The solutions were prepared with 18 MΩ cm nanopure water. Solution reactions For the synthesis of carbonate GS-9973 manufacturer (or sulfate) green rusts, 50 ml of 0.4 M NaHCO3 (or 0.4 M Na2SO4) solution is put into a cylindrical

glass cell thermostated at 25°C and stirred at 300 rpm under argon for 15 min. Then, 0.5 ml of 1 M FeCl2 solution or 1 M FeSO4 solution is introduced and 10 M NaOH solution is added dropwise to fix the initial pH at a value of 9.5. Finally, argon bubbling is stopped and the cell is opened to air. After about 25 min, a green rust suspension containing 333 μmol FeII is obtained. The AuIII solution contains 0.05 M KAuCl4; the AgI solution contains 0.1 M Ag(NH3)2

+ and 0.3 M NH3. The reactions with green rust suspensions are conducted by adding an appropriate quantity of AuIII or AgI, expressed as a stoichiometric ratio R; R = 100% corresponds to 111 μmol MK0683 concentration AuIII or to 333 μmol AgI. The solution reactions are monitored by recording redox potential with a WTW multimeter, using a platinum working electrode (Radiometer Tacussel, La Fontaine du Vaisseau, Neuilly Plaisance, France) and a homemade AgCl/Ag-0.1 M NaCl reference electrode (0.23 V with respect to standard hydrogen electrode). Characterization The resulting metal-inorganic nanohybrids were characterized by Fourier transform infrared spectroscopy (FTIR) spectrometry, X-ray diffraction, and scanning electron microscopy. After interactions of about 20 to 30 min, solid samples were separated by filtration, carefully rinsed with deionised water, and dried at ambient temperature cAMP for at least 24 h. They were weighted and then characterized. FTIR data were recorded on a Bruker IFS 28 spectrometer (Bruker optics, Wissembourg, France). Powder samples were pressed to pellets with KBr and analyzed by direct transmission mode. XRD measurements were carried out using a Bruker D8 diffractometer with CuKα radiation

(1.5406 Å). Scanning electron microscope (SEM) examinations were performed by a LEO 1530 (Carl Zeiss AG, Oberkochen, Germany) microscope using in-lens and backscattered electron modes. Results and discussion Figure 1 displays potential-time transients recorded during the synthesis of green rust suspension (from point A to point B) and its reaction, beyond point B, with the soluble metal precursor, AuIII (curves a and b) or AgI (curves c and d). The formation of pure carbonate or sulfate green rust suspensions at points B was confirmed by FTIR analysis. Total FeII titrations done at points B gave GSK1904529A values near 67% of the initial FeII quantity, consistently with the formula of carbonate or sulfate green rusts, FeII 4FeIII 2(OH)12CO3,2H2O or FeII 4FeIII 2(OH)12SO4,8H2O [19, 24].