Crystallization and characterization of the compounds Gly·MSO4·mH2O (M = Mg2+, Mn2+, Fe2+, Co2+, Ni2+, Zn2+; m= 0, 3, 5, 6)

Structural, magnetic, thermal and visible light-driven water oxidation studies of heterometallic Mn/V complexes

“…The ν(NH) and ν(CH) vibrations are obscured by broad bands of H-bonded water below 3500 cm -1 . The IR spectra of 1 and 2 demonstrate characteristic features of coordinated aminoacids (HGly and β-HAla)[14,19,20]: ionic bonding of zwitterionic HGly to Mn via oxygen and presence of non-coordinated HGly in 1, and unidentate of β-HAla in 2, in accordance with ref. 14.…”

In situsingle-crystal to single-crystal (SCSC) transformation of the one-dimensional polymercatena-poly[[diaqua(sulfato)copper(II)]-μ2-glycine] into the two-dimensional polymer poly[μ2-glycine-μ4-sulfato-copper(II)]

“…Further heating gave an amorphous powder. This last structure is isostructural with the cobalt(II) (Tepavitcharova et al, 2012), the iron(II) (Oguey et al, 2013b) and the zinc(II) (Oguey et al, 2013c) analogues.…”

“…However, restricting the search to glycine (NH 2 CH 2 COO; with any type of C-O bond), sulfate, Mg II and first-row transition metals indicated the presence of only 14 complexes, some of which have been reported more than once. These include a number of ionic complexes, such as tetraaquabis(glycine-O)iron(II) hexaaquairon(II) bis(sulfate) (Lindqvist & Rosenstein, 1960), onedimensional coordination polymers, for example, catenapoly[triaqua( 2 -glycine)sulfatozinc(II)] (Fleck & Bohatý, 2004) and catena-poly[hexaaquabis( 2 -gylcine)disulfatodicobalt(II)] (Tepavitcharova et al, 2012), and a two-dimensional Mn II coordination polymer (Weng et al, 2009). In all of these complexes, the glycine molecule exists in the zwitterionic form and coordinates the metal via the carboxylate group, the amine group always being protonated.…”

“…For example, on heating, in a capillary on the diffractometer, a crystal of the zinc(II) ionic complex tetraaquabis(glycine-O)zinc(II) hexaaquazinc(II) bis(sulfate) (Tepavitcharova et al, 2012), two successive SCSC transformations were observed. At ca 343 K it transformed into a one-dimensional polymer isotypic with (I), with a loss of eight water molecules (Oguey et al, 2013a).…”

“…Recently, the equilibrium crystallization and characterization of a series of glycine metal sulfate complexes have been reported (Tepavitcharova et al, 2012). The Gly-MSO 4 -H 2 O systems (M = Mn II , Fe II , Co II , Zn II and Mg II ) were studied by evaporation of supersaturated solutions at different fixed temperatures.…”