Structural Characterization and Magnetic Order in Phenoxy-Substituted Divalent Metal Phosphonate Langmuir–Blodgett Films

Layered Mixed-Metal Phenylphosphonates, MnxCo1−x(O3PC6H5)·H2O: Structure and Magnetic Properties

“…Recently, layered metal phosphates and phosphonates have been shown to exhibit interesting magnetic phenomena, including magnetic ordering, canted antiferromagnetism (14}21), and antiferromagnetic resonance (22), and they have been studied as models for two-dimensional (2D) magnetism. Our group has also extended these studies from the solid-state (22,23), to monolayer (24}27) and multilayer thin "lms (28}33), where similar properties have been observed. As part of our interest in 2D magnetism in metal phosphonate solids and thin "lms, we have investigated a series of mixed-metal Mn>/Co> and Mn>/Zn> phenylphosphonates.…”

“…3) (46). The anisotropy of the EPR linewidth has previously been used to demonstrate the two-dimensional exchange pathways in the layered manganese phosphonates (23,46). As the percentage of Co> in the solid solution increases, the Mn> signal broadens (Fig.…”

Orientation of Phenylphosphonic Acid Self-Assembled Monolayers on a Transparent Conductive Oxide: A Combined NEXAFS, PM-IRRAS, and DFT Study

“…) modes in the PPA 2− spectrum is absent from the PM-IRRAS spectrum; we expect this vibration in the vicinity of 1090−1100 cm −1 based on the spectral behavior of metal phosphonates. 51,52 The ν 19b , ν 19a , and ν 8a normal phenyl ring modes, near 1440, 1490, and 1590 cm −1 , respectively, 49 appear in all three spectra shown in Figure 2, but the ν 19b is especially weak and the ν 19a is enhanced in the spectrum of surface PPA. The ν 20b , ν 2 , and ν 20a C−H modes are observed near 3020, 3060, and 3080 cm −1 , respectively.…”

Conducting and Magnetic Langmuir−Blodgett Films

“…The most extensive magnetic studies have been on manganese phosphonate LB films. ,− In the solid state, manganese alkylphosphonates crystallize in the orthorhombic space group Pmn 2 1 . Sheets of manganese ions, in a distorted square array, are bonded on top and bottom by layers of the organophosphonate (Figure b).…”