Phosphide is an element that is present in a variety of biomolecules, such as DNA, RNA and proteins. It is also found in the energy and transport systems of cells. In addition, phosphates are a component of the ATP energy storage and transport system.
Manganese phosphide is a nanosheet assembly composed of six different Mn centers, stabilized by asymmetric geometry. This asymmetrical structure is believed to provide superior activity for MnIII, which is a key intermediate for water oxidation. These self-assembled carbon networks can be used for efficient electrochemical catalysts and for monitoring superoxide anions released from HepG2 cells.
The nanosheet assembly is prepared by sonication. The sonication results in a thin nanosheet structure. These nanosheets are then assembled into a three-dimensional superstructure. Scanning transmission electron microscopy (TEM) was used to study the elemental distributions of the Mn-LNPs.
EDX analysis indicates that the nitrogen and carbon contents of the Mn-LNPs are largely reduced. Furthermore, the elemental distributions of these manganese phosphide elements are consistent with the diamagnetic character of the material.
A DFT analysis of the full structure of these Mn-LNPs confirms the presence of a singlet ground state. This ground state is consistent with the 18-eletron count of Mn and the diamagnetic character of the material. Moreover, the MnPi currents display semiconducting behaviour within the precatalytic potential range.
During the oxidation of MnII/III, the protons of the ligands are dissociated and lower the required activation energy of the electron transfer process. Therefore, phosphates and aqua ligands are essential for proton transfer.