Structural Characterization and Magnetic Order in Phenoxy-Substituted Divalent Metal Phosphonate Langmuir–Blodgett Films
✍ Scribed by Gail E. Fanucci; Melissa A. Petruska; Mark W. Meisel; Daniel R. Talham
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 217 KB
- Volume
- 145
- Category
- Article
- ISSN
- 0022-4596
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✦ Synopsis
Metal phosphonate Langmuir+Blodgett (LB) 5lms of an alkoxyphenyl-substituted phosphonic acid (P4A) have been prepared with the divalent metals Mn 2؉ and Cd 2؉ . Structural characterization with infrared spectroscopy, XPS, and X-ray di4raction shows that the 5lms contain the inorganic continuous lattice of known layered solid-state metal phosphonates with formula M(O 3 PR)H 2 O. Magnetic characterization of the Mn-P4 LB 5lm consists of EPR and magnetometry measurements. The Mn-P4 LB 5lm undergoes a transition to a long-range, canted antiferromagnetic state below 14.8 ؎ 0.2 K and is only the second example of a continuous lattice LB 5lm to exhibit spontaneous magnetization. These results demonstrate that it is possible to prepare metal phosphonate LB 5lms of functionalized organophosphonic acids while retaining both the inorganic continuous lattice structure and magnetic exchange pathways of the known solid-state metal organophosphonates.