Near-infrared luminescent and magnetic cyano-bridged coordination polymers Nd(phen)(n)(DMF)(m)[M(CN)(8)] (M = Mo, W)

New cyano-bridged coordination polymers [Nd(phen)(2)(DMF)(2)(H(2)O)Mo(CN)(8)] center dot 2H(2)O (1) and [Nd(phen)(DMF)(5)M(CN)(8)] center dot xH(2)O [M = Mo (2), W (3); phen = 1,10-phenanthroline] have one-dimensional structures with variable number of phenanthroline ligands. Compounds exhibit photoluminescence in the near-infrared region and ferromagnetic Nd(3+)-M(5+) interactions

Converter Structure of Time-and-Frequency Signals Parameters into Code of Two Variables on the Radial-Based Networks Basis

Reasons for radial-based network application for converters creation of time-and-frequency signals parameters of two variables are given. Converter structure of time-and-frequency signals parameters into digital code of two variables on the radial-based networks basis is constructed. The converter decomposition on two components in which the second component is a radial-based network is offered. The network training example of the frequency converter in a position code of two variables is given

Hydro-ionothermal synthesis of lanthanide-organic frameworks with 1,4-phenylenebis(methylene)diphosphonate

A synthetic approach combining hydrothermal and ionothermal (eutectic mixture of choline chloride and malonic acid) procedures is proposed that allowed the isolation of the first lanthanide-organic frameworks with residues of 1,4-phenylenebis(methylene)- diphosphonic acid (H4pmd), [Ln(Hpmd)(H2O)] (where Ln3+ ) Ce3+ and Pr3+), exhibiting an unprecedented trinodal topology with 3- and 8-connected nodes. The structural details were unveiled from single-crystal X-ray diffraction and the materials were characterized using standard techniques.FCT - POCI-PPCDT/QUI/58377/2004FEDER - POCIGrant - SFRH/BPD/9309/200

Tetra­aqua­tetra­kis­(4,4′-bipyridine dioxide-κO)terbium(III) octa­cyanido­molybdate(V)

In the title compound, [Tb(C10H8N2O2)4(H2O)4][Mo(CN)8], both metal atoms are eight-coordinated. The TbIII atom displays a dodecahedral geometry, while the MoV ion exhibits a distorted square-anti­prismatic geometry. The Tb atoms are located on a special position of site symmetry , whereas the Mo atoms are located on a twofold rotation axis. The cations are linked by O—H⋯O hydrogen bonds

Three-dimensional lanthanide-organic frameworks based on di-, tetra-, and hexameric clusters

Three-dimensional lanthanide-organic frameworks formulated as (CH3)2NH2[Ln(pydc)2] · 1/2H2O [Ln3+ ) Eu3+ (1a) or Er3+ (1b); pydc2- corresponds to the diprotonated residue of 2,5-pyridinedicarboxylic acid (H2pydc)], [Er4(OH)4(pydc)4(H2O)3] ·H2O (2), and [PrIII 2PrIV 1.25O(OH)3(pydc)3] (3) have been isolated from typical solvothermal (1a and 1b in N,N-dimethylformamide - DMF) and hydrothermal (2 and 3) syntheses. Materials were characterized in the solid state using single-crystal X-ray diffraction, thermogravimetric analysis, vibrational spectroscopy (FT-IR and FT-Raman), electron microscopy, and CHN elemental analysis. While synthesis in DMF promotes the formation of centrosymmetric dimeric units, which act as building blocks in the construction of anionic ∞ 3{[Ln(pydc)2]-} frameworks having the channels filled by the charge-balancing (CH3)2NH2 + cations generated in situ by the solvolysis of DMF, the use of water as the solvent medium promotes clustering of the lanthanide centers: structures of 2 and 3 contain instead tetrameric [Er4(μ3-OH)4]8+ and hexameric |Pr6(μ3-O)2(μ3-OH)6| clusters which act as the building blocks of the networks, and are bridged by the H2-xpydcx- residues. It is demonstrated that this modular approach is reflected in the topological nature of the materials inducing 4-, 8-, and 14-connected uninodal networks (the nodes being the centers of gravity of the clusters) with topologies identical to those of diamond (family 1), and framework types bct (for 2) and bcu-x (for 3), respectively. The thermogravimetric studies of compound 3 further reveal a significant weight increase between ambient temperature and 450 °C with this being correlated with the uptake of oxygen from the surrounding environment by the praseodymium oxide inorganic core

MOF materials as therapeutic agents, drug carriers, imaging agents and biosensors in cancer biomedicine:Recent advances and perspectives

We summarize recent advances in application of MOFs as therapeutic agents, drug carriers, imaging agents and biosensors in cancer biomedicine. A holistic perspective is adopted to produce a comprehensive, critical and readable document useful to a broad community in chemistry, material science, medical fields etc. None of the previous articles adopted a holistic approach focusing on a specific disease or area, such as cancer. MOFs have a tremendous potential in cancer diagnostics and treatment. Although a new field, the amount of literature and data accumulated in this area is vast, quickly growing and requires some systematization and processing. We propose a broad overview of MOF-related literature in the treatment and diagnosis of cancer. In our study, we set: (i) to consolidate the most important and up to date information from the field of MOFs applications in medicine, particularly in anticancer therapy; and to reflect these developments in one, comprehensive study, (ii) to highlight new and emerging topics in the field, (iii) to tabulate the large number of the application examples and case studies to make the information more accessible and easy to follow, (iv) and finally, to broadly reflect on the potential of MOFs in application to cancer treatment, including the existing challenges and emerging opportunities.</p

Development of neural network model for signs determination of atrial fibrillation for subsystem of cardiorhythmogram signals processing

Task of the analysis of a cardio rhythm in real time is detection of early arrhythmias for the purpose of their treatment and prevention of life-endangering arrhythmias. In order to solve the problem of classification of heart rhythm features based on cardiorhythmogram processing, an apparatus of artificial neural networks can be used. One of the most dangerous arrhythmias is atrial fibrillation. Therefore, the development of a neural network model for determining atrial fibrillation features, suitable for implementation on the programmable logic basis, for a subsystem for processing cardiorhythmogram signals is an urgent task. Purpose – development of a neural network model for determining atrial fibrillation features for a signal processing subsystem characterized by high reliability and the implementation possibility on the basis of programmable logic. A neural network model for features determining of atrial fibrillation has been developed, characterized by high reliability and insignificant hardware costs when implemented on field programmable gate arrays (FPGA). Program modeling of neural network model for signs determination of atrial fibrillation is performed. A neural network model for characteristics determining of atrial fibrillation on hardware description language VHDL for use in the signal processing subsystem of a cardiorhythmogram based on FPGA was implemented. The findings suggest that the proposed model can be used in the construction of real-time heart rhythm control systems both for monitoring already diagnosed cardiovascular diseases, especially in intensive care wards, and for the prevention and early diagnosis of arrhythmias in individuals at high myocardial risk.</jats:p