Mechanochemical Access to Elusive Metal Diphosphinate Coordination Polymer

Abstract

Several binary metal diphosphinate compounds (ML) have been reported for diphosphinate bonded by a single methylene fragment. In case of longer bridges, binary products are difficult to isolate in crystalline form. Here, using a solvent assisted mechano-chemistry synthesis, we report two new ML crystalline phases, one hydrated and one anhydrous. The hydrated phase is a 2D coordination polymer with an open framework structure. Its network displays a new topology for coordination polymers and metal organic frameworks. The thermal behavior of the two phases has been studied. Finally, the importance of the bridge length is discussed in view of known metal diphosphinate compounds.

Synthesis and electrochemical properties of metal(ii)-carboxyethylphenylphosphinates

“…2 Available data on metal phosphinates indicate that the dimensionality of these solids is highly dependent on the type of the phosphinic acid (R 1 R 2 POOH) employed. So, monophosphinic acids usually lead to 1D solids, transition metal bisphosphinates form 2D networks, 3,4 whereas multifunctional ligands like those having both, carboxylic and phosphinic groups, e.g., (2carboxyethyl)(phenyl)phosphinic acid, give rise to 2D or 3D networks. [5][6][7][8][9] By employing the latter ligand, Mn 2+ -and Co 2+derivatives, M 3 (L) 2 (OH) 2 , with interesting magnetic properties were obtained.…”

Copper Phosphinate Complexes as Molecular Precursors for Ethanol Dehydrogenation Catalysts

“…Applying molecular precursors to prepare structure-controlled catalysts with homogeneously dispersed catalytic species on the support is a well-known and widely used method. − However, there is a lack of information on applying phosphorus-containing metal complexes (phosphates, phosphonates, and phosphinates) as precursors to nonoxidative ethanol dehydrogenation catalysts. Numerous studies have been conducted on copper phosphates − and phosphonates. − However, the application of phosphinate ligands for the formation of copper complexes has seen limited exploration, with a modest number of copper complexes based on phosphinate ligands present to date. − A small amount of the copper complexes with macrocyclic ligands possessing pendant phosphinate groups are also being studied for potential medical applications. − The formation of insoluble polymeric compounds is commonplace in such systems, which is a factor that limits their potential application as molecular precursors. Typical strategies employed for the isolation of molecular species include the utilization of bulky ligands, ,…”

Exploiting the Multifunctionality of M2+/Imidazole–Etidronates for Proton Conductivity (Zn2+) and Electrocatalysis (Co2+, Ni2+) toward the HER, OER, and ORR

“…Metal phosphonates represent a rich area of coordination and materials chemistry that has seen impressive growth in the last few decades − due to their multiple properties as proton conductors, , scale and corrosion inhibitors, catalysts, , and as platforms for pharmaceutical drug delivery, , among others. By combining (poly)­phosphonic acid linkers , and a variety of synthetic methodologies, including mechanochemical , and high-throughput , procedures, numerous metal phosphonates have been prepared for targeted applications, as they are amenable to establish appropriate structure/property relationships, assisted by advanced characterization techniques, such as synchrotron radiation or electron diffraction tomography …”