The first enantiomerically pure 2,2'-bipyridine-based cryptand is reported. Complexation of this macrobicyclic ligand with the trivalent lanthanoid cations Yb and Lu produces enantiomerically and diastereomerically pure cryptates in solution. The Yb cryptate shows near-IR photoluminescence with lifetimes of up to τ = 29.8 μs in CD3OD.

Structural aspects of the binding of inorganic anions such as perchlorate, hydrogen sulfate, and hexafluorosilicate with the proton cage of octaaminocryptand L(1), N(CH(2)CH(2)NHCH(2)-p-xylyl-CH(2)NHCH(2)CH(2))(3)N), are examined thoroughly. Crystallographic results for a hexaprotonated perchlorate complex of L(1), [(H(6)L(1))(6+)(ClO(4) (-))]5(ClO(4) (-)).11H(2)O.CH(3)CN (1), an octaprotonated...

In multiphase extraction [18F]fluoride ion for radiolabeling is recovered from target water by passage through a small column of microporous polymer impregnated with a lipophilic cryptand or quaternary ammonium salt. The 18O enriched water can be recovered for reuse. The [18F]fluoride ion-pair is eluted from the column by a small volume of acetonitrile or other organic solvent. Evaporation of t...

Reproducible materials that have detection properties towards a certain molecule are very important for applications in the fabrication of devices. Among all substrates used, highly oriented pyrolytic graphite allows to clearly image monolayer. On other hand, cryptand molecules versatile because they can sense analytes with high selectivity. The electrode was first functionalized an aryl bearin...

In the crystal structure of the title compound, C(33)H(39)N(3)O(10)·C(3)H(6)O, the acetone mol-ecule is encapsulated into the cavity of the cryptand and fixed by two N-H⋯O and one C-H⋯O hydrogen bond. C-H⋯O and C-H⋯N inter-actions link neighbouring cryptands. The dihedral angles between the pyridine ring and the benzene rings are 86.47 (17) and 85.53 (13)°.

The title salt, [K(C18H36N2O6)][Co(CO)4], is an example of a classical carbonyl-metalate. The asymmetric unit contains one cation and one tetrahedral anion, both in general positions. Based on comparison of the four carbonyl C-O bond lengths and C-Co-C angles, the anion is unperturbed by the cation, which is normal for an alkali metal fully encased by a cryptand cage.

Treatment of [{Ti(η(5)-C5Me5)(μ-NH)}3(μ3-N)] (1) with zirconium or hafnium tetrachloride adducts [MCl4(thf)2] affords complexes [Cl3M{(μ3-N)(μ3-NH)2Ti3(η(5)-C5Me5)3(μ3-N)}] (M = Zr (2), Hf (3)). Titanium chloride complexes [Cl2Ti{(μ3-N)2(μ3-NH)Ti3(η(5)-C5Me5)3(μ3-N)}] (4) and [(Me2NH)ClTi{(μ3-N)3Ti3(η(5)-C5Me5)3(μ3-N)}] (5) are obtained by reaction of 1 with [TiCl4-x(NMe2)x] (x = 2, 3). The dim...