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https://hdl.handle.net/10316/4364
Title: | X-ray diffraction and Mössbauer spectrometry studies of molecular iron compounds | Authors: | Costa, B. F. O. Greneche, J. M. Silva, M. Ramos Pereira, L. C. J. |
Keywords: | Trinuclear iron compounds; Mössbauer spectrometry; X-ray diffraction | Issue Date: | 2007 | Citation: | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 580:1 (2007) 408-411 | Abstract: | We have synthesized two new iron complexes that have been structural and magnetically characterized: diphenylguanidinium hexafluoroferrate and hexakisvaline-oxo-triiron(III) chloride. The former crystallizes as monomers with the fluoride ions six-coordinating the Fe(II) ion. Valine iron chloride is comprised of trinuclear complexes, with a well ordered oxo-centered carboxylate core and some disordered organic ligands. The magnetization curves show a paramagnetic behavior. The Mössbauer measurements as a function of temperature show a paramagnetic behavior at 300 K with two Fe sites (one quadrupolar doublet and a broad single line). At 4.2 K, besides the quadrupolar doublet there is a magnetic component which can be attributed to a slow relaxation phenomenon associated to these samples. | URI: | https://hdl.handle.net/10316/4364 | DOI: | 10.1016/j.nima.2007.05.066 | Rights: | openAccess |
Appears in Collections: | FCTUC Física - Artigos em Revistas Internacionais |
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