Binary Cu(II)–Mn(II) cyclo-tetraphosphates

Facile synthesis of mononuclear early transition-metal complexes of κ3cyclo-tetrametaphosphate ([P4O12]4−) and cyclo-trimetaphosphate ([P3O9]3−)

“…The complexes (2-5 and 7-11) were isolated in good yield and were fully characterized by means of IR and NMR spectroscopy. The obtained crystal structures and NMR spectroscopy data for these complexes showed that both cyclo-triphosphate and cyclo-tetraphosphate behave as tridentate ligands connected in κ 3 ]•5H 2 O (4.0 g in 200 mL) was loaded into the column. The first 40 mL of eluent was discarded and the remainder was combined with effluent generated by washing the column with 40 mL of water after the elution was finished.…”

“…Bimetallated cyclo-tetrametaphosphate ([P 4 O 12 ] 4− ) and monometallated cyclo-trimetaphosphate ([P 3 O 9 ] 3− ) moieties have a wide range of applications including use as pigments, catalysts, food additives, and fluorescent materials. [1][2][3][4][5][6] The cyclo-tetraphosphate anion is of special interest due to its flexible eightmembered ring structure that can produce complexes with different conformations. 1,[7][8][9] Currently, two different strategies are employed for the preparation of bimetallic complexes of cyclo-tetrametaphosphate.…”

“…One strategy is based on acidification of MCl 2 (M = Co, Fe, Mn, Ni, Cu) by [H 2 PO 4 ] − , followed by thermal treatment at high temperatures (≥600°C), leading to binary oligomeric systems of the general formula M 2 P 4 O 12 . [2][3][4][10][11][12][13][14][15][16][17][18][19] A second strategy developed by Kamimura et al comprises stirring a solution containing a salt of the cyclo-tetrametaphosphate ligand with the desired noble transition metal (such as rhodium, iridium, ruthenium, and palladium) at room temperature overnight. The desired product can then be obtained by further extraction and crystallization from dichloromethane and diethyl ether.…”

Advanced Synthesis and 3D-AFM-Structural Features of Mono-Metalized Cyclotetraphosphates

“…Consequently, it is a major challenge to synthesize binary metal cyclotetraphosphate micro-/nanoparticles with its intrinsic shape-dependent properties and resulting application. Recently, cobalt iron pyrophosphate CoFeP 2 O 7 and cobalt iron cyclotetraphosphate CoFeP 4 O 12 were prepared by mixing of CoCO 3 , Fe and H 3 PO 4 in watermethanol and in water-acetone, respectively [13,14].…”

Heterovalent Zr4+-Cu2+ substitution in zirconium pyrophosphate: From theoretical models to synthesis and utilization

“…In particular, considering pigment field of application, copper phosphates usually have attractive colouration and have been already introduced as inorganic pigments [18,19]. More importantly, Cu oxide compounds represent a potential replacement of blue-shade Copigments, the application of which may face restrictions in future due to ecological considerations.…”