A cross-linked chitosan derivative (CCTS) was synthesized via cross-linking of epichlorohydrin and grafting of triethylene-tetramine. The adsorption performance and capacity of the raw chitosan (CTS) and its derivative were also investigated for removal of Co2+ from aqueous solution. A maximum a...
A novel series of the heterometallic lanthanide(III) ionic cluster complexes of general formula Ln9(acac)16(OH)10[W2(CO)10(μ-H)] with Ln=Sm (1a), Eu (1b), Gd (1c), Dy (1d), and Yb (1e) was prepared and characterized by FTIR, 1H NMR spectroscopy and single crystal X-ray analysis. The cluster ser...
New isostructural complexes [Ln(CymCOO)(acac)2(H2O)]n (Ln = Eu (1), Gd (2), Tb (3), Dy (4), Ho (5), Er (6), acac – acetylacetonate (pentane-2,4-dionate) anion) having a polymeric structure based on CymCOO-bridged {Ln(acac)2(H2O)} fragments were prepared by exchange reactions of hydrated Ln acet...
Treatment of europium(III) acetylacetonate [Eu(acac)3 · nH2O] with dilithium phthalocyaninate (Li2Pc) afforded Eu(acac)(Pc), which induced cyclic tetramerisation of 4,5-disubstituted phthalonitriles C6H2R2(CN)2 (R = n-C7H15, OC5H11) producing the unsymmetrical bis(phthalocyaninato)europium(III)...
Phosphorescence quantum yield measurements of fluorescent and phosphorescent samples require the use of time-gated fluorimeters in order to discriminate against the fluorescence contribution. As reference standard a non-fluorescent luminescent compound is needed for absolute phosphorescence quan...
Rare earth elements possessing unique 4f electrons have been investigated as excellent candidates for luminescent centers in doped II-VI nanocrystals, because of their abundant emission colors based on the 4–4f or 5d-4f transitions. In particular, ZnSe quantum dot (QDs) fabricated with the lant...
Spectroscopic properties of blends formed by bisphenol-A polycarbonate (PC) and poly(methyl methacrylate) (PMMA) doped with Europium (III) acetylacetonate [Eu(acac)3], have been studied by photoacoustic spectroscopy (PAS) and photoluminescent (PL) spectroscopy. Emission and excitation spectra, e...
Blends stand out as simple and cheap materials with unique properties. The miscibility of blends formed by bisphenol-A polycarbonate (PC) with poly(methyl methacrylate) (PMMA) doped with europium (III) acetylacetonate have been studied by differential scanning calorimetry (DSC), infrared spectro...
Two new octa-coordinated red emitting complexes of the type [Ln(acac)3(Br2-phen)] [acac: acetylacetonate, Br2-phen: 4,7-dibromo-1,10-phenanthroline, Ln: Sm(III) and Eu(III)] have been synthesized and characterized. Single crystal X-ray diffraction (SCXD) of [Eu(acac)3(Br2-phen)] and [Eu(acac)3(H...
The trivalent europium ion (Eu3+) is well known for its strong luminescence in the red spectral region, but this ion is also interesting from a theoretical point of view. Due to the even number of electrons in the 4f shell (4f6 configuration), the crystal-field perturbation by the crystalline ho...
A series of rhenium complexes was synthesized as model compounds for the corresponding radioactive technetium-99m complexes for preliminary biological investigations. In a ‘3+1’ mixed-ligand approach the tropanol molecule was linked with the metal core through a ω-mercaptoester group as monod...
The standard (p°=0.1 MPa) molar enthalpies of formation ΔfHm°(cr) atT=298.15 K were determined using static-bomb calorimetry for crystalline 4-methylpyridine N-oxide (4MePyNO), 3-cyanopyridine N-oxide (3CNPyNO), 4-cyanopyridine N-oxide (4CNPyNO), 3-hydroxypyridine N-oxide (3OHPyNO), 2-pyridin...
Poly(sulfonyldiphenylene phenylphosphonate) (PSPPP) alone or together with polyphenylene oxide PPO, triphenylphosphate TPP or 2-methyl-1,2-oxaphospholan-5-one 2-oxide (OP) was mixed with poly(butylene terephthalate) (PBT). The combustion behavior of the formulations was studied by limiting oxyge...
Carbonated and non-carbonated mineral water samples bottled in 0.5-L, 1.5-L and 2.0-L polyethylene terephthalate (PET) containers belonging to three different water brands commercialized in Hungary were studied in order to determine their phthalate content by gas chromatography–mass spectrometr...
The thermal decomposition behavior of 1,4-diisobutyl-2,3,5,6-tetrahydroxy-1,4-diphosphorinane 1,4-dioxide (Cyagard), a fire retardant additive, was studied by thermogravimetry, differential scanning calorimetry, FT-IR and GC/MS. Cyagard decomposes vigorously exhibiting a strong sharp-exothermic ...
Phthalate esters are found in a wide variety of consumer and food packing products. Hence there is widespread exposure of the human population to these chemicals. Some of the phthalate esters are known to be toxic to the developing male reproductive system. This paper derives a reference dose (R...
The reactions of O−.2 with alkyl and aryl esters of benzenedicarboxylic acids have been studied under negative-ion chemical ionization (NICI) conditions via a conventional chemical ionization source. Reaction mechanisms have been elucidated by using ion isolation techniques on a Fourier transfor...
We examined the effects of actarit, a new antirheumatic drug, on antibody production after LPS stimulation in mice. Actarit did not affect the proliferative response of B-cells stimulated with LPS or anti-mouse μ-chain antibody plus rIL-4. Lymphocytes in the Peyer's patches (PP) of mice wi...
To elucidate the efficacy of 4-acetylaminophenylacetic acid (actarit), an anti-rheumatic drug, on neuroinflammatory diseases such as multiple sclerosis, the effects of actarit on both actively induced and adoptively transferred experimental autoimmune encephalomyelitis (EAE) were studied. Daily ...
This work systematically studied the intravenous injection formulation of solid lipid nanoparticles (SLNs) loaded with actarit, a poor water soluble anti-rheumatic drug. The goal of this study was to design passive targeting nanoparticles which could improve therapeutic efficacy and reduce side-...
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