This thesis examined two distinct characteristics of lanthanide and transition metal complexes: Magnetism and Luminescence. In chapter two, synthesis, characterization, magnetic and luminescence investigations of mononuclear lanthanide complexes using Schiff-base tetrazine based ligand were performed. Six novel lanthanide complexes, [LaIIICl3(Htzpy)2], [TbIIICl2(Htzpy)2(MeOH)]Cl, [HoIIICl2(Htzpy)2(MeOH)]Cl, [DyIIICl2(Htzpy)2(MeOH)]Cl, [ErIIICl2(Htzpy)2(MeOH)]Cl and [YbIIICl2(Htzpy)2]Cl have been synthesized successfully and the studies were performed with the application of single crystal X-ray diffractometry, SQUID magnetometry, UV-Vis-NIR spectrometry and custom-built hyperspectral microscope (for luminescence spectroscopy). Chapter three is mainly about the luminescence properties of CoII and CuII complexes using a naphthalimide based ligand. Two complexes, [CoIICl2(Pynap)2] and [CuIIBr2(Pynap)2] were synthesized successfully and characterized using single crystal X-ray diffractometry, UV-Vis spectrometry and hyperspectral microscope (for luminescence spectroscopy). In order to have information about the electrochemical properties of CoII and CuII complexes, their redox activity was monitored by cyclic voltammetry (CV) and compared with the parent ligand. In addition, a rational design to synthesize a new ligand (dipicnap) which consists of both naphthalimide and dipicolinic acid moieties is presented.

Thesis (Ph. D.)--University of California, San Diego, 1981. / Vita. Includes bibliographical references (leaves 87-94).

Thesis (Ph. D.)--University of California, San Diego, 1981. / Vita. Includes bibliographical references (leaves 87-94).

No description available.

The spin ice state is a rare magnetic ground state that can be observed in the pyrochlore oxides, A2B2O7. In this ground state, the spins, align such that two spins point inwards and two outwards on each tetrahedron. The emergence of monopole-like excitations in spin ices has given rise to immense interest in this class of materials. However, a complex set of conditions must be met for a material to adopt the spin ice state, making them exceedingly rare. Prior theoretical studies have put forth two pyrochlores, Ho2Ge2O7 and Pr2Zr2O7, as spin ice candidates. The aim of this project was to fully characterize these compounds and determine their magnetic ground states. We show through magnetometry, heat capacity, and neutron scattering that Ho2Ge2O7 is a new, highly correlated spin ice material. Conversely, Pr2Zr2O7, while exhibiting many spin ice properties, has a ground state which remains undetermined.

The spin ice state is a rare magnetic ground state that can be observed in the pyrochlore oxides, A2B2O7. In this ground state, the spins, align such that two spins point inwards and two outwards on each tetrahedron. The emergence of monopole-like excitations in spin ices has given rise to immense interest in this class of materials. However, a complex set of conditions must be met for a material to adopt the spin ice state, making them exceedingly rare. Prior theoretical studies have put forth two pyrochlores, Ho2Ge2O7 and Pr2Zr2O7, as spin ice candidates. The aim of this project was to fully characterize these compounds and determine their magnetic ground states. We show through magnetometry, heat capacity, and neutron scattering that Ho2Ge2O7 is a new, highly correlated spin ice material. Conversely, Pr2Zr2O7, while exhibiting many spin ice properties, has a ground state which remains undetermined.

Diss. (sammanfattning) Uppsala : Uppsala universitet, 2005. / Härtill 10 uppsatser.

Diss. (sammanfattning) Uppsala : Uppsala universitet, 2005. / Härtill 6 uppsatser.

Diss. (sammanfattning) Uppsala : Uppsala universitet, 2005. / Härtill 5 uppsatser.

Diss. (sammanfattning) Uppsala : Uppsala universitet, 2006. / Härtill 18 uppsatser.