16 Groundwaters at nuclear sites are often characterised by low pH and high nitrate 17 concentrations (10-100 mM). These conditions are challenging for bioremediation, often 18 inhibiting microbial Fe(III)-reduction that can limit radionuclide migration. Here, sediment 19 microcosms representative of the UK Sellafield site were used to study the influence of 20 variable pH and nitrate concentra...

Geobacter species predominate in aquatic sediments and submerged soils where organic carbon sources are oxidized with the reduction of Fe(III). The natural occurrence of Geobacter in some waste sites suggests this microorganism could be useful for bioremediation if growth and metabolic activity can be regulated. 2-DE was used to monitor the steady state protein levels of Geobacter metallireduce...

Single crystals of the title compound, [Co(C(6)H(4)NO(2))(C(18)H(27)N(6)P)]NO(3), were obtained from the reaction of nitrato[tris-(2-isopropyl-imidazol-4-yl)phosphane]cobalt(II) nitrate with picolinic acid in the presence of potassium tert-butoxide as base. The coordination polyhedron around the central Co(II) ion is about halfway between square-pyramidal and trigonal-bipyramidal geometry. In t...

Cobalt(iii) tetrahedral capsules have been prepared using an assembly-followed-by-oxidation protocol from a cobalt(ii) precursor and a readily derivatizable pyridyl-triazole ligand system. Experiments designed to probe the constitutional dynamics show that these architectures are in a non-equilibrium state. A preliminary investigation into the host-guest chemistry of a water-soluble derivative ...

The title compound, [Co(C8H8BrN4O)2]NO3·C3H7NO, is formed of discrete [CoL 2](+) cations, nitrate anions and di-methyl-formamide (DMF) mol-ecules of crystallization. The cation has no crystallographically imposed symmetry. The ligand mol-ecules are deprotonated at the phenol O atom and octa-hedrally coordinate the Co(III) atoms through the azomethine N and phenolate O atoms in a mer configurati...

The metal atom of the title salt, [Co(C(2)H(6)OS)(6)](NO(3))(3), is coordinated by six dimethyl sulfoxide mol-ecules in an octa-hedral geometry. The metal atom lies on a special position of site symmetry. One of the nitrate ions lies on a special position of 3 site symmetry and the other independent ion is disordered about a special position of site symmetry.

In the title compound, [Co(C(19)H(13)ClN(3)O)(2)]NO(3)·2CH(3)OH, the central Co(III) atom in the cation is surrounded by two tridentate ligands in a distorted octa-hedral fashion by four N and two O atoms. Classical O-H⋯O hydrogen bonds link both methanol solvent mol-ecules with the nitrate anion.

In the title compound, [Co(C(4)H(9))(C(14)H(11)N(2)O(2))(2)(C(5)H(5)N)], the Co(III) atom is coordinated by a butyl group, a nitro-gen-bonded pyridine and two N,N'-bidentate diphenyl-glyoximate ligands in a distorted octa-hedral geometry. The crystal structure features two short O-H⋯O bridges between the two chelating anions, with O⋯O distances less than 2.5 Å.

The title salt, [CoBr(C11H27N5)]Br2·2H2O, contains a complex cation with mirror symmetry and two Br(-) counter-anions that are likewise located on the mirror plane. The central Co(III) atom of the complex cation has one Br(-) ion in an axial position, one N atom of the penta-dentate macrocyclic ligand in the other axial position and four N atoms of the ligand in equatorial positions, defining a...