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Luminescence properties of zinc coordination compounds with indole-3-carboxylate ligand
No full textSintetiziral sem spojino [Zn(I3O)2(H2O)2] iz ZnCl2 in indol-3-ocetne kisline, ki sem jo nato uporabil pri nadaljnjih pretvorbah z uporabo štirih različnih nevtralnih dušikovih ligandov (bipy = 2,2\u27-bipiridin, phen = fenantrolin, bipyam = bipiridinamin, 4 ampy = 4-aminopiridin) v razmerjih 1:1 ob uporabi različnih topil (metanol, etanol, kloroform). Nastale produkte [Zn(I3O)2(bipy)], [Zn(I3O)2(phen)], [Zn(I3O)2(bipyam)] in [Zn(I3O)2(4-ampy)2]∙H2O sem analiziral in okarakteriziral z IR spektroskopijo, rentgensko praškovno analizo (PXRD), elementno analizo (CHN), ter posnel UV-Vis in luminiscenčne spektre v trdnem. Produkte [Zn(I3O)2(bipy)], [Zn(I3O)2(bipyam)] in [Zn(I3O)2(4-ampy)2]∙H2O sem okarakteriziral tudi z jedrsko magnetno resonanco (1H NMR).The starting compound [Zn(I3O)2(H2O)2] was synthesized by the reaction of ZnCl2 and indol-3-acetic acid, which was used as the starting compound for the synthesis of four different zinc complex by adding four different neutral nitrogen-donor ligands in 1:1 ratio with the starting compound in different solvents. The four resulting compounds [Zn(I3O)2(bipy)], [Zn(I3O)2(phen)], [Zn(I3O)2(bipyam)] in [Zn(I3O)2(4-ampy)2]∙H2O (bipy = bipiridin, phen = fenantrolin, bipyam = bipiridinamin, 4 ampy = 4-aminopiridin) have been analysed and characterized by some analytical methods such as: IR spectroscopy, X-ray diffraction (PXRD), nuclear magnetic resonance spectroscopy (1H NMR), CHN elemental analysis as well as UV-Vis and luminescence in the solid-state
Luminiscence attributes of zinc coordination compounds with indol-3-propionic acid or indol-3-acetic acid ligand with neutral nitrogen ligands
No full textV sklopu magistrske naloge sem sprva sintetiziral spojini [Zn(I3P)2] in [Zn(I3O)2]. Pri sintezi obeh navedenih spojin sem kot izhodno spojino uporabil ZnCl2 in ustrezno kislino (indol-3-propanojsko (I3P-H) in indol-3-ocetne kislino (I3O-H)). Pripravljeni spojini sem nato uporabil kot izhodni spojini pri sintezah z različnimi nevtralnimi dušikovimi ligandi. Sinteze sem izvajal v dveh množinskih razmerjih med izhodno spojino cinka in ligandom (1:1 in 1:2), ob uporabi različnih topil (metanol, etanol, kloroform, voda, aceton, dimetilformamid) v različnih kombinacijah. Nastale produkte sem okarakteriziral z analizo razultatov nekaterih fizikalno-kemijskih metod (rentgensko praškovna analiza (PXRD), rentgenska analiza monokristala (XRD), jedrska magnetna resonanca (1 H NMR). Posnel sem tudi IR spektre, UV-Vis in luminiscenčne spektre produktov v trdnem. Z uporabo navedenih metod sem predvidel sledeče formule dobljenih spojin: [Zn(I3P)2(2,2\u27-bipy)] (2,2\u27-bipy = 2,2\u27-bipiridin), [Zn(I3O)2(4,4\u27-bipy)], [Zn(I3P)2(4,4\u27-bipy)] (4,4\u27-bipy = 4,4\u27-bipiridin), [Zn(I3O)2(4-ampy)2]∙H2O (4 ampy = 4-aminopiridin), [Zn(I3P)2(bipyam)] (bipyam = 2,2\u27-bipiridilamin), [Zn(I3P)2(phen)] (phen = 1,10-fenantrolin), [Zn(I3P)2(neo)], [Zn(I3O)2(neo)] (neo = neokuproin).As a part of my master thesis [Zn(I3P)2] and [Zn(I3O)2] were initially synthesized from ZnCl2 and the corresponding acid (indole-3-propanoic and indole-3-acetic acid). Those two compounds were used as starting compounds in syntheses with various neutral nitrogen ligands. Syntheses were performed in two mass ratios between the initial zinc compound and the ligand (1:1 and 1:2), using different solvents (methanol, ethanol, chloroform, water, acetone, dimethylformamide) in different combinations. The resulting products were characterized by analyzing the results of some methods (X-ray powder analysis (PXRD), single crystal X-ray analysis (XRD), nuclear magnetic resonance (1H NMR). IR spectra, UV-Vis and luminescence spectra of the products were recorded in the solid state. Following formulas of the obtained compounds were predicted: [Zn(I3P)2(2,2\u27-bipy)] (2,2\u27-bipy = 2,2\u27-bipyridine), [Zn(I3O)2(4,4\u27-bipy)], [Zn(I3P)2(4,4\u27-bipy)] (4,4\u27-bipy = 4,4\u27-bipyridine), [Zn(I3O)2(4-ampy)2]∙H2O (4 ampy = 4-aminopyridine), [Zn(I3P)2(bipyam)] (bipyam = 2,2\u27-dipyridylamine), [Zn(I3P)2(phen)] (phen = 1,10-phenanthroline), [Zn(I3P)2(neo)], [Zn(I3O)2(neo)] (neo = neocuproine)
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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