Molybdenum catecholates as models for Mo in biological systems. 1. Synthesis and spectroscopic study on Mo complexes with 3,4-dihydroxybenzoic and 3,4-dihydroxyphenylacetic acid

Investigation of Layered Double Hydroxides Intercalated by Oxomolybdenum Catecholate Complexes

“…Indeed, the complex [Mo 2 O 5 (H 2 O) 2 (3,4-dhb) 2 ] 2-has been described by Karaliota et al (as the tetraphenylphosphonium salt), although not structurally characterized. 40 There is a good match between the vibrational spectroscopic data reported for this complex [ν sym (MoO 2 ) ) 923 (IR) and 928 (Raman) cm -1 , ν asym (MoO 2 ) ) 892 cm -1 (IR), and ν(C-O) cat ) 1286 cm -1 (IR)] and the bands exhibited by the Mo-containing Zn-Al and Li-Al LDHs.…”

Electrospray mass spectral studies on molybdenum complexes with 2,3‐ and 2,5‐dihydroxybenzoic acid and their degradation products

“…Metal complexes of these ligands have been studied by our group in the past, focusing on the type of coordination and their degradation mimicking the above biological systems, e.g. with iron, 8 cadmium, 9 molybdenum, 10 manganese, 11 vanadium 12 and nickel, 13 by spectroscopic techniques including electrospray mass spectrometry (ESMS).…”

“…with the ligands 3,4-DHPA and 3,4-DHBA) bearing a cis-Mo 2 O 5 unit, in water. 10 ES mass spectra have been applied for the characterization of the resulting complexes and for the estimation of the degree of polymerization, of their stability, for the characterization of species in equilibrium in solution and for their degradation. The effect of different coordinating solvents (acetonitrile or methanol) on the nature of the species formed in solution was studied 10 and species formed upon coordination to the cis-Mo 2 O 5 unit were characterized.…”

“…10 ES mass spectra have been applied for the characterization of the resulting complexes and for the estimation of the degree of polymerization, of their stability, for the characterization of species in equilibrium in solution and for their degradation. The effect of different coordinating solvents (acetonitrile or methanol) on the nature of the species formed in solution was studied 10 and species formed upon coordination to the cis-Mo 2 O 5 unit were characterized. 10 In this study, we aimed to characterize the products of the reaction of molybdenum with the ligands 2,3-DHBA and 2,5-DHBA with the aid of ESMS and to study their solution chemistry, e.g.…”

“…The effect of different coordinating solvents (acetonitrile or methanol) on the nature of the species formed in solution was studied 10 and species formed upon coordination to the cis-Mo 2 O 5 unit were characterized. 10 In this study, we aimed to characterize the products of the reaction of molybdenum with the ligands 2,3-DHBA and 2,5-DHBA with the aid of ESMS and to study their solution chemistry, e.g. fragmentation and (redox) degradation in different solvents and to examine whether the action of the metal on the ligand mimicks the relevant biochemical reactions catalyzed by microorganism enzymes.…”