45986-31-0Relevant articles and documents
Tailoring the photoluminescence properties of transition metal phosphonates
Singleton, Richard,Bye, James,Dyson, James,Baker, Gary,Ranson, Robert M.,Hix, Gary B.
, p. 6024 - 6030 (2010/08/06)
A series of phenylphosphonates, Zn1-xMnx(O 3PC6H5)·H2O, where x = 0, 0.005, 0.25, 0.5, 0.75 and 1.0, has been prepared and their photoluminescence responses studied. The presence of Mn in the sample results in a red emission, whilst when x = 0 the emission is green. Levels of Mn 6(m-O3PC6H 4CO2)2 has been prepared by hydrothermal reaction of Ag(NO3) and m-phosphonobenzoic acid. The material has a 1D channel structure in which the channels are lined with the phenyl groups. Ag6(m-O3PC6H4CO2) 2 shows a green luminescence response to laser excitation, whilst the related Zn material, Zn3(m-O3PC6H 4CO2)2, shows an unusual yellow emission.
Layered mixed-metal phenylphosphonates, MnxCo1-x(O3PC6H 5)·H2O: Structure and magnetic properties
Culp,Fanucci,Watson,Morgan,Backov,Ohnuki,Meisel,Talham
, p. 362 - 370 (2008/10/08)
Mixed metal phenylphosphonates of composition MnxCo1-x(O3PC6H 5)·H2O were prepared with 0≤ x ≤ 1. Atomic absorption, X-ray powder diffraction, and electron paramagnetic resonance measurements indicate that the mixed-metal solid solutions are homogeneous and isostructural with the single-metal-parent compounds over the entire concentration range, with a small, systematic evolution of the a and c in-plane unit cell parameters. The temperature dependence of the magnetic data for the pure Mn2+ (x=1) and pure Co2+ (x=0) samples was fitted by standard 2D Heisenberg and 2D Ising models, respectively, yielding nearest-neighbor exchange interaction energies of J = -2.27±0.02 K for Mn(O3PC6H5)·H2O and J = -2.43±0.05 K for Co(O3PC6H5)·H2O. The magnetic phase diagram, down to 2 K, was constructed over the entire composition range. Both dc and ac magnetic susceptibilities were used to identify the transitions to low temperature, long-range-ordered antiferromagnetic states. In the Mn2+- and Co2+-rich regions, the ordering temperature, TN, decreases relative to the pure materials, as expected for magnetic ion impurity doping. For intermediate values of x, Mn2+-Mn2+ interactions dominate, resulting in a minimum in TN near x = 0.25. A weak negative magnetization was observed for x ≤ 0.25. No evidence of spin glass behavior was observed for any concentration at any temperature.
