Search results for "GST"
showing 10 items of 874 documents
Gada pārskats, 2014
2015
Polyoxometalate Monolayers in Langmuir-Blodgett Films
2005
Langmuir and Langmuir-Blodgett (LB) films of a variety of polyoxometalates of different shapes, sizes, and charges were prepared by taking advantage of the adsorption properties of these polyanions on a positively charged monolayer of an organic surfactant spread on water. Three different aspects were investigated. 1) The electrochemical and electrochromic properties of LB films containing the easily reducible polyoxoanion [P2Mo18O62]6-. Absorbance changes of these LB films deposited onto an ITO substrate have been induced by repeated switching of the applied potential. These changes are due to the formation of the colored reduced forms of the polyanion. Coloration and bleaching of the LB f…
Mononuclear lanthanide single molecule magnets based on the polyoxometalates [Ln(W5O18)2]9- and [Ln(beta2-SiW11O39)2]13- (Ln(III) = Tb, Dy, Ho, Er, T…
2009
The first two families of polyoxometalate-based single-molecule magnets (SMMs) are reported here. Compounds of the general formula [Ln(W(5)O(18))(2)](9-) (Ln(III) = Tb, Dy, Ho, and Er) and [Ln(SiW(11)O(39))(2)](13-) (Ln(III) = Tb, Dy, Ho, Er, Tm, and Yb) have been magnetically characterized with static and dynamic measurements. Slow relaxation of the magnetization, typically associated with SMM-like behavior, was observed for [Ln(W(5)O(18))(2)](9-) (Ln(III) = Ho and Er) and [Ln(SiW(11)O(39))(2)](13-) (Ln(III) = Dy, Ho, Er, and Yb). Among them, only the [Er(W(5)O(18))(2)](9-) derivative exhibited such a behavior above 2 K with an energy barrier for the reversal of the magnetization of 55 K. …
Co-crystallization of Keggin type polyoxometalates [HL]3[PW12O40] and [Ln(DMF)8][PW12O40] (Ln=La, Dy, Yb) (L=N-(2-hydroxyphenyl)-3-methoxy-salicylide…
2016
Abstract Four new Keggin type polyoxometalate clusters [HL]3[PW12O40]·5MeOH (1) and [Ln(DMF)8][PW12O40] {Ln = La (2), Dy (3), Yb (4)} (L = N-(2-hydroxyphenyl)-3-methoxy-salicylideneamine) have been synthesized. Co-crystallization of complex 1 with each of the three complexes 2–4 takes place when the Schiff base ligand is treated with hydrated phosphotungstic acid, H3[PW12O40]·xH2O, hydrated lanthanide nitrate, Ln(NO3)3·6H2O in the presence of Ni(NO3)2·6H2O. The Schiff base ligand is protonated in complex 1 and thus it is neutralizing the charge of the polyoxotungstate anion, [PW12O40]3−. A dimethylformamide (DMF) coordinated trivalent lanthanide ion balances the negative charge of the polyo…
Izglītības vadība (Latvijas Universitātes raksti; 749. sēj.)
2009
Artura Ozola dienas konference,43: Alvils Augstkalns (1907-1940) un baltu valodu pētniecība
2007
Teksts latviešu, lietuviešu valodās.
Habilitētā fizikas doktora, profesora Jura Zaķa biobibliogrāfiskais rādītājs
2018
Latvijas Universitātes rektora, habilitētā fizikas doktora, profesora Jura Zaķa biobibliogrāfiskajā rādītājā ietvertie publicēto darbu (1947-2017) bibliogrāfiskie apraksti sagrupēti nodaļās: Profesora Jura Zaķa monogrāfijas. Profesora Jura Zaķa publikācijas iespieddarbos. Profesora Jura Zaķa autorapliecības, patenti. Profesora Jura Zaķa sagatavotie darbi. Profesora Jura Zaķa rediģētie un recenzētie darbi. Profesora Jura Zaķa vadītās, recenzētās, oponētās disertācijas. Intervijas un sarunas ar profesoru Juri Zaķi. Raksti par profesoru Juri Zaķi.
Pētera Ķiķaukas runa Akadēmiskās kopas sanāksmē 1953. gada 3. oktobrī
1953
Prof. dr. philol. Pētera Ķiķaukas runa par godu Latvijas Universitātes 34 jubilejai. Runa nolasīta Akadēmiskās kopas sanāksmē Y.M.C.A. (Young Men’s Christian Association) telpās Kanādā. Runa ir vēstures avots par trimdas latviešu dzīvi.
Pētera Ķiķaukas dienesta gaitas apraksts
1940
Rokrakstā rakstīta dienesta – iegūtā izglītība, darba vietas, apbalvojumi un komandējumi uz ārzemēm.