2021/04/23 by Kende Attila Béres, Vladimir M. Petruševski, Vladimir Petruševski +9
Materials Science · Chemistry · #Thermal and Kinetic Analysis #Organometallic Compounds Synthesis and Characterization #Metal-Organic Frameworks: Synthesis and Applications
paper · pdf · doi:10.1002/zaac.202100098
Abstract The 1 : 1 type double salt of AgNO 3 and NH 4 NO 3 (NH 4 NO 3 ⋅ AgNO 3, compound 1 ) was prepared and its Raman spectrum was evaluated. IR and far‐IR spectra of compound 1 and its deuterated analog (ND 4 NO 3 ⋅ AgNO 3 , compound 1‐D ) were also studied. We identified two types of nitrate ions, one had a relatively strong, whereas the other is only weakly hydrogen bonded to the surrounding ammonium ions. The thermal decomposition features of compound 1 and its formation mechanism from [Ag(NH 3 ) 2 ]MnO 4 (compound 2 ) at 80 °C with consecutive aqueous leaching of the decomposition residue has been elucidated. The solid phase decomposition product of compound 2 is presumably [Ag(NH 3 )NO 3 ] (compound 3 ), which disproportionates into AgNO 3 and [Ag(NH 3 ) 2 ]NO 3 (compound 4 ). Compound 4 thermally decomposes in the solid phase into Ag+MnO x , while in aqueous solution its hydrolysis results in NH 4 NO 3, which crystallizes out with an equimolar amount of AgNO 3 formed during the disproportionation as compound 1 .