Dysprosium spectroscopy

French chemist who discovered gallium, samarium, and dysprosium, and perfected methods of separating the rare earths He ranks with Bunsen, Kirch-hofiF, and Crookes as one of the founders of the science of spectroscopy. 

Boisbaudran s researches on the rare earths also yielded a rich harvest of results, for he discovered samarium and dysprosium (2). His investigations in the field of spectroscopy were also of high merit... 

Roesky introduced bis(iminophosphorano)methanides to rare earth chemistry with a comprehensive study of trivalent rare earth bis(imino-phosphorano)methanide dichlorides by the synthesis of samarium (51), dysprosium (52), erbium (53), ytterbium (54), lutetium (55), and yttrium (56) derivatives.37 Complexes 51-56 were prepared from the corresponding anhydrous rare earth trichlorides and 7 in THF and 51 and 56 were further derivatised with two equivalents of potassium diphenylamide to produce 57 and 58, respectively.37 Additionally, treatment of 51, 53, and 56 with two equivalents of sodium cyclopentadienyl resulted in the formation of the bis(cyclopentadienly) derivatives 59-61.38 In 51-61 a metal-methanide bond was observed in the solid state, and for 56 this was shown to persist in solution by 13C NMR spectroscopy (8Ch 17.6 ppm, JYc = 3.6 2/py = 89.1 Hz). However, for 61 the NMR data suggested the yttrium-carbon bond was lost in solution. DFT calculations supported the presence of an yttrium-methanide contact in 56 with a calculated shared electron number (SEN) of 0.40 for the yttrium-carbon bond in a monomeric gas phase model of 56 for comparison, the yttrium-nitrogen bond SEN was calculated to be 0.41. 

Hughes MS, Thomas GMH, Paeteidge S and Biech NJ (1988) An investigation into the use of a dysprosium shifr reagent in the nuclear magnetic resonance spectroscopy of biological systems. Bio-chem Soc Trans 16 207-208. 

The bis(methylcyclopentadienyl) rare earth chorides of gadolinium, erbium and ytterbium have been prepared according to eq. (17) as colorless, pink or red crystals. They are monomeric in tetrahydrofuran, but dimeric in benzene solution (Maginn et al., 1963). The corresponding dysprosium and holmium compounds were prepared by Crease and Legzdins (1973b), the yttrium and lutetium derivatives by W.J. Evans et al. (1982a) and characterized by NMR spectroscopy. 

In Chapters I and 2, an introduction is made to the synchrotron Mossbauer spectroscopy with examples. Examples include the/ns/tu Mossbauer spectroscopy with synchrotron radiation on thin films and the study of deep-earth minerals. Investigations of in-beam Mossbauer spectroscopy using a Mn beam at the RIKEN RIBF is presented in Chapter 3. This chapter demonstrates innovative experimental setup for online Mossbauer spectroscopy using the thermal neutron capture reaction, Fe (n, y) Fe. The Mossbauer spectroscopy of radionuclides is described in Chapters 4-7. Chapter 4 gives full description of the latest analysis results of lanthanides Eu and Gd) Mossbauer structure and powder X-ray diffraction (XRD) lattice parameter (oq) data of defect fluorite (DF) oxides with the new defect crystal chemistry (DCC) Oq model. Chapter 5 reviews the Np Mossbauer and magnetic study of neptunyl(+l) complexes, while Chapter 6 describes the Mossbauer spectroscopy of organic complexes of europium and dysprosium. Mossbauer spectroscopy is presented in Chapter 7. There are three chapters on spin-state switching/spin-crossover phenomena (Chapter 8-10). Examples in these chapters are mainly on iron compounds, such as iron(lll) porphyrins. The use of Mossbauer spectroscopy of physical properties of Sn(ll) is discussed in Chapter I I. 

In principle, transport of any ion for which NMR-active isotopes and a suitable shift reagent exist can be investigated and in fact the use of NMR to observe transport of Na+, Cl , or Br has been suggested early on. Nonetheless, its routine use was mainly limited to Na NMR spectroscopy, in which external dysprosium triphosphate is used as a paramagnetic shift reagent to separate the chemical... 

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