Inorganics

Living Supramolecular Compounds: Influence of Multiple Hydrogen Bond Connection on Molecular Configuration of Monophosphate or Pyrophosphate Thiamine with Anions or Coordination Anions
Three supramolecular compounds with monophosphate or pyrophosphate esters of thiamine, namely, [TPPH+·CF3SO3·H2O] (1), [TMPH+·(CdCl4)0.5·2H2O] , and [TMPH+·NO3·2.5H2O] (TPP = thiamine pyrophosphate, TMP = thiamine monophosphate) were synthesized in methanol or water systems at room temperature. They were characterized by elemental analysis, IR spectrocopy, and single X-ray diffraction. St...


Four pH-Dependent 1D CoII/NiII Coordination Polymers Based on a Terphenyl-2,2′,4,4′-Tetracarboxylic Acid: Syntheses, Structures, and Magnetic Properties
Four CoII/NiII coordination polymers, namely, [M(H3L)2(H2O)2]n (1, 2) and [M(H2L)(H2O)3]n (3, 4), (M = Co for 1 and 3, M = Ni for 2 and 4, H4L = terphenyl-2,2′,4,4′-tetracarboxylic acid) were synthesized through hydrothermal reactions at different pH values and structurally characterized. Single crystal X-ray crystallographic analysis reveals that compounds 1 and 2 are isostructural and exh...
Nanopowder processing of ultrafine Si3N4 with improved wear resistance
The processing, microstructure, and material properties of monolithic Si3N4 were investigated by using two amorphous Si3N4 nanopowders doped with (1) 6wt% Y2O3 and 6wt% Y2O3 +8wt% Al2O3. The orthorhombic Si2N2O-based phase was found in the two as-sintered bulks. Carbothermal reduction treatment (CRT) was thus applied at 1400°C for 10h with 3wt% and 6wt% carbon black added to the precursor powd...


Continuous Microwave-Assisted Gas–Liquid Segmented Flow Reactor for Controlled Nucleation and Growth of Nanocrystals
Hot-injection techniques are currently the state-of-the-art method for the synthesis of high-quality colloidal nanocrystals (NCs) but have typically been limited to small batch reactors. The nature of this method leads to local fluctuations in temperature and concentration where inhomogeneity due to mixing makes precise control of reaction conditions very challenging at a large scale. Therefore...
2-Ethyl-1-[5-(4-methylphenyl)pyrazol-3-yl]-3-(thiophene-2-carbonyl)isothiourea: molecular ribbons containing three types of hydrogen-bonded ring
The title compound, C18H18N4OS2, was prepared by reaction of S,S-diethyl 2-thenoylimidodithiocarbonate with 5-amino-3-(4-methylphenyl)-1H-pyrazole using microwave irradiation under solvent-free conditions. In the molecule, the thiophene unit is disordered over two sets of atomic sites, with occupancies of 0.814  and 0.186 , and the bonded distances provide evidence for polarization in the a...


One- and two-dimensional CdII coordination polymers incorporating organophosphinate ligands
Reaction of cadmium nitrate with diphenylphosphinic acid in dimethylformamide solvent yielded the one-dimensional coordination polymer catena-poly[[bis(dimethylformamide-κO)cadmium(II)]-bis(μ-diphenylphosphinato-κ2O:O′)], [Cd(C12H10O2P)2(C3H7NO)2]n, (I). Addition of 4,4′-bipyridine to the synthesis afforded a two-dimensional extended structure, poly[[(μ-4,4′-bipyridine-κ2N:N′)bis(...
Icosahedral symmetry breaking: C60 to C78, C96 and to related nanotubes
Exact icosahedral symmetry of C60 is viewed as the union of 12 orbits of the symmetric subgroup of order 6 of the icosahedral group of order 120. Here, this subgroup is denoted by A2 because it is isomorphic to the Weyl group of the simple Lie algebra A2. Eight of the A2 orbits are hexagons and four are triangles. Only two of the hexagons appear as part of the C60 surface shell. The orbits form...

An accurate parameterization for scattering factors, electron densities and electrostatic potentials for neutral atoms that obey all physical constraints
An efficient procedure and computer program are outlined for fitting numerical X-ray and electron scattering factors with the correct inclusion of all physical constraints. The numerical electron scattering factors have been parameterized using five analytic non-relativistic hydrogen electron scattering factors as basis functions for 103 neutral atoms of the periodic table. The inclusion of the...
Effects of Forming Conditions and TiC–TiB 2 Contents on the Microstructures of Self-Propagating High-Temperature Synthesized NiAl–TiC–TiB 2 Composites
The NiAl–TiC–TiB2 composites were processed by self-propagating high-temperature synthesis (SHS) method using raw powders of Ni, Al, Ti, B4C, TiC, and TiB2, and their microstructure and micro-hardness were investigated. The TiC–TiB2 in NiAl matrix, with contents from 10 to 30 wt%, emerged with the use of two methods: in situ formed and externally added. The results show that all final pro...

Mosaics, Quilts, Science and Crystal Structures – Which one Inspires the Other?
This paper gives some examples of the strange relations between mosaics and crystal structures, their respective contributions to the representation and a possible way to create new solid matter.
Numerical Simulation of Flow-Induced Wall Shear Stresses in Three Different Shapes of Multi-Strand Steelmaking Tundishes
Tundish is an important vessel in the steelmaking circuitry where quality of steel can be optimized by carrying out various metallurgical operations. Nowadays, tundish is designed and operated to ensure maximum yield, superior cleanliness, and longer life. It is designed to operate at high temperatures and lined with different grades of expensive refractory materials. During casting process, li...

Generation of Group VI Piano-Stool and Triple-Decker Complexes from [(IMes)2PtH(Cl-boratabenzene)] Species
Species [(IMes)2Pt(H)(1-Cl-2-SiMe3–BC5H4)] (1) was used as the source of the Cl-boratabenzene anion for coordination to group VI transition metals, resulting in the formation of piano-stool complexes [(η6-1-Cl-2-SiMe3–BC5H4)M(CO)3]– [M = Cr , Mo , W ] and a homodimetallic triple-decker complex [(CO)3Cr(η6-1-Cl-2-SiMe3–BC5H4)Cr(CO)3]– . All species were spectroscopically characterize...
Structurally Characterized Antipyrine-Based Dual Fluorescent Probe: Enhanced AlIII Selectivity of a Dinuclear ZnII Complex for Intracellular Sensing by a Displacement Approach
The antipyrine-based fluorescence probe daph, structurally characterized by single-crystal X-ray diffraction, can recognize both Zn2+ (at 520 nm, yellow) and Al3+ (at 490 nm, green). However, Al3+ selectivity is enhanced significantly when the dinuclear ZnII-daph complex is used as a sensor, which senses Al3+ by a displacement approach. The binding constants of daph for Zn2+ and Al3+ are (4.9...
Mono-Oxido-Bridged Heterobimetallic and Heterotrimetallic Compounds Containing Titanium(IV) and Chromium(III)
A series of oxido-bridged heterobi- and heterotrimetallic complexes, [(tmtaa)Ti=OCr(Por)Cl] and [(tmtaa)Ti=OCr(Por)O=Ti(tmtaa)]+ (tmtaa = 7,16-dihydro-6,8,15,17-tetramethyldibenzo[b,i][1,4,8,11]tetraazacyclotetradecine; Por = 5,10,15,20-tetraarylporphyrin), have been synthesized. To the best of our knowledge, these complexes are the first structurally characterized examples to contain a Ti=OCr ...
Lithium Complexes of Asymmetric Hydrogen Tetraimido Sulfate
Two novel monolithiated complexes, [(thf)2Li(NtBu)2(NHtBu)S(Ndipp)] and [(thf)2Li(NtBu)2(NHtBu)S(Ndmp)] , are presented from the reaction of the neutral tri(tert-butyl)sulfur triimide S(NtBu)3 (1), nBuLi, and diisopropylaniline and dimethylaniline, respectively. These asymmetrically substituted hydrogen tetraimido sulfate complexes of lithium provide the opportunity to switch the metal in a tra...