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1

Explosive Coordination Materials : Acyclic Ligands - Review

Rećko Judyta

Central European Journal of Energetic Materials

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2022

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Vol. 19, no. 4

365--378

EN

Coordination explosives form a significant group of energetic materials, which are mainly considered as novel primary explosives. Due to their modular structure, these compounds offer many possibilities for modifying their physicochemical and energetic properties. In this review the properties of complexes containing molecules such as ammonia, hydrazine, ethylenediamine, carbohydrazide, and guanidine derivatives are presented. The types of ligands and their influence on the physicochemical properties and detonation parameters are discussed.

2

Synthesis and spectroscopic interpretations of Co(II), Ni(II) and Cu(II) decxycholate complexes with molecular docking of COVId-19 protease

Refat Moamen S., Bakare Safyah B., Altalhi Tariq A., Alam Kehkashan, Al-Hazmi Ghaferah H.

Polish Journal of Chemical Technology

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2021

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Vol. 23, nr 2

54--59

EN

Co(II), Ni(II) and Cu(II) decxycholate complexes are interesting due to their biologically active and deliberate interest in the research due to their coordination properties. The microanalytical ‘elemental analysis’, molar conductivity, (infrared and Raman) spectroscopy, thermal analyses (TGA/DSC), UV-vis spectra, and ESR for copper(II) decxycholate complex investigations were performed in the structural assignments of Co(II), Ni(II) and Cu(II) decxycholate complexes. Reaction of the sodium deoxycholate ligand (C24H39O4Na) with three transition metal ions form the complexes of formulae, [M(C24H39O4)2(H2O)2] . xH2O where M = Co(II), Ni(II) and Cu(II) where x = 2 for Cu(II) and x = 4 in case of M = Co(II) or Ni(II) metal ions. The FTIR spectra of the complexes show that decxycholate molecule is present as bidentate ligand. Molecular docking utilizing to additionally examine the interaction of COVID-19 (6LU7) with different complexes of deoxycholic acid with Co(II), Ni(II) and Cu(II). Furthermore, in the case of Co(II) deoxycholate complex, the probe is surrounded by amino residues Met235, Pro241, Glu240, Pro108, Gln110, Phe294, and Ile152. The probe molecule of Ni(II) deoxycholate complex is sited close to amino acids Tyr126, Tyr239, Leu287, Leu272, and Lys137. For, Cu(II) deoxycholate complex, the residues of amino acids comprise of Pro132, Pro108, Gln110, Gly109, Ile200, Asn203, Val202, His246, Pro293 and Tyr154. The binding energy was determined from the docking reads for Co(II)–6LU7, Ni(II)–6LU7 and Cu(II)–6LU7 deoxycholate compounds were found to be −446.99, −500.52, −398.13 kcal mol−1 individually.

3

New thiopyridine complexes: design, electrochemical preparation and biological assessment

El-Sabbagh Osama I., Yamany B. Yamany, Eldeab Hany A.

Polish Journal of Chemical Technology

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2019

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Vol. 21, nr 4

20--25

EN

Novel complexes of Ru (III), Cu (II) and Au (III) (2–4) were prepared using 6-phenyl-2-thioxo-4-(trifluoromethyl)-1,2-dihydropyridine-3-carbonitrile (HL, 1) adopting either electrochemical or traditional chemical methods. The electrochemical method is preferred in the synthesis of the complexes than the chemical one because it affords pure products with higher yields in shorter reaction time. The novel thiopyridine complexes were characterized by elemental analyses, IR, 1H, 19F-NMR, TGA and DTA measurements. The antimicrobial activity evaluation revealed that the complex bearing copper metal 3 has nearly the same activity as the reference drug ciprofloxacin. Anti-inflammatory activity evaluation showed that complex 4 containing gold displayed anti-inflammatory activity higher than the reference drug celecoxib upon using carrageenan rat hind paw edema method.

4

Antybiotyki fluorochinolonowe i ich modyfikacje strukturalne

Komarnicka U. K., Walencik P. K., Lesiów M. K., Krupa K.

Wiadomości Chemiczne

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2018

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[Z] 72, 7-8

543--561

EN

The quinolones are synthetic antibiotics derived from nalidixic acid. Chemical modification of basic structure (nalidixic acid) has led to the development of a group of various compounds currently used in medicine. This article discusses the generation of quinolones, mode of their action, and relationship between activity and structure of these antibiotics. The most common quinolones, lomefloxacin and sparfloxacin were discussed in details, also the therapeutic potential of newer agents was reviewed. Recently, understanding of how molecular modifications among quinolone core structure can affect antimicrobial and anticancer activities has progressed rapidly. In this paper we discussed few examples of fluoroquinolone structural modifications. It was proved that many organic and inorganic compounds derived from fluoroquinolones overcame bacterial drug-resistance. Furthermore, chemical modification improved fluoroquinolone’s anticancer activities.

5

The Effect of the Formation of Polymer/Surfactant Complexes on Selected Tribological Properties of Their Aqueous Solutions

Sułek M. W., Jedynak R.

Tribologia

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2018

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nr 5

117--122

EN

Aqueous solutions of sodium alkyl sulphate (surfactant) and polyvinylpyrrolidone (polymer) whose physicochemical properties, including complexing ability, have been widely described in the literature were proposed as a model lubricant. It has been assumed that aqueous solutions of these compounds will favourably modify lubricating properties of water under high load conditions. For this purpose, measurements were made on a four-ball apparatus (T-02 Tester) for aqueous solutions of these compounds. Two kinds of tests were carried out: at constant loads (2, 3, and 4 kN) and variable loads within the range of 0 to 7.2 kN. Unexpectedly, high decreases in motion resistance and wear as well as an increase in antiseizure properties were found in relation to water as a base. The results obtained are so promising that solutions with an optimized composition can find practical applications. The surprisingly high effectiveness of the additives used results from the formation of surfactant/polymer complexes. These adducts adsorb at the interface, and, under friction conditions, they form a lubricant film capable of carrying high loads.

PL

Jako modelową substancję smarową zaproponowano wodne roztwory alkilosiarczanu sodu (surfaktant) i poliwinylopirolidonu (polimer), których właściwości fizykochemiczne, w tym zdolność do kompleksowania, zostały szeroko opisane w literaturze. Postawiono tezę, że wodne roztwory tych związków będą korzystnie modyfikowały właściwości smarne wody w warunkach wysokich obciążeń. W tym celu dla wodnych roztworów tych związków wykonano pomiary na aparacie czterokulowym (Tester T-02). Przeprowadzono 2 rodzaje testów: przy stałych obciążeniach (2, 3, 4 kN) oraz przy zmiennym obciążeniu w przedziale zmienności od 0 do 7,2 kN. Stwierdzono nieoczekiwanie duże obniżenie oporów ruchu i zużycia oraz wzrost właściwości przeciwzatarciowych w odniesieniu do wody jako bazy. Uzyskane wyniki są na tyle obiecujące, że roztwory o zoptymalizowanym składzie mogą znaleźć zastosowanie praktyczne. Niespodziewanie wysoka efektywność stosowanych dodatków jest konsekwencją tworzenia kompleksów surfaktanta z polimerem. Addukty te adsorbują na granicy faz, a w warunkach tarcia tworzą film smarny zdolny do przenoszenia wysokich obciążeń.

6

Adaptacje zabytkowych struktur dla nowych potrzeb – część 1 – wybrane przykłady z Madrytu

Gyurkovich M.

Wiadomości Konserwatorskie

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2017

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Nr 50

30--43

PL

Postęp cywilizacyjny i rozwój technologiczny od stuleci wymuszał zmiany użytkowania przestrzeni miejskich, w tym może przede wszystkim substancji architektonicznej budującej tkankę urbanistyczną. Wraz z wprowadzeniem pojęcia zabytku nastąpił długotrwały proces uświadomienia sobie przez coraz szersze kręgi społeczne potrzeby ochrony dziedzictwa poprzednich epok. Obecnie wydaje się, że – przynajmniej w kręgach decyzyjnych – powszechna jest akceptacja dla konieczności adaptacji historycznych, wartościowych struktur do nowych celów, zamiast ich niszczenia i wyburzania. Globalne procesy ekonomiczne sprawiły, że w ostatnim półwieczu obserwujemy wycofywanie się produkcji przemysłowej, która niegdyś stanowiła o sile i mocnej pozycji naszego kontynentu, w inne obszary świata. Tym samym w miastach europejskich, także w obrębie ich centralnych dzielnic, pozostało wiele opustoszałych i niechcianych budynków, zespołów architektoniczno-urbanistycznych i struktur inżynieryjnych. Świadczące niegdyś o wysokim statusie miast i metropolii zabytki związane z dziedzictwem przemysłowym niejednokrotnie posiadają, poza historyczną, także dużą wartość artystyczną. Towarzyszą im często obiekty infrastruktury technicznej i komunikacyjnej. Takie zespoły i obiekty, które nie mogą już pełnić dotychczasowych funkcji, adaptowane są coraz częściej na rozmaite potrzeby. Wiąże się to także z wytycznymi wynikającymi z potrzeb rozwoju zrównoważonego, w imię których konieczne wydaje się być ponowne wykorzystanie już raz zurbanizowanych obszarów, w celu zachowania jak największych terenów naturalnych poza miastami i wewnątrz nich. Wiele spośród obiektów użytkowanych uprzednio przez przemysł lub wojsko wydaje się być szczególnie predestynowanych do adaptacji na potrzeby kultury, co pokazuje szereg realizacji europejskich. W niniejszym artykule przedstawionych zostanie kilka przykładów takich realizacji z Madrytu.

EN

For centuries civilisational progress and technological development have enforced changes in the use of urban space, including primarily the architectonic substance building urban tissue. With the introduction of the notion of monument there started the lengthy process of realizing the need to protect the heritage of previous epochs among ever-wider social circles. Nowadays it seems that – at least among the decisionmaking circles – it is commonly accepted that valuable historic structures need to be adapted to serve new purposes, instead of being destroyed and demolished. As a result of global economic processes, during the last half a century we could observe withdrawing industrial production which used to decide about the power and strong position of our continent, into other areas of the world. Thus, many abandoned and unwanted buildings, architectonic – urban-planning complexes and engineering structures were left in European cities, and within their central districts. Once bearing evidence of the high status of cities and metropolises, monuments related to industrial heritage frequently posses not merely historic but also considerable artistic value. They are often accompanied by objects of technological and communications infrastructure. Such complexes and objects, which can no longer serve their former functions, are adapted to satisfy different needs. It is also connected to guidelines resulting from the needs of sustainable development, because of which it seems necessary to re-use the already urbanised areas in order to preserve the largest possible natural areas both outside and inside cities. Many objects previously used by the industry or the military seem to be particularly predestined to be adapted to cultural needs, which is shown in several European realisations. This article presents a few examples of such realisations from Madrid.

7

Complex Ranking Procedures

Sandrasagra B., Soltys M.

Fundamenta Informaticae

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2016

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Vol. 144, nr 3/4

223--240

EN

We propose a research program for developing a formal framework for ranking procedures based on the Pairwise Comparisons method. We are interested in the case where relatively few items are to be ranked with a complex procedure and according to a large number of criteria. A typical example of this scenario is a competition where several companies bid for a contract, and where the selection of the winner is done with multiple criteria according to an intricate selection procedure. Several other applications are suggested.

8

Determination of formation constants of uranyl(VI) complexes with a hydrophilic SO3-Ph-BTP ligand, using liquid-liquid extraction

Steczek L., Narbutt J., Charbonnel M. -C., Moisy P.

Nukleonika

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2015

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Vol. 60, No. 4, part 2

821--827

EN

Complex formation between uranyl ion, UO2 2+, and a hydrophilic anionic form of SO3-Ph-BTP4– ligand, L4–, in water was studied by liquid-liquid extraction experiments performed over a range of the ligand and HNO3 concentrations in the aqueous phase, at a constant concentration of nitrate anions at 25°C . The competition for UO2 2+ ions between the lipophilic TODGA extractant and the hydrophilic L4– ligand leads to the decrease in the uranyl distribution ratios, D, with an increasing L4– concentration. The model of the solvent extraction process used accounts – apart from uranyl complexation by TODGA and SO3-Ph-BTP4– – also for uranyl complexation by nitrates and for the decrease in the concentration of the free L4– ligand in the aqueous phase, due to its protonation, bonding in the uranyl complex and the distribution between the two liquid phases. The unusually strong dependence of the D values on the acidity, found in the experiment, could hardly be explained as due to L4– protonation merely. Three hypotheses were experimentally tested, striving to interpret the data in terms of additional extraction to the organic phase of ion associates of protonated TODGA cation with either partly protonated anionic L4– ligands or anionic UO2 2+ complexes with NO3 – or L4–. None of them has been confi rmed. The analysis of the results, based on the formal correction of free ligand concentrations, points to the formation of 1 : 1 and 1 : 2 uranyl – SO3-Ph-BTP complexes in the aqueous phase. The conditional formation constant of the 1:1 complex has been determined, logβL,1 = 2.95 ± 0.15.

9

Badania potencjometryczne, ESI-MS i NMR nad kompleksowaniem magnezu(II) i wapnia(II) wybranymi kwasami bisfosfonowymi w roztworze wodnym

Szpak M., Matczak-Jon E., Kurzak B.

Chemik

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2014

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Vol. 68, nr 4

321--328

PL

Przeprowadzono badania nad równowagami w roztworze układów Mg(II)/Ca(II)-L (L= kwas (cykloheksylo)aminometano-1,1-difosfonowy (1), kwas azepan-1-ylo-metano-1,1-difosfonowy (2), kwas azekan-1-ylo-metano-1,1-difosfonowy (3)) metodami pH-potencjometrii, NMR i ESI-MS. Uzyskane wyniki wskazują, że we wszystkich badanych układach preferowane jest tworzenie kompleksów jednordzeniowych o stechiometrii 1:1. Rozpatrywane związki wiążą koordynacyjnie Mg(II) i Ca(II) poprzez atomy tlenu grup fosfonianowych w szerokim zakresie wartości pH.

EN

Solution equilibrium studies on the Mg(II)/Ca(II)-L systems (L= (cyclohexyl)aminomethane-1,1-diphosphonic acid (1), azepan-1-yl-methane-1,1-diphosphonic acid (2), azecan-1-yl-methane-1,1-diphosphonic acid (3) have been performed by pH-potentiometry, NMR and ESI-MS methods. The obtained results suggest preference for the formation of mononuclear complexes of 1:1 stoichiometry in all studied systems. Compounds under consideration coordinate Mg(II) and Ca(II) through oxygen atoms of the phosphonate groups over a broad pH range.

10

Synthesis, Complexation, Spectral and Antimicrobial Study of Some Novel 5-Bromo-2-Fluorobenzaldehydeoxime

Kumar K., Santhi N.

International Letters of Chemistry, Physics and Astronomy

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2013

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Vol. 3

46-52

EN

In this newly approached method a novel series of Transition metal complexes were synthesized by the reaction of 5-bromo-2-fluorobenzaldehyde (1) react with hydroxylamine in ethanolic solution at room temperature. Mononuclear complexes were synthesized by reaction with Cu(II) , Zn(II) and Hg(II) chloride salts. The complexes were characterized by elemental analysis, Ultraviolet, Infra -red and 1HNMR spectral studies. The antimicrobial activities of the ligand and its metal complexes were estimated.

11

Kompleksy jonów metali d- i f-elektronowych z N-tlenkiem pirydyny i związkami pochodnymi : badania spektroskopowe

Hnatejko Z.

Wiadomości Chemiczne

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2011

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[Z] 65, 5-6

461-501

EN

This article reviews results of studies, collected in the literature, related to complexation abilities of pyridine N-oxides, including forms and properties of dand f-metal ion complexes with this group of ligands. In this paper the synthetic pathways of the ligands, based on an oxidation of the corresponding heterocyclic compounds are presented (Scheme 3) [2, 4, 5]. Substituted pyridine N-oxides form an interesting group of compounds, which have found numerous applications [296-299, 314-318]. They have been used in catalysis, crystal engineering, synthesis of coordination polymers, as well as drugs and components in pharmaceutical chemistry [300-309]. Some of them are useful in destroying of microorganisms and the HIV virus [277, 278, 303-307]. Moreover, they are important compounds in the thermal and photochemical oxidation processes [296-299]. The complexes of metal ions with the N-oxide ligands can be formed by binding an oxygen atom of the N›O group, and/or by binding the substituents present in the aromatic ring, e.g. oxygen atoms of carboxylic groups. The complexes can be obtained in monomeric [64, 159], dimeric [58] or polymeric forms [60, 153, 175]. The formation of polymeric forms is more effective when the distance between the positions of COOH and N›O groups in the aromatic ring increases [168]. Complexes of Ln3+ ions and particularly of Eu3+ with pyridine N-oxides are good luminescent materials, better than their heterocyclic counterparts [180, 211]. The emission intensity of europium ions in these systems depends on the efficiency of the LMCT (ligand-metal charge transfer) and LMET (ligand-metal energy transfer) transitions, as well as on electron-donor properties of the substituents present in the pyridine N-oxide ring [37, 132, 155]. A special role in the complexation of Ln3+ ions plays cryptands, which can encapsulate the metal ion. This process protects the metal ion from a penetration of its first coordination sphere by solvent molecules or counterions [245, 246]. The complexes of europium(III) with macromonocyclic, macrobicyclic and acyclic ligands, equipped with photoactive units such as pyridine N-oxide, 2,2'-bipyridine-N,N'-dioxide or 3,3'-biisoquinoline-2,2'-dioxide in solutions, solid states, and incorporated in a silicate matrices by sol-gel method, gained a lot of attention [247-274].

12

Synthesis, Structural Investigation and Biological Studies of Some Transition Metal Chelates of Acid Hydrazone

Yaul A. R., Dhande V. V., Suryawanshi N. J., Aswar A. S.

Polish Journal of Chemistry

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2009

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Vol. 83, nr 4

565-571

EN

Metal complexes of Ti(III), VO(IV), Cr(III), Mn(III), Fe(III) and Zr(IV) with Schiff base derived from 2-hydroxy-5-methylacetophenone and benzoyl hydrazide have been synthesized and characterized on the basis of elementalanalysis, infrared spectra, magnetic moment, electronic spectra and thermogravimetric studies. Various kinetic parameters evaluated from thermal decomposition data and thermal stabilities of the complexes are also reported. The antibacterial and antifungal activities of 2-hydroxy- 5-methylacetophenone benzoylhydrazone (HMABH) and its complexes have been investigated against various bacterial strains using the disc diffusion technique. All complexes exhibit good biological activity as compared to free ligand. Solid-state electrical conductivity of ligand and its complexes have also been studied over a wide range of temperature and it was found that compounds exhibit semiconucting behavior in the studied range.

13

Magnetic Properties of Novel One-Dimensional Ni(II) Chain and Binuclear Cu(II)-Ni(II) Complexes

Ren S., Ma S. L.

Polish Journal of Chemistry

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2009

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Vol. 83, nr 2

181-186

EN

A novel one-dimensional chain with nickel(II) macrocyclic complex and extended terephthalato-bridged, namely, [Ni(L)(TPHA)]ź8H2O (1) (L = 1,3,6,9,11,14- hexaaza-tricyclo[12.2.1.16,9]octadecane, TPHA = terephthalate dianion) and a new binuclear Cu(II)-Ni(II) complex, [Cu(oxap)Ni(bpy)2](ClO4)2ź2H2O (2) [oxap = N,N?- bis(2-aminopropyl)oxamido dianion, bpy = 2,2?-bipyridine] have been magnetically characterized by variable-temperature magnetic susceptibilities measurements. The fitting results of the agnetic data of all two complexes support exhibiting the occurrence of an antiferromagnetic coupling with J values of -1.25 cm-1 for 1 and -93.9 cm-1 for 2, respectively.

14

Direct Room-Temperature Synthesis of Ni(Hdmg)2 Nanorods

Li C. H., Cao Y. X., Wang J. T., Zhang A. F.

Polish Journal of Chemistry

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2009

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Vol. 83, nr 2

175-180

EN

A simple and fast route based on microemulsion synthesis approach was developed to synthesis one-dimensional (1D) nanostructures of Ni(Hdmg)2 (H2dmg = dimethyl-glyoxime) using nickel chloride and H2dmg as reactants. Scanning electron microscopy (SEM), transmission electron microscope (TEM), IR spectra and elemental analysis were adopted to characterize the as-prepared Ni(Hdmg)2 nanostructures. The sizes of as-prepared nanorods can be adjusted easily and the formation mechanism was proposed tentatively. The successful synthesis of Ni(Hdmg)2 nanorods provide a convenient avenue for tailoring nanocrystals of complexes containing organic groups that are sensitive to temperature.

15

The Role of Histidine Residue in Coordination Abilities of Peptides with Multi Histidine Sequence Towards Nickel(II) Ions

Matera A., Brasuń J., Cebrat M., Świątek-Kozłowska J.

Polish Journal of Chemistry

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2008

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Vol. 82, nr 7

1367-1367

EN

Previous studies on the histidine rich pep tides-Cu2+ systems have shown very efficient coordination abilities and high termodynamic stability of the complexes formed. In this work the ability of histidine-rich peptides with Ni2+ ions are presented. The coordination abilities of the series of the N-protected (Ac-His-Arg-His-Gly-His-Gly, Ac-His-Gly-His-Arg-His-Gly, Ac-Gly-His-His-Arg-His-Gly, Ac-His-His-Gly-His-Arg-Gly) and unprotected peptides (His-Arg-His-Gly-His-Gly, His-Gly-His-Arg-His-Gly, Gly-His-His-Arg-His-Gly, and His-His-Gly-His-Arg-Gly) towards Ni2+ ions were studied by spectroscopic (UV/VIS, CD) and potentiometric methods. For the N-protected peptides the dominant complex species with {3Nim} in physiological pH range has been determined, while for the unprotected peptides the coordination of the first amide nitrogen takes place. More over, for the Ni2+-peptide systems the complexes with two geometries were determined: the paramagnetic octahedral species within the acidic pH range and the diamagnetic square-planar species at pH exceeding 7.

16

Pleistocene stratigraphy of Poland and its correlation with stratotype sections in the Volhynian Upland (Ukraine)

Lindner R., Marks L.

Geochronometria

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2008

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Vol. 31

31-37

EN

Recent stratigraphic subdivision of the Pleistocene of Poland presents 4 complexes: Preglacial, South-Polish, Middle-Polish and North-Polish ones. Each complex comprises a set of stratigraphic units, corresponding to the previously distinguished 8 glaciations/coolings and 7 interglacials/ warmings. Three younger complexes and corresponding extents of Scandinavian ice sheets in Poland are described in more detail. Three older interglacials in Poland Augustovian, Kozi Grzbiet and Ferdynandovian) are characteristic for their bi-optimal climatic sequences but so far, they have no equivalents in loess sections of the Volhynian Upland in the Ukraine. Coolings between the optima of these interglacials are occasionally considered as small glaciations, during which the ice sheet could occupy only a northern part of Poland. All younger interglacials are mono-optimal in Poland and as such, they are also reflected by single palaeosols in loess sections of both countries. Till occurrences in key loess sections of Poland and Ukraine enabled precise delimitation of ice sheet extents, especially within the Middle-Polish Complex with the glaciations Liwiecian, Krznanian and Odranian ascribed to OIS 10, 8 and 6, respectively. During the youngest (Vistulian, Valdai) Glaciation, 3-4 loess deposits were formed in the Lublin and Volhynian Uplands; they are separated by palaeosols that developed during interstadial-rank warmings.

17

Synthesis of a New Thiourea Derivative Substituted 5,6-Diamino-1,10-phenanthroline and Crown Ether and Its Complexes with Copper(II), Nickel(II) and Cobalt(II)

Elmal F. T., Avclata U., Demirhan N., Gül A.

Polish Journal of Chemistry

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2007

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Vol. 81, nr 10

1725-1725

EN

A new thiourea derivative ligand (LH2), 6-amino-5-ylamino-benzo[15-crown-5]-15- ylaminoethanethione[1,10]phenanthroline has been synthesized in the reaction of 5,6-diamino-1,10-phenanthroline with 15-isothiocyanatobenzo[15-crown-5] and its metal complexes with Cu(II), Ni(II) and Co(II) have been prepared. The structures and compositions of the ligand and the complexes have been confirmed by elemental analyses, UV-vis, FTIR, 1H NMR (DMSO-d6), 13C NMR (DMSO-d6), mass spectra (LC-MS) andmagnetic measurements. The metal to the ligand ratio of the Cu(II), Ni(II) and Co(II) complexes have been found to be 1:2. Protonation constants of the ligand and overall formation constants of the complexes have been calculated from potentiometric data using the computer program.

18

Synthesis and Characterization of Copper(II) and Synthesis Nickel(II) Complexes of Isonitrosoacetophenone 4-Aminobenzoylhydrazone

Usluer O., Gup R.

Polish Journal of Chemistry

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2007

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Vol. 81, nr 7

1257-1265

EN

Two types of copper complexes as well as an oximate bridged nickel complex with a new tridentate ligand containing a monoxime and hydrazone moieties have been prepared and characterized by elemental analyses, IR, 1H NMR, UV-VIS and magnetic susceptibility measurements. The reaction of isonitrosoacetophenone 4-aminobenzoylhydrazone (H2L) with CuCl2ź2H2O gives the complex [Cu(H2L)Cl2] where the ligand acts as a neutral O,N,N-tridentate and the coordination takes place in the keto form. The acylhydrazoneoxime ligand reacts with copper(II) and nickel(II) acetate in the presence of the strong base to produce common bimetal(II) oximato complex, [{M(L)}2] in which two copper(II) and nickel(II) atoms are bridged through two N-O bridges of the oximato ligand to afford a binuclear structure. The effects of varying pH and solvent on the absorption behavior of both ligand and complexes have been investigated.

19

Investigation on the Hydrogen Bonding Interaction of Complexes of 2-Butanimine with Water

Fu H., Zhou X. M., Jiang C. Y., Zhou Z. Y.

Polish Journal of Chemistry

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2007

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Vol. 81, nr 9

1667-1667

EN

The hydrogen bonding of 1:1 complexes formed between 2-butanimine and water has been investigated using DFT and MP2 methods at varied basis set levels from 6-311G to 6-311++G(d,p). Four reason able geom tries were considered with the global minimum being a cyclic double-hydrogen bonded structure. The optimized geometric parameters and interaction energies for various isomers at different levels were estimated. The IR intensities and vibrational frequency shifts are reported. The solvent effects on the geometries of the complex have also been investigated using SCRF calculations at the B3LYP/6-311++G(d,p) level. The results indicate that the polarity of the solvent has played an important role on the structures and the relative stabilities of different isomers.

20

Interactions of anionic polysaccharides with carbon nanotubes

Polaczek E., Stobiński L., Mazurkiewicz J., Tomasik P., Kołoczek H., Lin H.

Polimery

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2007

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T. 52, nr 1

34-38

EN

Agarose, i-, k-, and l-carrageenans, and xanthan gum in aqueous solutions interacted with single-walled carbon nanotubes (SWCNTs) as proven by their wetting in solution and by the microRaman spectroscopy, rheological studies, and differential scanning calorimetry. The investigations provided evidence that the effect of complexation of polysaccharides was independent of the possibility of the formation of helical complexes. Complexation involved, to a certain extent, interactions between hydrophobic surface of nanotubes and hydrophobic sides of the saccharide units of polysaccharides. However, clathration of nanotubes in the polysaccharide matrices was also essential. Formation of the clathrate cages involved intra- and intermolecular hydrogen bonds within polysaccharides.

PL

Agaroza, i-, k- i l- karageny oraz guma ksantanowa (wzór I) w roztworze wodnym oddziałują z jednościennymi nanorurkami węglowymi, co potwierdzono analizując widma Ramana oraz wyniki badań reologicznych i skaningowej kalorymetrii różnicowej (tabela 1 i 2). Badania dostarczyły dowodów na to, że efekt kompleksowania polisacharydów nie zależy od możliwości otaczania nanorurek helisami polisacharydowymi. Kompleksowanie polega w pewnej mierze na oddziaływaniach między hydrofobową stroną merów polisacharydów (rys. 2), a hydrofobową powierzchnią nanorurek. Jednakże istotne jest też klatratowanie nanorurek w matrycy polisacharydowej. Klatki tworzą się dzięki zarówno wewnątrz- jak i międzycząsteczkowym oddziaływaniom polisacharydów za pośrednictwem wiązań wodorowych.