Supramolecular assemblies derived from methyl-substituted cucurbit[5]uril and lanthanide nitrates.

Interaction of the lanthanide nitrates M(NO) (M = Gd, Eu) with methylcucurbit[5]uril (MeQ[5]) in the presence of transition metal chlorides (ZnCl and FeCl) in acidic media resulted in the isolation of the complexes [MeQ[5]Gd(HO)Cl Gd(HO)](ZnCl)∙Cl∙8.9H2O () and [MeQ[5]Eu(HO)Cl(HO)](FeCl) (). The molecular structures of  and  have been determined by single crystal X-ray crystallography, and reveal discrete complexes which are involved in dense stacking with adjacent MeQ[5]s linked via H-bonding and/or metal anions resulting in a supramolecular assembly.

Metal Cation-Doped -Cucurbit[10]uril: Adsorption of Para-Phenylenediamine.

The separation of phenylenediamine (PDA) isomers is crucial in the field of chemical manufacturing. Herein, we presented a strategy for the separation of PDA isomers (para-phenylenediamine, -PDA; meta-phenylenediamine, -PDA; ortho-phenylenediamine, -PDA) using four supramolecular framework materials of -cucurbit[10]uril (-Q[10]), (1) -Q[10](Cd), (2) -Q[10](Mn), (3) -Q[10](Cu), (4) -Q[10](Pb). Our findings indicated that these supramolecular framework materials of -Q[10] showed remarkable selectivity for para-phenylenediamine (-PDA) in -PDA, -PDA, and -PDA mixtures, respectively.

Effect of Sn Content on the Microstructure and Properties of Wire and Arc Additive Manufactured Al-Cu Alloy Deposits.

Al-Cu-Sn alloy deposits with different Sn contents were prepared by the wire and arc additive manufacturing process. The microstructure and mechanical properties of the deposits were examined by metallography, scanning electron microscopy, energy-dispersive X-ray spectroscopy, transmission electron microscopy, and tensile tests. The results indicated that the addition of Sn significantly refined the microstructure of the deposits in their as-deposited state, and the grains were transformed from dendrites to equiaxed crystals with a uniform grain size of ∼30 μm.

Coordination and Supramolecular Assemblies of Fully Substituted Cyclopentanocucurbit[6]uril with Lanthanide Cations in the Presence of Tetrachlorozincate Anions, and Their Potential Applications.

Coordination and supramolecular assemblies of a fully substituted cyclopentanocucurbit[6]uril (CyPQ[6]) with a series of lanthanide cations (Ln) have been investigated in the presence of tetrachlorozincate anion ([ZnCl]). X-ray single-crystal diffraction analysis has revealed that the interaction of CyPQ[6] and a series of Lncations unexpectedly results in the formation of at least seven different CyPQ[6]-based coordination complex adduct and supramolecular assemblies groups, including with (1) La, Cecations; (2) Pr, Ndcations; (3) Eu, Gd, Tb, Dy with P1̅ or P1 space group, in which CyPQ[6] molecules coordinate alternatively with Lncations and form linear coordination polymers; (4) CyPQ[6] molecules interact alternatively with [Ho(HO)] aqueous complexes and form linear supramolecular chains; CyPQ[6] molecules can assemble two different Ln free porous supramolecular assemblies from CyPQ[6]-Ln(NO)-ZnCl-HCl systems, Ln = Tm, Yb, and Lu; however, no solid crystals were obtained from system containing Ercation. Thus, these differences could lead CyPQ[6] to be useful in not only the isolation of lighter lanthanides from their heavier lanthanides but also special selectivity for different volatile organic compounds.

N-(3,4-Diethoxy-phen-yl)acetamide.

In the title compound, C(12)H(17)NO(3), the conformations of the N-H and C=O bonds are anti to each other. In the crystal structure, N-H⋯O hydrogen-bond inter-actions help to establish the packing.

2,2'-(Hexane-1,6-di-yl)diisoquinolinium tetra-chloridozincate(II).

The asymmetric unit of the title compound, (C(24)H(26)N(2))[ZnCl(4)], consists of two 2,2'-(hexane-1,6-di-yl)diisoquinolinium cations and two [ZnCl(4)](2-) complex anions. The [ZnCl(4)](2-) anions have a distorted tetra-hedral geometry. The dihedral angles between the isoquinoline rings of the two cations are nearly equal [16.

1,3,5,7,9,11,13,15-Octa-azapenta-cyclo-[9.5.1.1.0.0]octa-decane-4,8,12,16-tetrone monohydrate: a methyl-ene-bridged glycoluril dimer.

In the title compound, C(10)H(12)N(8)O(4)·H(2)O, prepared from the reaction of glycoluril with paraformaldehyde, the organic molecule has mm symmetry. The asymmetric unit comprises one quarter of the mol-ecule and a half-mol-ecule of water. The dimer is formed by bridging two glycoluril mol-ecules with methyl-ene groups at the 1 and 6 positions.

[Spectral studies of novel Na specific adsorbent Li(1+x)Al(x)Ti(2-x)(PO4)3].

A novel Na specific adsorbent Li(1+x)Al(x)Ti(2-x)(PO4)3 was synthesized by high temperature solid state reaction method. The samples were characterized by X-ray diffraction(XRD) and scanning electron microscope(SEM). Raman and FTIR spectroscopic studies of these materials were carried out, and the vibrational bands were assigned.