studies, caged peptides and proteins have received attention because of their potential importance in investigations of processes such as cell signaling.[3, 4] Although methods suited to specific situations have been explored,[5±10] we have focused our attention on general procedures to cage...

Two mononuclear copper(II) complexes with the unsymmetrical tridentate ligand 2-[((imidazol-2-ylmethylidene)amino)ethyl]pyridine (HL), [Cu(HL)(H2O)](ClO4)2.2H2O (1) and [Cu(HL)Cl2] (2), have been prepared and characterized. The X-ray analysis of 2 revealed that the copper(II) ion assumes a pentacoordinated square pyramidal geometry with an N3Cl2 donor set. When 1 and 2 are treated with an equim...

•Unmodified MOF sensor recognizes all known purine nucleobases, including N6-mA•Characteristic host-guest interactions are accurately monitored by electrochemistry•DFT and synchrotron techniques clearly illustrate the structures N6-methyladenine (N6-mA) has been found as third nucleobase for construction of eukaryotic organism DNA, its detection is thus great value. By making use specific inter...