Institution
Jan Długosz University
Education•Częstochowa, Poland•
About: Jan Długosz University is a education organization based out in Częstochowa, Poland. It is known for research contribution in the topics: Crystal structure & Luminescence. The organization has 749 authors who have published 2311 publications receiving 19395 citations. The organization is also known as: Higher Teacher Education School.
Papers published on a yearly basis
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TL;DR: In this paper, the crystal structures of two new ternary phases, La{sub 4}Ag{sub 10}Mg{sub 3} and La {sub 4]Ag[sub 10]Mg[sub 3], were refined from X-ray single crystal diffraction data, and the strongest bonds occurred for Ag-Ag and Ag-Mg interactions.
12 citations
TL;DR: In this article, it was shown that new hybrid materials which are active for second harmonic generation (SHG) can be obtained easily from dipolar organoiron(II) NLO-phores like (η2-dppe)(η5-C5Me5)Fe(C≡C-4-C6H4X) (1, X = NO2 and 2; X = C(O)H; dppe = 1,2-(diphenylphosphino)ethane).
Abstract: We show in this contribution that new hybrid materials which are active for second harmonic generation (SHG) can be obtained easily from dipolar organoiron(II) NLO-phores like (η2-dppe)(η5-C5Me5)Fe(C≡C-4-C6H4X) (1; X = NO2 and 2; X = C(O)H; dppe = 1,2-(diphenylphosphino)ethane). These new materials are formed upon UV irradiation of dispersions of 1 or 2 in oligoether-acrylates (OEAs) in the presence of an electrostatic dc field. Monitoring the evolution of the second-order susceptibility of these mixtures during the photosolidification process reveals the appearance of a growing noncentrosymmetric arrangement of the organometallic chromophores. Using an optimized experimental protocol, we find solid samples can be isolated which present sizable second-order optical susceptibilities; an SHG value around 3 pm/V is obtained with the samples containing the nitro-functionalized complex 1, while less intense SHG responses were obtained with dispersions of 2. These results are briefly discussed in the light of D...
12 citations
TL;DR: Different stages of intrinsic nanostructurization related to evolution of free-volume voids, including phase separation, crystalline nuclei precipitation, and growth, were studied in glassy As2Se3 doped with Ga to testify in favor of a native void structure of g-As 2Se3 modified by Ga additions.
Abstract: Different stages of intrinsic nanostructurization related to evolution of free-volume voids, including phase separation, crystalline nuclei precipitation, and growth, were studied in glassy As2Se3 doped with Ga up to 5 at. %, using complementary techniques of positron annihilation lifetime spectroscopy, X-ray powder diffraction, and scanning electron microscopy with energy-dispersive X-ray analysis. Positron lifetime spectra reconstructed in terms of a two-state trapping model testified in favor of a native void structure of g-As2Se3 modified by Ga additions. Under small Ga content (below 3 at. %), the positron trapping in glassy alloys was dominated by voids associated with bond-free solid angles of bridging As2Se4/2 units. This void agglomeration trend was changed on fragmentation with further Ga doping due to crystalline Ga2Se3 nuclei precipitation and growth, these changes being activated by employing free volume from just attached As-rich glassy matrix with higher content of As2Se4/2 clusters. Respectively, the positron trapping on free-volume voids related to pyramidal AsSe3/2 units (like in parent As2Se3 glass) was in obvious preference in such glassy crystalline alloys.
12 citations
TL;DR: The high efficiency of ion-exchange resin in PRB for removal of heavy metals from groundwater was coupled with its reactivity and long barrier lifetime, and the system using resin requires smaller amount to treat a given volume of groundwater as compared to other materials.
12 citations
TL;DR: An approach for identification of provenance of archaeological iron artefacts making use of major oxides and trace elements using seven classifiers built on the basis of Linear Discriminant Analysis, Support Vector Machine, Random Forests, Naive Bayes, K-Nearest Neighbours, Recursive Partitioning and Regression Trees and Kernel Discriminatory Analysis are proposed.
12 citations
Authors
Showing all 755 results
| Name | H-index | Papers | Citations |
|---|---|---|---|
| Mikhail G. Brik | 48 | 408 | 9470 |
| I.V. Kityk | 37 | 288 | 5211 |
| I.V. Kityk | 37 | 287 | 5579 |
| Marek Kowalczuk | 36 | 191 | 4128 |
| Joanna Wietrzyk | 35 | 367 | 4804 |
| Aleksander Sieroń | 33 | 292 | 4462 |
| Lesław Juszczak | 33 | 104 | 2947 |
| Józef Drabowicz | 31 | 277 | 3416 |
| Keshra Sangwal | 30 | 177 | 4053 |
| Oleh Shpotyuk | 29 | 295 | 3471 |
| Adam Opolski | 29 | 92 | 2278 |
| Piotr Dobrzyński | 27 | 129 | 2286 |
| Piotr Kurcok | 25 | 76 | 1794 |
| Jaroslaw Krzywanski | 25 | 77 | 1229 |
| Malgorzata Makowska-Janusik | 24 | 105 | 1786 |