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Tytuł:
Charakterystyka procesu aktywacji cząsteczki tlenu molekularnego na solwatowanych wybranych metalach przejściowych (3d) — obliczenia DFT
Characteristics of the oxygen molecule activation process on 3d selected transition metals — DFT calculations
Autorzy:
Anioł, Aleksandra
Niemiec, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/29521103.pdf
Data publikacji:
2023
Wydawca:
Akademia Tarnowska
Tematy:
aktywacja tlenu molekularnego
DFT
solwatowane kompleksy metali przejściowych
activation of molecular oxygen
solvated metal complexes transitional
Opis:
Przedmiotem pracy jest charakterystyka procesu aktywacji cząsteczki tlenu molekularnego na solwatowanych wybranych metalach przejściowych (3d). W niniejszej pracy, korzystając metody DFT (ang. density functional theory), wykonano obliczenia kwantowo-mechaniczne, których celem było scharakteryzowanie struktury elektronowej sześciokoordynacyjnych kompleksów wodnych i acetonitrylowych o wzorach ogólnych [TM(H₂O)₆]n+ i [TM(CH₃CN)₆]n+, gdzie: n = 2, 3 oraz kompleksów z zaadsorbowaną na centrum metalicznym cząsteczką tlenu molekularnego: ([TM(H₂O)₅–O₂]n+ i [TM(CH₃CN)₅–O₂]n+), gdzie n = 2, 3. Do obliczeń wybrano jony metali przejściowych TM (ang. transition metal) z okresu czwartego: Co2+, Fe2+, Mn2+, Ni2+, Zn2+, Cu2+ oraz Cr3+. Na podstawie przeprowadzonych obliczeń stwierdzono, że każdy z analizowanych w pracy parametrów jest funkcją wprowadzonego metalu przejściowego. Co więcej efekt użytego metalu przejściowego na analizowane parametry (np. energetyka orbitali granicznych, rozmiar przerwy energetycznej, ładunki, itd.) przewyższa efekt użytego rozpuszczalnika (H₂O/CH₃CN).
The subject of this research is the characterization of the activation process of the oxygen molecule on solvated selected transition metals (3d). In this study , using the Density Functional Theory, quantum-mechanical calculations were made, the purpose of which was to characterize the electronic structure of water and acetonitrile six-coordinated complexes with general formulas [TM(H₂O)₆]n+ and [TM(CH₃CN)₆]n+, where: n = 2, 3, and complexes with adsorbed at the metal center with an oxygen molecule ([TM(H₂O)₅–O₂]n+ i [TM(CH₃CN)₅–O₂]n+), where: n = 2, 3. The calculations were made using transition metal ions from the fourth period of periodic table: TM = Co2+, Fe2+, Mn2+, Ni2+, Zn2+, Cu2+ and Cr3+. Based on the calculations performed, it was found that each of the parameters analyzed in this work is a function of the introduced transition metal. Moreover, the effect of the transition metal used on the analyzed parameters (e.g. energetics of boundary orbitals, size of the energy gap, charges, etc.) exceeds the effect of the solvent used (H₂O/CH₃CN).
Źródło:
Science, Technology and Innovation; 2023, 17, 1-2; 30-40
2544-9125
Pojawia się w:
Science, Technology and Innovation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis, physicochemical studies, fluorescence behavior, and anticancer properties of transition metal complexes with the pyridyl ligand
Autorzy:
Azam, Mohammad
Al-Resayes, Saud I.
Powiązania:
https://bibliotekanauki.pl/articles/2174812.pdf
Data publikacji:
2022
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
Pyridyl ligand
metal complexes
anticancer activity
Opis:
A novel series of complexes with the formula [MLCl] [M = Co(II) (1), Ni(II) (2), Cu(II) (3), Zn(II) (4)] arising from Pyridyl ligand, N,N’-bis(1-(2-pyridyl)ethylidene)-2,2-dimethylpropane-1,3-diamine), ligand, L, was synthesized and investigated by elemental analyses, FT-IR, 1H and 13C NMR, Powder XRD, and thermal analyses. TGA analysis indicated that all complexes degraded in three different steps, while the PXRD examination showed well-defined sharp crystalline peaks for the complexes, indicating significant crystallinity. The antiproliferative activity of the ligand and its complexes were also evaluated in vitro against the HeLa (Human Cervical Cancer Cells) and HCT116 (Colon Cancer Cells) cell lines. The findings suggested complex 4 to be potential anticancer agent against these cell lines. In addition, ligand and its complexes also exhibited considerable emission properties.
Źródło:
Polish Journal of Chemical Technology; 2022, 24, 3; 35--40
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis, computational, anticancerous and antiproliferative effects of some copper, manganese and zinc complexes with ligands derived from symmetrical 2,2’-diamino-4,4’-dimethyl-1,1’-biphenyl-salicylaldehyde
Autorzy:
Ababneh, Taher S.
El-Khateeb, Mohammad
Tanash, Aissar K.
AL-Shboul, Tareq M.A.
Shammout, Mohammad Jamal A.
Jazzazi, Taghreed M.A.
Alomari, Mohammad
Daoud, Safa
Talib, Wamidh H.
Powiązania:
https://bibliotekanauki.pl/articles/1849324.pdf
Data publikacji:
2021
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
tetradentate schiff base
symmetrical metal complexes
DFT calculation
spectroscopy
anticancerous
antiproliferative
Opis:
Four new symmetrical Schiff bases derived from 2,2’-diamino-4,4’-dimethyl-1,1’-biphenyl-salicylaldehyde have been synthesized and characterized by elemental analysis and different spectroscopic techniques. The reaction of 2,2’-diamino-4,4’-dimethyl-1,1’-biphenyl with two equivalents of 5-tert-butyl-, 3,5-dinitro-, 3,5-dibromo- and 3-tert-butyl-salicylaldehyde yielded 2,2’-bis(5-tert-butyl-salicylideneamino)-4,4’-dimethyl-1,1’-biphenyl (A1) as well as the 3,5-dinitro- (A2), 3,5-dibromo- (A3) and 3-tert-butyl- (A4) substituted derivatives. The tetradentate ligands were then reacted with copper-, manganese- and zinc-acetate producing the tetra-coordinate metal complexes which were characterized by FTIR, UV-Visible spectroscopy, magnetic susceptibility and elemental analysis. Zinc complexes were characterized by 1H-NMR spectroscopy. Density functional theory (DFT) calculations at the B3LYP/6-31G(d) level of theory were carried out to fully optimize and examine the molecular geometries of complexes. Subsequently, IR vibrational and UV-Vis absorption spectra were computed and correlated with the observed values and the results are in good agreement with the experimental data. The anticancerous and antiproliferative activity of the A3 ligand and its metal complexes were determined.
Źródło:
Polish Journal of Chemical Technology; 2021, 23, 1; 7-15
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ionic liquid assisted olefin reactions
Autorzy:
Thirunarayanan, G.
Muthuvel, I.
Sathiyendiran, V.
Powiązania:
https://bibliotekanauki.pl/articles/1075429.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Ionic liquids
Metal complexes
Nano catalysts
alkene reactions
olefin reactions
Opis:
In this review article the authors studied the ionic liquid assisted various alkene reactions with various metal complex catalysts such as Isomerization, Hydrogenation, Hydroformylation, Metathesis-Oligomerization, Dimerization, Arylation, Cyclization, Polymerization, Epoxidation, Michael addition and Tandem Cross-coupling reactions.
Źródło:
World Scientific News; 2019, 126; 36-64
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
SELENO-L-METHIONINE MODULATE THE TOXIC EFFECT OF NEW DOXORUBICIN METAL COMPLEXES IN PROKARYOTIC MODEL –ESCHERICHIA COLI RFM443 RECA::LUX
Autorzy:
Matejczyk, Marzena
Świderski, Grzegorz
Lewandowski, Włodzimierz
Powiązania:
https://bibliotekanauki.pl/articles/895497.pdf
Data publikacji:
2019-02-28
Wydawca:
Polskie Towarzystwo Farmaceutyczne
Tematy:
cancer
selenium
metal complexes
Dox
toxicity
Opis:
Abstract: The main problem of modern cancer therapy is their resistance to the drugs used and the toxicity of drugs to healthy cells of the human body. Hope is natural substances that are protective of cells and often support the action of standard anticancer chemotherapy. Among them are selenium compounds. In the present study, we examined the cytotoxic and genotoxic potency of doxorubicin (DOX) metal complexes as new anticancer drug candidates. We also measured the effect of simultaneous administration of seleno –L-methionine as biologically active agent with DOX and its complexes with Mn, Mg, Fe, Co and Ni in prokaryotic model - Escherichia coli RFM443 with plasmid transcriptional fusion of recA promoter and luxCDABE as a reporter gene. The results obtained by us, indicate high biological activity of metal complexes with doxorubicin. The strongest modulatory effect was observed using the DOX complexes with Co and Ni compared to the DOX. The DOX complexes with Mg, Mn and Fe also showed relatively high biological activity. Simultaneous bacteria culture treatment with SeMet decreased the values of the DOX and its metal complexes cyto- and genotoxic parameters. These results encourage further research to assess the value of the doxorubicin metal complexes as new cytostatic drug candidates. While SeMet may be considered as therapeutic option in cancer treatment as modulation agent in anti-cancer therapy.
Źródło:
Acta Poloniae Pharmaceutica - Drug Research; 2019, 76, 1; 115-125
0001-6837
2353-5288
Pojawia się w:
Acta Poloniae Pharmaceutica - Drug Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis and characterization of transition metal complexes of some novel pyrazolo-chalcone derivatives
Autorzy:
Odedra, Pratap
Rojivadiya, A. J.
Powiązania:
https://bibliotekanauki.pl/articles/1066234.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Pyrazolochalcone derivatives
Thermal gravimetric analysis
Transition metal complexes
Opis:
Some novel pyrazolo-chalcone molecules were synthesized by condensation of pyrzolo aldehyde with appropriate acetophenone. The synthesis of some metal complexes of transition metal was carried out with these pyrazoleo heterocyclic compounds. Each metal complex was synthesized by the reaction of new pyrazolochalcone derivatives with the metal salts such as Co(CH3COO)2·6H2O, Ni(CH3COO)2·6H2O, and Cu(CH3COO)2·2H2O. For the structure elucidation of ligand molecule various spectroscopic techniques such as 1H NMR, IR and mass has been used. The synthesized metal complexes were subjected to thermal study i.e., TGA and DTA in order to check structural conformation of synthesized metal complexes.
Źródło:
World Scientific News; 2019, 131; 242-255
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Antybiotyki peptydowe i ich kompleksy z jonami metali
Peptide antibiotics and their complexes with metal ions
Autorzy:
Stokowa-Sołtys, K.
Powiązania:
https://bibliotekanauki.pl/articles/171960.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Chemiczne
Tematy:
antybiotyki peptydowe
metaloantybiotyki
kompleksy jonów metali
peptide antibiotics
metalloantibiotic
metal ion complexes
Opis:
Metal ions are essential for numerous antibiotics. They play a crucial role in the mechanism of action and may be involved in specific interactions with cell membrane or target molecules, such as: proteins and nucleic acids. Due to the fact that complexes usually poses a higher positive charge than free ligands, they might interact more tightly with DNA and RNA molecules. However, complexes may also form during antimicrobial agents application, because a lot of them possess functional groups which can bind metal ions present in physiological fluids. Many recent studies support a hypothesis that drugs may alter the serum metal ions concentration. Moreover, it has been shown that numerous complexes with antibiotics can cause DNA degradation, e.g. bleomycin which form stable complexes with redox metal ions and split the nucleic acids chain via the free radicals mechanism. Therefore, it is widely used in cancer therapy.
Źródło:
Wiadomości Chemiczne; 2018, 72, 7-8; 497-522
0043-5104
2300-0295
Pojawia się w:
Wiadomości Chemiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Peptydy jako potencjalne ligandy wiążące jony metali przejściowych
Peptides as potential ligands binding transition metal ions
Autorzy:
Krupa, K.
Lesiów, M. K.
Kowalik-Jankowska, T.
Powiązania:
https://bibliotekanauki.pl/articles/171519.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Chemiczne
Tematy:
peptydy
reszta histydylowa
kompleksy metali
model koordynacyjny
peptides
histidine residue
metal complexes
coordination mode
Opis:
Peptides are crucial ligands for transition metal ions and form complexes with them, that can have important biological activity. Many factors impact on the creation of complexes such as: protection of amine group from N-terminal or carboxylate group from C-terminals of the protein, the presence of noncoordinating and coordinating side chains in the peptide sequence, the number of histidyl residues and their location in the peptide chain. In complexes the metal ion can be bound bound by various donor atoms from amino acids residues (e.g. nitrogen, oxygen or sulphur). In general, the protection of N- or C-terminal groups influences the less stable formation of complexes. Stable complexes are created, if the free amine group from the N-terminal is involved in the coordination process. Peptides with noncoordinating side chains include alanine or glycine. Glycine complexes are more stable than these with alanine. Histidyl residue is the most effective amino acid residue in binding metal ions. The amine group of the lysyl residue, thiol from cysteine or carboxylate from aspartyl or glutamyl residues are also functional groups that coordinate metal ions. The coordination process is initiated by a group that anchors metal ion. A free amine group from N-terminus or imidazole nitrogen are the best examples of anchor groups. The metal ions can also be bound through amide nitrogens, after their forced deprotonation by the anchor group and formation of chelate rings. Peptides containing two or more histidyl residues exhibit high structural diversity in the complexes formation. In addition, these peptides can also form macrochelates and polynuclear complexes. The location of amino acid residues in the peptide chain (especially histydyl residue) also results in the thermodynamically stable formation of complexes.
Źródło:
Wiadomości Chemiczne; 2018, 72, 7-8; 597-608
0043-5104
2300-0295
Pojawia się w:
Wiadomości Chemiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis and Safety Properties of New Explosive Coordination Compounds
Autorzy:
Wojewódka, A.
Bełzowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/358028.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
transition metal complexes
5-picrylaminotetrazole
explosives
safety properties
Opis:
The present paper details the synthesis of new explosive complexes of the DDT type and the investigation of their sensitiveness to friction and impact. Fourteen new compounds, specifically nitrate and perchlorate complexes of various transition block metals with 5-(2,4,6-trinitrophenylamino)tetrazole, commonly called picrylaminotetrazole (PAT), were synthesised. The nitrate complexes were obtained in yields varying between 8.1% and 75.1%, whereas the perchlorate complexes had yields between 24.9% and 67.3%, with yields typically near the upper bound of the given ranges for both classes of complexes and the low yields obtained for [Co(PAT)3](NO3)3 and [Cd(PAT)3](ClO4)3 being the exception rather than the rule. The structures of these compounds were unambiguously established via XRF and IR spectroscopy, as well as via elemental analysis. Detailed analyses of the safety properties of these new materials were performed in terms of their sensitiveness to friction and impact. In general, the obtained compounds present relatively low sensitivity to mechanical stimuli, like friction and impact, with the nitrate complexes of Ni and Zn exhibiting high sensitivity to impact (1-2 Nm). The rest of the investigated compounds show low sensitivity to mechanical stimuli, comparable to classical blasting materials like PETN, RDX or HMX. It should be noted that, in general, the nitrates were more sensitive to mechanical stimuli than their perchlorate analogues.
Źródło:
Central European Journal of Energetic Materials; 2017, 14, 2; 351-360
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The novel metal complexes with ketoprofen. thermal and spectroscopy investigations
Autorzy:
Gacki, M.
Kafarska, K.
Powiązania:
https://bibliotekanauki.pl/articles/105654.pdf
Data publikacji:
2017
Wydawca:
Centrum Badań i Innowacji Pro-Akademia
Tematy:
metal complexes
non-steroidal anti-inflammatory drugs
FTIR spectroscopy
TG/DTG analysis
kompleksy metali
niesteroidowe leki przeciwzapalne
spektroskopia FTIR
analiza termiczna (TG/DTG)
Opis:
The novel metal complexes of ketoprofen (Hket)(1) with general formulae Mn(L)4(2), Co(L)4(3), Ni(L)4(4), and Zn(L)4(5) (where L= Hket, ket) were synthesized and characterized by elemental analysis, FTIR- spectroscopy and thermal decomposition techniques. All IR spectra revealed absorption bands related to the asymmetric (νas) and symmetric (νs) vibrations of carboxylate group. The Nakammoto criteria clearly indicate that this group is bonded in a bidentate-chelate mode. The thermal behavior of complexes was studied by TG, DTG methods under dynamic condition in air. Upon heating, all compounds decompose progressively to metal oxides, which are the final products of pyrolysis.
Źródło:
Acta Innovations; 2017, 25; 47-56
2300-5599
Pojawia się w:
Acta Innovations
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Novel silver complexes with popular non-steroidal anti-inflammatory drugs
Autorzy:
Kafarska, K.
Wolf, W. M.
Powiązania:
https://bibliotekanauki.pl/articles/105628.pdf
Data publikacji:
2016
Wydawca:
Centrum Badań i Innowacji Pro-Akademia
Tematy:
non-steroidal anti-inflammatory drugs
metal complexes
FTIR
thermal investigations
niesteroidowe leki przeciwzapalne
kompleksy metali
badania cieplne
Opis:
Non-steroidal anti-inflammatory drugs (NSAID) are class of drugs with antipyretic, analgesic and anti-inflammatory properties. They have also exhibited anti-tumor activity. Even though the mode of their anti-inflammatory activity action is well understood, they exhibit significant adverse effects. Metal complexesation with NSAID may be a promising option for side effects reduction. The novel silver complexes with commonly used non-steroidal anti-inflammatory drugs: ibuprofen, naproxen, mefenamic acid and ketoprofen, were synthesized and characterized by elemental analysis, IR- spectroscopy and thermal decomposition techniques. Coordination of ligands to the silver ions was confirmed by IR spectroscopy. IR data clearly indicate that NSAID anions are bonded in a monodentate mode. The thermal behavior of complexes was studied by TG, DTG and DTA methods in air. Upon heating all compounds decomposed progressively to silver oxide, which was the final product of pyrolysis.
Źródło:
Acta Innovations; 2016, 21; 51-59
2300-5599
Pojawia się w:
Acta Innovations
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis, spectral characterization and biological activity studies of Schiff’s base of 1,5-dimethyl-2-phenyl-2,3-dihydro-1H-pyrazol-4-amine and its metal complexes
Autorzy:
Jadeja, Juvansinh J.
Gondaliya, Mitesh B.
Mokariya, Devang M.
Shah, Manish
Powiązania:
https://bibliotekanauki.pl/articles/1192661.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Schiff Bases
anti-microbial activity
Metal complexes
spectral analysis
Opis:
N,O,O-donating tridentate ligand was prepared by condensed reaction 1,5-dimethyl-2-phenyl-2,3-dihydro-1H-pyrazol-4-amine with derivative of salicylaldehyde and its metal complexes with Zn, Cd and Hg, which is highly stable at room temperature and characterized by Mass spectra, IR, 1H and 13C NMR, ESI-MASS and TGA-DTA. Comparatively studies of anti-microbial and anti-fungal activity of different ligand and its metal complex carried out.
Źródło:
World Scientific News; 2016, 47, 2; 123-150
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bezpośrednia synteza azydków i tioli organicznych pochodnych glikolu etylenowego w zmodyfikowanej reakcji Appela
Direct synthesis of organic azides and thiols derived from ethylene glycol via modified Appel reaction 1
Autorzy:
Stefaniak, M.
Jasiński, M.
Urbaniak, K.
Romański, J.
Seliger, P.
Gutowska, N
Powiązania:
https://bibliotekanauki.pl/articles/141899.pdf
Data publikacji:
2014
Wydawca:
Stowarzyszenie Inżynierów i Techników Przemysłu Chemicznego. Zakład Wydawniczy CHEMPRESS-SITPChem
Tematy:
synteza organiczna
tiole
azydki
reakcja „click”
makrocykle
kompleksy metali
organic synthesis
thiols
azides
click reaction
macrocycles
metal complexes
Opis:
Klasyczną metodę konwersji alkoholi pierwszorzędowych w odpowiednie halogenki alkilowe z użyciem trifenylofosfiny oraz tetrahalogenometanu, tzw. reakcję Appela, zaadoptowano do bezpośredniej syntezy terminalnych tioli i azydków organicznych pochodnych glikolu etylenowego oraz jego siarkowego analogu. W kluczowym etapie opisanej procedury one-pot, otrzymane in situ, w reakcji z N-bromosukcynimidem (NBS), odpowiednie dibromopochodne zostały przekształcone w związki docelowe w reakcji z nukleofilem siarkowym lub azotowym. Wybrane diazydki wykorzystano w syntezie nowych układów makrocyklicznych, które przetestowano pod kątem ich właściwości kompleksotwórczych.
Classical method of conversion of primary alcohols into corresponding alkyl halides by usage of triphenylphosphine and tetrahalogenated methane, so-called Appel reaction, was adopted for the direct synthesis of terminal organic thiols and azides derived from ethylene glycol and its sulfurated analogue. In key step of the presented ‘one-pot’ protocol, corresponding dibromides, generated in situ via reaction with N-bromosuccinimide (NBS), were converted into desired products by treatment with appropriate sulfur or nitrogen nucleophile. A series of diazides and dithiols derived from (poly)ethylene glycols and their sulfur analogues were obtained. Selected diazides were utilized for the construction of novel macrocyclic systems, that were tested incontext of their complexing properties.
Źródło:
Chemik; 2014, 68, 7; 592-599
0009-2886
Pojawia się w:
Chemik
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Removal of Cr(III) ions from water and wastewater by sorption onto peats and clays occurring in an overburden of lignite beds in central Poland
Autorzy:
Kyzioł-Komosińska, J.
Rosik-Dulewska, Cz.
Dzieniszewska, A.
Pająk, M.
Krzyżewska, I.
Powiązania:
https://bibliotekanauki.pl/articles/208228.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
chromium compounds
chlorine compounds
hydrogen bonds
iron compounds
isotherms
lignite
peat
sorption
metal-organic complexes
water
wastewater
związki chromu
związki chloru
wiązania wodorowe
związki żelaza
izotermy
węgiel brunatny
torf
sorpcja
kompleksy metaloorganiczne
woda
ścieki
Opis:
Sorption capacities of low-moor peats and Neogene clays from the overburden of lignite beds in Central Poland for Cr(III) ions as chloride and metalorganic complex ions have been investigated. The binding mechanisms and sorption parameters were determined based on the Freundlich and Langmuir nonlinear sorption isotherms. The sorption capacities of studied materials for Cr(III) ions depended on their properties (porosity, average pore diameters, specific surface area and content of Fe hydroxyoxides) as well as charge of Cr(III) ions, functional groups and their diagonal lengths. Cr(III) ions from chlorides were bound onto sorbents via Coulomb attraction and by Fe hydroxy-oxides. However the complex Cr(III) ions were bound to the sorbent surface via hydrogen bonds between the dye -OH groups and =O of the sorbent functional groups. The equation parameters of sorption isotherms indicate cooperative heterogeneous adsorption at low Cr(III) concentrations and chemisorption at high Cr(III) concentrations
Źródło:
Environment Protection Engineering; 2014, 40, 1; 5-22
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis and Characterization of Cu(II), Ni(II) and Co(II) Based Schiff Base Complexes
Autorzy:
Bhalu, A.
Vilapara, K.
Maru, M.
Shah, M.
Powiązania:
https://bibliotekanauki.pl/articles/412444.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
schiff base
metal complexes
Opis:
N-(3-Bromo-4-hydroxy-5-methoxybenzylidene)-4-Bromobenzenamine was synthesized. This was further used to synthesize Co(II), Ni(II) and Co(II) based metal complexes and characterized by FT-IR, Elemental analysis, ESI Mass and UV spectroscopy.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 12; 51-55
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 27

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