454 research outputs found
Synthesis and thermal study of dual coordination compound of gadolinium (III) and chromium (III)
The paper presents experimental data of thermal studies of coordination compound based on gadolinium nitrate with the DSCmethod; the study was performed in the temperature range from 298 to 1273 C. The thermal analysis has several advantages over the other methods: experimental set up flexibility, fast data receive, automatic data processing, small substance amount. The process of thermal decomposition of the received compound was carried out in both inert and oxidizing environments. During the experiment the temperature was defined, above which heating causes decomposition of the investigated substance and weight loss of the sample
Bis(formato-κO)bis[1-(pyridin-2-yl)ethanone oxime-κ2 N,N′]nickel(II)
In the title compound, [Ni(HCOO)2(C7H8N2O)2], the Ni atom is six-coordinated by four N atoms from two oxime ligands and by two O atoms from two formate ions in a distorted octahedral geometry, with the oxime-N atoms mutually trans. The molecular conformation is stabilized by intramolecular O—H⋯O hydrogen bonds
Triethylammonium (indane-1,2,3-trione 1,2-dioximato-κ2 N 1,O 2)(indane-1,2,3-trione 2-oximato 1-oxime-κ2 N 1,O 2)nickel(II)
In the title compound, (C6H16N)[Ni(C9H4N2O3)(C9H5N2O3)], the NiIIion is four-coordinated by two N atoms and two O atoms from two indane-1,2,3-trione-1,2-dioxime ligands. The two organic ligands are linked by an intramolecular O—H⋯O hydrogen bond. In the crystal, molecules are linked by N—H⋯O hydrogen-bonds
Chlorido[1-(pyridin-2-yl)ethanone oximato-κ2 N,N′][1-(2-pyridyl)ethanone oxime-κ2 N,N′]copper(II) trihydrate
In the title compound, [Cu(C7H7N2O)Cl(C7H8N2O)]·3H2O, the metal ion is five-coordinated by the N atoms from the 1-(pyridin-2-yl)ethanone oximate and 1-(pyridin-2-yl)ethanone oxime ligands and by the chloride anion in a distorted square-pyramidal geometry. The distortion parameter is 0.192. The two organic ligands are linked by an intramolecular O—H⋯O hydrogen bond. In the crystal, molecules are linked by O—H⋯O and O—H⋯Cl hydrogen bonds. The title compound is the hydrated form of a previously reported structure [Wu & Wu (2008 ▶). Acta Cryst. E64, m828]. There are only slight variations in the molecular geometries of the two compounds
Лісова політика
У методичних рекомендаціях наведено теоретичні засади та основні поняття лісової політики; принципи, компоненти, цілі, задачі лісової політики; систему інструментів лісової політики; а також методику виконання практичних робіт.Методичні рекомендації упорядковані у співавторстві з колективом кафедри таксації лісу та лісового менеджменту Національного університету біоресурсів і природокористування України (П. Лакида, П. Кравець, О. Павліщук)
Assembly of Near‐Infrared Luminescent Lanthanide Host(Host–Guest) Complexes With a Metallacrown Sandwich Motif
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/87095/1/9834_ftp.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/87095/2/ange_201103851_sm_miscellaneous_information.pd
Tetrabutylammonium 2-[2,5-dimethyl-3-(4-nitrophenyl)-2,3-dihydro-1,2,4-oxadiazolium-4-yl]nonahydro- closo
Effects of Terminal Substitution and Iron Coordination on Antiproliferative Activity of l
Mo-doped TiO2 photoanodes using [Ti4Mo2O8(OEt)10]2 bimetallic oxo cages as a single source precursor
Photoelectrochemical solar water splitting is a promising and sustainable technology for producing solar
fuels such as clean hydrogen from water. A widely studied photoanode semiconductor for this
application is TiO2, but it suffers from a large band gap (3.2 eV) and fast recombination of electrons and
holes. Herein, we present a novel, facile and rapid strategy to develop Mo-doped TiO2 (Mo:TiO2) mixed
anatase–rutile photoanodes using [Ti4Mo2O8(OEt)10]2 bimetallic oxo cages as a single source precursor.
These cages dissolved in tetrahydrofuran deposit by spray pyrolysis at 150 C forming films with
hierarchical porosity on the micrometer and nanometer scale. XPS, EDXS and UV-Vis spectroscopy
reveal Mo atoms evaporate during annealing in air at temperatures 650–800 C, contributing to the
formation of nanostructures and porosity. XPS depth profiling, XRD, EDXS, Raman, and electron
paramagnetic resonance indicate that the remaining Mo atoms are well spread and incorporated in the
TiO2 lattice, at interstitial or substitutional sites of the rutile or anatase phases depending on the
annealing temperature. Photocurrent measurements show that Mo:TiO2 photoanodes optimized at
700 C outperform a TiO2 photoanode prepared in a similar manner by a factor of two at 1.23 VRHE.
Finally, UV-Vis spectroscopy, conduction and valence band calculations, and incident-to-photon
efficiency measurements show these Mo:TiO2 photoanodes possess a narrower band gap than TiO2 and
higher efficiency in the visible light range (5% at 400 nm). These outcomes open a new avenue in the
exploitation of titanium oxo cages and advance the development of photoelectrodes for water splitting
and energy application
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