Materials Literature
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Two series of solid solutions based on the [Fe(bpp)2][BF4]2 (bpp = 2,6-di(pyrazol-1-yl)pyridine) spin-crossover lattice are described. Materials of formula [FeyNi1−y(bpp)2][BF4]2 (0.95 ≥ x ≥ 0.15) are all phase-pure. In contrast, [Fe(bpp)2]x[Ru(terpy)2]1−x[BF4]2 (0.95 ≥ x ≥ 0.28) crystallise as a mixture of the neat […
A combined experimental and theoretical investigation has clarified the nanometre-scale vapour-phase epitaxial growth of ZnO nanostructures on different crystal planes of GaN substrates. Under typical growth conditions, ZnO nanorods grow perpendicular to the GaN(0001) plane, but thin flat films form on GaN(101), (100)…
New D2d octupolar organic chromophores based on bipyrimidine as a strong acceptor group exhibit strong fluorescence, fluorosolvatochromism and large second-order nonlinear optical responses.
A chemical sensor for mercury(II) (Hg(II)) was developed based on the quenching of the fluorescence of cadmium sulfide (CdS) quantum dots (QDs) coated with polypropylenimine tetrahexacontaamine dendrimer (DAB) generation 5, CdS-DAB nanocomposites. The synthesis and characterization of CdS-DAB nanocomposites by means o…
The absorption and self-assembly of a dithiocarbamate calix[4]arene derivative (DTCX) on Ag nanoparticles (NPs) was characterized in this work by surface-enhanced Raman scattering (SERS). This study was carried out on Ag NPs prepared by chemical reduction of silver nitrate with two different reducing agents: sodium ci…
We have studied the structural and electrical properties of Mg2TiO4 inverse spinel using X-ray diffraction, Raman spectroscopy, ac conductivity and dielectric spectroscopy. Polycrystalline sample of Mg2TiO4 was prepared by the conventional solid state reaction technique. Powder X-ray diffraction analysis indicates sin…
By means of Molecular Dynamic simulations we study over a wide range of temperature (200–400 K) the static and dynamics of polyaminoamide bulk dendrimers of third (16 end-groups) and fourth (32 end-groups) generations. The simulations show a very weak effect of the temperature on all the static properties analyzed (gy…
The treatment of 3,5-dibenzoylporphyrins with ammonium acetate provided novel oxopyridochlorins as the first examples of pyridine-fused porphyrinoids, which displayed absorption bands reaching into the near IR region and an ability to sensitize singlet oxygen effectively.
A series of novel organic-inorganic assemblies, {Ag(3)(2,2'-bipy)(2)(4,4'-bipy)(2)}{Ag(2,2'-bipy)(2)}{Ag(2,2'-bipy)}[AlW(12)O(40)].H(2)O (), [Ag(phen)(2)](3)[Ag(phen)(3)][AlW(12)O(40)].H(5)O(2) () and {Co(2,2'-bipy)(3)}(3){Co(H(2)O)(2,2'-bipy)(2)[AlW(12)O(40)]}(2).H(2)O () (2,2'-bipy = 2,2'-bipyridine, 4,4'-bipy = 4,4…
The baricenter and crystal field splitting of the 5d transition of the activator were approximated from the experimental spectrum data for , , and hosts and examined in conjunction with the ionic radii of neighboring alkali earth ions and the local structure around the divalent europium activator. In addition, ternary…
The effect of at the parts per million level on the early stage of iron corrosion in 3 wt % NaCl solutions saturated with is investigated using electrochemical and surface science techniques. Small concentrations (5 ppm) have an inhibiting effect on corrosion in the presence of . At higher concentrations (up to 500 pp…
Precipitates in an Mg-0.99 at%Sm (Mg99.01Sm0.99) alloy aged at 200°C were studied by the combination of high-resolution transmission electron microscopy (HRTEM) and high-angle annular detector dark-field scanning transmission electron microscopy (HAADF-STEM). Fine precipitates of a meta-stable phase, which is called γ…
A series of magnesium complexes have been prepared and characterized, in which [(EDBP-Me)Mg(mu-OBn)](2) (4) has shown high activity toward the ring-opening polymerization (ROP) of epsilon-caprolactone and L-lactide. 2,2'-Ethylidene-bis(4,6-di-tert-butylphenol)-monomethyl ether ([EDBP-(Me)H]) is prepared by the reactio…
The semiconducting properties of molecular material prototypes for graphene nanoribbons are rationalized by quantum-chemical calculations. The present contribution focuses on the hole transport properties of circum(oligo)acenes and compares the intrinsic efficiency of these materials for charge transport in the hoppin…
A dual-band bandpass filter is presented. The filter is composed of generalized negative-refractive-index transmission-lines (NRI-TL) realized in microstrip. The filtering mechanism relies on all four of the generalized NRI-TLs' left-handed and right-handed passbands. Under the closed stopband condition, two passbands…
The development of effective methods for predicting the quality of three-dimensional (3D) models is fundamentally important for the success of tertiary structure (TS) prediction strategies. Since CASP7, the Quality Assessment (QA) category has existed to gauge the ability of various model quality assessment programs (…
Compound [Co(4-terpyridone)2](CF3SO3)2·1H2O, where 4-terpyridone is 2,6-bis(2-pyridyl)-4(1H)-pyridone, forms two polymorphs. Polymorph 1 displays a continuous spin conversion in the temperature region 300–120 K while polymorph 2 shows, on cooling, the onset of a continuous high-spin (HS) to low-spin (LS) conversion in…
Heparin is involved in the pathogenesis of prion diseases, affecting the process of fibril formation. It has been shown that whether it accelerates or inhibits fibrilogenesis depends on its concentration: prion peptide PrP 185-208 aggregates in the presence of 0.04 mg ml−1 heparin, but concentrations ten times lower o…
A simple recycling and reuse hydrothermal route has been applied to prepare ZnO nanorod arrays, nanoribbon bundles, nanosheets, nanocubes and nanoparticles.
Two-photon excited (TPE) calcium fluorescent probes are designed and synthesized based on internal charge transfer (ICT) with high Ca(2+) affinity and large two-photon action cross section, which can be used in living cells and detected with two-photon microscopy (TPM).