Joanna Cybinska

Joanna Cybinska
University of Wroclaw | WROC · Department of Analytical Chemistry

About

96
Publications
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1,557
Citations
Citations since 2017
26 Research Items
864 Citations
2017201820192020202120222023050100150
2017201820192020202120222023050100150
2017201820192020202120222023050100150
2017201820192020202120222023050100150

Publications

Publications (96)
Article
Full-text available
The sol-gel technology allows for the development of materials for nonlinear optics and photonics through the synthesis of multifunctional ceramic materials. Although the nature of the amorphous matrix allows the material to be doped with a large amount of the active components without quenching, it may affect the spectroscopic characteristics of t...
Article
A logic construction of monomeric subunits armed with the functionality open for post-synthetic reactivity leads to a convergent formation of pi-extended defected units. The kinetic or thermodynamic control entraps either...
Article
Full-text available
In this study, we demonstrate six novel xanthene derivatives and their spectroscopic and chemical properties. The presented synthesis examination allowed us to obtain two different compounds during one step, with open and closed lactone rings substituted with different length alkyl chains. Increasing the reaction efficiency to 77% was obtained usin...
Article
Full-text available
A family of tunable halochromic switches is developed using a naphthalimide‐fused dipyrrin as the core π‐conjugated motif. Electronic properties of these dipyrrins are tuned by substitution of their alpha and meso positions with aryl groups of variable donor–acceptor strength. The first protonation results in a conformational change that enhances e...
Article
Peripheral substitution of a π‐extended porphyrin with bulky groups produces a curved chromophore with four helical stereogenic units. The curvature and stereochemistry of such porphyrins can be controlled by varying the substituents, coordinated metal ions, and apical ligands. In particular, when the achiral saddle‐shaped free bases are treated wi...
Article
Full-text available
Peripheral substitution of a π‐extended porphyrin with bulky groups produces a curved chromophore with four helical stereogenic units. The curvature and stereochemistry of such porphyrins can be controlled by varying the substituents, coordinated metal ions, and apical ligands. In particular, when the achiral saddle‐shaped free bases are treated wi...
Article
LuPO4 in the form of nano-powders can find potential application in bio-imaging and luminescence thermometry. To enable development of functional materials there is a need to acquire basic information about the effect of morphology and grain size on spectroscopic properties. So, we investigated a series of Nd³⁺-doped LuPO4 nanoparticles prepared wi...
Article
Full-text available
This paper presents a comparison of the simultaneous preparation of di-O-alkylated and ether–ester derivatives of fluorescein using different methods (conventional or microwave heating). Shortening of the reaction time and increased efficiency were observed when using a microwave reactor. Moreover, described here for the first time is the applicati...
Article
Full-text available
Mixtures of nematic liquid crystals (LCs) with chiral ionic liquids (CILs) may find application as active materials for electrically driven broadband mirrors. Five nematic liquid crystal hosts were mixed with twenty three ionic liquids, including chiral ones, and studied in terms of their miscibility within the nematic phase. Phase diagrams of the...
Article
The high-energy electrons can induce significant physicochemical changes in ionic liquids (ILs), of which polymerization and solidification are particularly interesting due to potential application in microstructures fabrication using electron beam (EB) patterning. However, the role of allyl and alkyl substituents of cation in these phenomena is no...
Article
We report a detailed analysis of both structural characterization and high-resolution spectroscopic properties of Nd³⁺-doped YPO4 and LuPO4 in the form of nano/micro powders. LuPO4, like YPO4 crystalizes in a zircon-type tetragonal system. Nd³⁺ ion in substitution of Lu³⁺ or Y³⁺ cations occupies the main symmetry site D2d and the presence of additi...
Article
The presence of heteroatom at the meso-position of BODIPY significantly influence the pi-cloud of the main chromophore modifying the final optical properties. The origins of heteroatom have been made for amino acid chains where specific location of nitrogen, sulfur or oxygen opened a possibility of formation of a family of specific derivatives. The...
Article
We present and discuss the structural and spectroscopic properties of micro-crystalline Nd³⁺-doped LuPO4 zircon-(xenotime)-type orthophosphates (0.5–20 mol% of Nd³⁺ ions) synthesized by high-temperature solid-state reaction, in which Nd³⁺ optical rare earth ion plays the role of a structural probe. Surprisingly, in the literature there are not many...
Article
Planar photonic components can be fabricated with high resolution by electron beam patterning of polymer thin films on solid substrates such as silicon or glass. However, polymer films are normally formed by spin-coating of lithographic resists containing not only polymers but also volatile solvents, which is a serious environmental and health issu...
Article
A meso-nitrogen substituted dipyrromethens (DIPYs) and their boron(III) complexes (BODIPYs) were obtained in the way of nucleophilic aromatic substitution. The following intramolecular fusion with formation of 3H-[2,3-c]quinoline skeleton extends delocalisation, but shifts the absorpation and emission hipsochromically. A further blue shift has been...
Article
Macrocycles built of carbazole and pyridine fragments with alkene/alkane linkers constitute a helical structure as documented structurally and spectroscopically. The 'solid-state' prearrangement observed for two CC bonds leads to unprecedented transformation to a cyclobutane in a head-to-tail (rtct) geometry with two macrocyclic loops in a perpendi...
Article
We report the new fluorescent polymerizable imidazolium-based ionic liquids for photonics application. We investigate two approaches: one ionic liquid (IL) contains the active fluorescein dianion as an intrinsic part of the polymerizable ionic liquid structure. The second liquid is based on the mixture of polymerizable ionic liquid with optically a...
Article
Full-text available
The electron beam patterning is an important technology for fabrication of miniaturized photonic devices. The fabrication process conventionally involves usage of radiation sensitive polymer-based solutions (called resists). We propose to replace typical polymer resists with eco-friendly solvent-free room-temperature ionic liquids (RTILs), which ar...
Article
Photoluminescent properties of nano- and micro-crystalline LuPO4:Ce³⁺ sintered materials were investigated in the temperature range of 20–700 K. It was shown that the nano-powders may be converted into highly translucent layers with good mechanical stability by heat-treatment at 1000 °C. Processing at higher temperatures caused grains growth and fo...
Article
PdII‐mediated annulative double C−H activation is shown to efficiently convert 1,n‐dipyrrolylalkanes into extensively π‐conjugated bipyrroles not accessible via conventional oxidative coupling protocols. This approach is applicable to both electron‐rich and electron‐deficient systems, and has been further developed into tandem processes involving f...
Article
In recent years the challenge is generating highly processed functional materials using minimum amount of 4f precious elements. Henceforth, the efforts are put into elaborating doped polymers, thin films and nanomaterials. The lanthanide chelates can be appropriate co-doping compounds covering the spectrum from blue to infrared. Moreover, compounds...
Article
Formation of gratings upon alternating electric field in compositions of highly birefringent liquid crystal (LC) with novel chiral ionic liquid (CIL) enclosed in 10-µm-thick cells is studied. The compatibility of two organic components of the mixture is investigated. The grating is formed in 1–5% CIL mixtures and causes significant changes of the t...
Article
The studies presented in this paper are devoted to nanoscale lanthanide orthophosphates, LnPO4 (Ln = Y, La, Gd, doped with Eu³⁺ and Ln= Pr³⁺, Nd³⁺, Sm³⁺, Eu³⁺, Tb³⁺, and Dy³⁺). All materials were synthesized in phosphate ionic liquids with the ionic liquid acting not only as reaction medium and morphology controlling agent but also as the reaction...
Patent
Full-text available
Przedmiotem wynalazku jest zastosowanie chiralnych cieczy jonowych zawierających pochodną optycznie czynnego mentolu i anion sacharynianowy o wzorze ogólnym [ImRMentol]+Sach-, w którym, R oznacza grupę alkilową CnH2n+1, gdzie n wynosi 1-12 jako materiałów luminescencyjnych.
Article
Phosphor materials based on the orthophosphates have been widely investigated in the past as crystals, bulk, or nanomaterials. These non-hydroscopic matrices are able to accommodate high concentrations of lanthanide ions without suffering of concentration quenching of the luminescence. One of the most important issue, which is necessary to overcome...
Article
Monoclinic monazite-type Nd³⁺-doped lanthanum orthophosphate (LaPO4:Nd³⁺) nanoparticles were prepared by microwave treatment of simple lanthanide precursors such as Nd(OAc)3•xH2O, OAc = acetate) with task-specific dihydrogen phosphate ionic liquids (ILs) 1-butyl-1-methylpyrrolidinium dihydrogenphosphate- BmPyrH2PO4 (IL1) and 2-hydroxyethyl-N,N,N-tr...
Article
Octulene, the higher homologue of kekulene and septulene, was synthesized using the fold-in method. This new hydrocarbon macrocycle contains a large 24-membered inner circuit, which is peripherally fused to 24 benzene rings. Such an arrangement produces considerable hyperbolic distortion of the π-conjugated surface. The consequences of distortion i...
Article
Octulene, the higher homologue of kekulene and septulene, was synthesized using the fold-in method. This new hydrocarbon macrocycle contains a large 24-membered inner circuit, which is peripherally fused to 24 benzene rings. Such an arrangement produces considerable hyperbolic distortion of the π-conjugated surface. The consequences of distortion i...
Article
A hexapyrrolohexaazacoronene derivative containing 37 fused rings, the largest such system to date, was obtained from a naphthalenomonoimide–pyrrole hybrid in a concise and efficient synthesis. This large heterocycle is electron-deficient and shows extended redox activity, spanning at least 13 oxidation levels, but is otherwise chemically stable. R...
Article
A hexapyrrolohexaazacoronene derivative containing 37 fused rings, the largest such system to date, was obtained from a naphthalenomonoimide–pyrrole hybrid in a concise and efficient synthesis. This large heterocycle is electron-deficient and shows extended redox activity, spanning at least 13 oxidation levels, but is otherwise chemically stable. R...
Article
Among a wide variety of solid state materials lanthanide beta-diketonates, their derivatives and polymeric materials based on them have become essential for advance technologies. Thus they are the subject of extensive spectroscopic studies. Using appropriate lanthanide chelates for the emission layer one can achieve electroluminescence covering the...
Article
A family of bandgap-tunable pyrroles structurally related to rylene dyes was computationally designed and prepared using robust, easily scalable chemistry. These pyrroles show highly variable fluorescence properties and can be used as building blocks for the synthesis of electron-deficient oligopyrroles. The latter application is demonstrated throu...
Article
Review: [discussion of the properties of the broad-band luminescence around 425 nm in the temp.
Article
Full-text available
Properties of SrS:Ce and LuPO4:Eu sintered ceramics are reported for the first time. Both materials were sintered at various temperatures up to 1700°C. SrS:Ce sintered ceramics were found to form a new luminescent center(s) giving emission with maximum around 620 nm or 700 nm for 0.05% Ce and 5% Ce, respectively. This red-infrared band was continuo...
Article
Nanocrystalline powders of LuPO4:Eu were prepared at 230 °C by a hydrothermal method. Their post-treatment at 900, 1200 and 1350 °C induced a moderate grain growth from ∼20-50 nm up to 80-300 nm. These powders were sintered at 1700 °C and such LuPO4:Eu materials, despite the regular Eu3+ emission, produced a broad-band luminescence peaking at aroun...
Article
A blue-green luminescence of SrS:Ce has been known for years. High-density sintered pellets of SrS:Ce were prepared for the first time and their unique spectroscopic properties are reported. A new luminescence band appearing in red and infrared part of spectrum and having all the characteristics of Ce3+ emission was obtained after sintering SrS:Ce...
Article
Full-text available
A heteroaromatic nanographene containing a unique assembly of five-, six- and seven-membered rings is synthesized using oxidative coupling of an indole-containing precursor. Near-infrared absorption and emission properties of the nanographene core are enhanced by peripheral expansion and ring fusion at all oxidation levels. The dicationic state sho...
Article
Two coronoid hydrocarbons, [3]- and [4]chrysaorene were synthesized from fluorenophane precursors using the fold-in strategy. [3]Chrysaorene is a bowl-shaped fragment of the C240-Ih fullerene, whereas [4]chrysaorene is planar and contains a unique large 24-membered internal ring. The chrysaorenes show geometry-dependent magnetic properties and are...
Conference Paper
We present some approaches for modulation of light by hybrid liquid crystal materials. Mixtures of liquid crystals with chiral ionic liquids are used for modulating the incident light amplitude by alternative electric field. Hybrid cells of liquid crystals with inner surfaces, being modified by metallic and semiconductor nanoparticles, are used for...
Article
Characterization of size of synthesized semiconductor copper indium sulphide (CuInS2) nanoparticles used for doping liquid crystal E7 is presented. The method of production of uniform dispersions of the nanoparticles in liquid crystals avoiding aggregation of the nanoparticles is discussed. It was possible to prepare doped liquid crystal with almos...
Article
Ln3+-doped (Ln=Sm, Eu, Tb, Dy) nanoparticles of BiPO4 with a particle size below 10 nm were synthesized in a straightforward manner from the appropriate mixture of the respective metal acetates and the task-specific ionic liquids choline or butylammonium dihydrogen-phosphate by conversion in a laboratory microwave (120 °C, 10 min). The ionic liquid...
Article
The studies presented in this paper were devoted to optimizing the synthesis conditions of nanoscale YPO4 doped with optically active lanthanide ions (Eu3+). In frame of this work the structural, morphological and spectroscopic investigation of the fabricated powders were performed. The materials were synthesized in phosphate ionic liquid as precip...
Article
Sonication of Ln(CH3COO)3.H2O, Eu(CH3COO)3·H2O and NaOH dissolved in the ionic liquid -butyl-3-methylimidazolium bis(trifluoromethane)sulfonylamide lead to Ln(OH)3:Eu (Ln: Gd, La, Y) nanoparticles. Subsequent calcination at 800 °C for 3 h allowed to obtain Ln2O3:Eu nanopowders. Gd2O3 and Y2O3 were obtained in the C-type lanthanide sequioxide struct...
Article
Full-text available
Alkaline earth fluorides are extraordinarily promising host matrices for phosphor materials with regard to rare earth doping. In particular, quantum cutting materials, which might considerably enhance the efficiency of mercury-free fluorescent lamps or SC solar cells, are often based on rare earth containing crystalline fluorides such as NaGdF4, Gd...
Article
High quantum yields of up to 40.5 % can be achieved in salicylate-bearing ionic liquids. A range of these ionic liquids have been synthesized and their photoluminescent properties studied in detail. The differences noted can be related back to the structure of the ionic liquid cation and possible interionic interactions. It is found that shifts of...
Article
For the first time, it has been realized that trigonal GdF3:Eu, which is usually only accessible at high temperatures and very high pressures, has a superior capability as a host material for quantum-cutting materials compared to orthorhombic phase GdF3:Eu. Synthesis of these materials from ionic liquids does not only allow us to obtain oxygen-free...
Article
Two ternary yttrium(III) oxomolybdates(VI) are investigated, both structurally and spectroscopically. The crystal structure of Y2[MoO4]3 was solved at room temperature in the orthorhombic space group Pba2 (a = 1030.21(3), b = 1032.41(3), c = 1057.25(3) pm, Z = 4). In the unit cell, three discrete ortho-oxomolybdate(VI) units [MoO4]2− and two Y3+ ca...
Article
A multifunctional polymerizable ionic liquid, diallyldimethylammonium tetrafluoroborate (DADMA BF4), is used in a one-pot synthesis of novel luminescent polymer-nanoparticle composites. First, small monodisperse lanthanide fluoride nanoparticles are formed by microwave irradiation in the presence of Ln(OAc)3·xH2O (Ln = Gd, Eu, Tb; OAc = acetate) in...
Article
Full-text available
A fast and easy 2-in-1 step microwave reaction procedure to phosphate coated nanofluorides allows for the formation of phosphate protected fluoride nanoparticles from simple lanthanide precursors in ionic liquids. The phosphate shell efficiently prevents the fluoride particle from decomposition in an atmosphere (containing oxygen and water) at elev...
Article
By slow diffusion of triethylamine into a solution of 2,3,5,6-tetrafluoroterephthalic acid (H2tfBDC) and the respective lanthanide salt in EtOH/DMF single crystals of seven nonporous coordination polymers, (∞)(2)[Ln(tfBDC)(NO(3))(DMF)(2)]·DMF (Ln(3+) = Ce, Pr, Nd, Sm, Dy, Er, Yb; C2/c, Z = 8) have been obtained. In the crystal structures, two-dimen...
Article
Bulk alkaline earth fluorides co-doped with optically active ions are prominent materials for luminescent applications. However, for phosphor materials the changeover to the nanoscale is a tightrope walk between achieving desirable features of small particles such as reduced light scattering and unwanted drawbacks such as a high surface defect conc...
Article
In the framework of systematic investigations of the optical properties of a new tungstate ZnY4W3O16 in which Y3+ cations allow for rare-earth ions doping, the compounds doped with neodymium Nd3+ ion were synthesized, analyzed and considered as a possible laser material. The crystalline stoichiometric sample of the chemical formula ZnNd4W3O16 and t...
Article
Studies of the absorption and temperature dependence of photoluminescence spectra and luminescence decay times of the intra-shell f–f transitions (2F5/2 ↔ 2F7/2) of Yb3+ ions in K2LaCl5:Yb3+ powders with 5, 10, 15 and 25% of ytterbium are presented. The spectroscopic properties of the powders with different ytterbium content are compared. Experimen...
Article
Endless Phossibilities: Microwave synthesis, with phosphate ionic liquids acting as reaction partner, solvent, and in-situ stabilizer all-in-one, allows for a fast, facile, and mild access to nanometer-sized orange–red emitting phosphors. The phosphors show excellent photophysical performance.
Article
Inorganic luminescent materials (phosphors) find widespread scientific and industrial applications. For potential applications, nanoscale phosphors are favored because of the reduced scattering and the possibility to miniaturize devices. In such materials, the optical behavior is strongly dependent on impurities or defects in the crystal lattice, s...
Article
The luminescent complexes of triphenylphosphine and two interesting aminomethylphosphines: P(CH(2)N(CH(2)CH(2))(2)NCH(3))(3) and P(CH(2)N(CH(2)CH(2))(2)O)(3) with copper(I) iodide and 2,9-dimethyl-1,10-phenanthroline (dmp): [CuI(dmp)PPh(3)], [CuI(dmp)P(CH(2)N(CH(2)CH(2))(2)NCH(3))(3)] and [CuI(phen)P(CH(2)N(CH(2)CH(2))(2)O)(3)] are presented in thi...
Article
Novel red-emitting phosphors scheelite-like tungstates of the formula Cd0.25Eu0.50□0.25WO4 and Cd0.25Gd0.50□0.25WO4:Eu3+ doped phases with a wide concentration range of the Eu3+ ion (0.5, 1, 5, 10 mol%) were prepared. Their photoluminescence properties under ultraviolet–visible (UV) as well as under vacuum-ultraviolet–visible (VUV) excitation were...
Article
Physical vapour deposition into ionic liquids allows for the first time the synthesis of a reduced lanthanide halide on the nanoscale. The obtained EuF(2) nanoparticles show a bright blue luminescence and form long-time stable-colloidal solutions in the ionic liquids.
Article
Full-text available
Microwave reaction of Ln(OAc)(3).xH(2)O, Ln = Gd, Eu; OAc = acetate) with and in the ionic liquid [C(4)mim][BF(4)] (C(4)mim = 1-butyl-3-methylimidazolium) allows the fast and efficient synthesis of small, uniform, oxygen-free lanthanide nanofluorides with excellent photophysical behaviour. For GdF(3) : Eu(3+) nanoparticles a quantum efficiency of u...
Article
A new Zn and Eu tungstate was characterized by spectroscopic techniques. This tungstate, of the formula ZnEu4W3O16, crystallized in the orthorhombic system and was synthesized by a solid-state reaction. It melts incongruently at 1330°. The luminescent properties, including excitation and emission processes, luminescent dynamics, and local environme...
Article
Two new Eu-based ionic liquid systems, [C4mim][DTSA] : [Eu(DTSA)3] and 2[C4mim] [DTSA] : [Eu(DTSA)3] were synthesized at 120° under inert conditions from 1-butyl-1-methylimidazolium ditoluenesulfonylamide ([C4mim][DTSA]). The identity and purity of the synthesized compounds were confirmed by elemental analysis, IR, Raman, and 1H-NMR spectroscopy. A...
Article
Structure and optical properties of Eu3+ and Gd3+ in sodium double phosphates were studied. Emission spectra were measured under VUV/UV excitation at room and low temperatures. Structural differences in various kinds of sodium double phosphate matrices are manifested in their optical behaviors. Under synchrotron radiation, Na3Gd(PO4)2 exhibits the...
Article
The spectroscopic properties of praseodymium and ytterbium-doped ternary halides of K2(La,Ln)X5 (X = Cl−, Br−) type and ytterbium-doped double phosphates of formula A3Lu(PO4)2 (A = an alkali metal: Na, Rb) were presented. Absorption, emission and luminescence excitation spectra were measured at 4, 10 and 293 K in the wide spectral range (VUV–IR). L...
Article
In this paper we present a comparative optical study of praseodymium and praseodymium/ytterbium-doped lutetium double phosphates in the wide spectral range (VUV-IR) and for various concentrations of the activators. The absorption and emission spectra of Na(3)Lu(PO(4))(2):Pr(3+) and Na(3)Lu(PO(4))(2):Pr(3+), Yb(3+) were measured at room and low temp...
Article
A series of potassium lanthanum praseodymium ternary bromides, K2La1−xPrxBr5 (0.02 ≤ x ≤ 1) single crystals was grown by the Bridgman technique. The high resolution absorption, luminescence and excitation spectra were measured at 4, 77 and 293 K under different excitation sources, including VUV synchrotron radiation. The Stark components determined...
Article
The sol-gel process was used to prepare amorphous di-amide cross-linked alkyl/siloxane hybrid materials (di-amidosils) incorporating europium triflate (Eu(CF3SO3)(3)). Samples with 200 <= n <= 8 (where n is the molar ratio of carbonyl oxygen atoms per Eu3+ ion) were studied. The conformations of the alkyl chains of the host matrix in the doped di-a...
Article
A new example of dimeric complex of europium β-diketones with α,α′ dipyridine-Lewis base ligand, trifluoroacetate and acetates of formula C76H48Eu4F36N8O24 was obtained. The high resolution emission and emission excitation spectra at 293 and 4K, as well as luminescence decay time measurements were used to characterize the title compound in the soli...
Article
The aim of this work is comparison of the spectroscopic behaviour of two europium compounds with the formula Eu(TAN)3dipy (1) and Eu(TAN)3phen (2) where TAN=4,4,4-trifluoro-1-(2-naphthyl)-1,3-butanedionate, dipy=2,2′dipyridine and phen=1,10 phenathroline). The synthesized single crystals of the complexes were investigated by the high-resolution pho...
Article
The new type of Sm3+ chelates LnPhβ3L with orange emission obtained as single crystals as well as incorporated into zirconia-glymo films can find application in electro-luminescent diodes. Absorption, emission and emission excitation spectra at 293, 77 and 4K, as well as luminescence decay time measurements with different energy of the excitation l...
Article
This work is devoted to spectroscopic study of Pr3+ ion in sodium double phosphate matrices. Absorption, reflection, emission and emission excitation spectra of praseodymium-doped and praseodymium/ytterbium-co-doped systems were measured at room and low temperature. The intensities of the electronic transitions for diluted systems were analyzed and...
Article
The purpose of this paper is investigation of the spectroscopic properties of Pr3+ and Yb3+/Pr3+ co-doped ternary lanthanum halides hosts in the form of powders and correlation of their optical behaviour with the appropriate crystals grown by the Bridgman method. Spectroscopic measurements relevant to laser applications, high resolution absorption...
Article
A series of crystals of ternary lanthanide halides K2LaX5 (X = Cl,Br,I) doped with Pr3+ were synthesized, crystals grown using the Bridgman method, and their optical properties were studied. Apart from fundamental Pr3+ emission, up-conversion emission was detected in these crystals. Some features in the up-conversion fluorescence vary in the series...
Article
A series of potassium lanthanum praseodymium ternary chlorides, K2La1−xPrxCl5, (0.02 ⩽ x ⩽ 0.15) single crystals was grown with Bridgman techniques. The structures of the mixed crystals were found isotypic with that of K2PrCl5 and K2LaCl5. The high resolution absorption, luminescence and excitation spectra were recorded at 4, 77 and 293 K. Broad ba...
Article
The potassium lanthanum ternary halides are appropriate host lattices for various luminescent materials including laser devices. The lanthanum ternary halide lattice, co-doped by different lanthanide ions, can exhibit up-conversion emission in a wide spectral range from blue to red. For this purpose (Pr3+) and (Yb3+) ions and also co-doping by othe...
Article
Novel amide cross-linked alkylene–siloxane hybrid materials (di-amidosils) synthesized by the sol–gel process have been investigated. Two samples identified by the notation d-A(x) with x = 4 and 8 (where x is the number of methylene groups of the alkylene chain) have been produced as transparent, amorphous, rigid monoliths. The d-A(8) material is t...
Article
The high resolution absorption, luminescence and excitation spectra of the orthorhombic potassium lanthanum praseodymium ternary chloride, K2La1−xPrxCl5, (0.02 ≤ x ≤ 0.15) single crystals were recorded at 4, 77 and 293 K with different excitation sources. The experimental 4f2 energy level scheme of the Pr3+ ion in K2LaCl5 derived from the absorptio...
Article
The high resolution absorption, luminescence and excitation spectra of the orthorhombic potassium lanthanum praseodymium ternary chloride, K2La1−xPrxCl5, (0.02 ≤ x ≤ 0.15) single crystals were recorded at 4, 77 and 293K with different excitation sources. The experimental 4f2 energy level scheme of the Pr3+ ion in K2LaCl5 derived from the absorption...
Article
In the present work, the spectroscopic and magnetic properties of heteronuclear Cu:Pr squarate are reported. Single crystals of [Pr2Cu(C4O4)4(H2O)16]·2H2O were obtained by reaction of squaric acid, praseodymium chloride and copper chloride in water solution according to the procedure described earlier. The crystals of title compound are isomorphic...
Article
The monocrystals of ternary praseodymium bromides were obtained by Bridgman technique. The high resolution absorption emission and emission excitation spectra were studied in the UV, VIS and near-infrared regions at 293, 77 and 4 K. In these spectral regions the 4f–5d and f–f Pr(III) transitions were observed, and the splitting of the corresponding...
Article
Full-text available
A series of lanthanide compounds of type Ln(NCS)(HMPA)4,(μ-SCN)2HgCl(SCN) (Ln = Pr, Nd, Eu) were synthesized and grown in the form of single crystals.The crystal structure of the neodymium complex was determined by X-ray diffraction. Its space group is Cc, with the following unit cell parameters; a = 17.338(3) Å, b = 15.795(3) Å, c = 21.828(4) Å, β...
Article
The optical and magnetic properties of K2PrCl5 were investigated in the 1.7–293 K temperature range and are discussed on the basis of the X-ray crystal structure data. High-resolution absorption, emission, and excitation spectra as well as decay time measurements at 293, 77, and 4 K are presented and used to characterize the excited state photophys...
Article
Lanthanide β-diketones were used recently in organic-layered electroluminescence diodes and can also find other optical applications. An important characteristic of these materials can be correlated with donor–acceptor properties of the substituents in ligands. Single crystals of C35H21EuF18N4O7 were obtained. The X-ray diffraction analysis shows t...
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