Photoluminescences and 3D supramolecular structure with unique dimeric Zn (II) units featuring 2-substituted 8-hydroxyquinoline

Crystal structure of methyl (E)-4-[2-(8-hy-droxy-quinolin-2-yl)vin-yl]benzoate

The title compound, C₁₉H₁₅NO₃, was synthesized by a Perkin reaction of 2-methyl-8-hy-droxy-quinoline and 4-formyl-2-methyl-benzoate in acetic anhydride under a nitro-gen atmosphere. The mol-ecule has an E conformation about the C=C bond, and the quinoline ring system and the benzene ring are inclined to one another by 29.22 (7)°. There is an intra-molecular O-H⋯N hydrogen bond in the 8-hy-droxy-quinoline moiety. In the crystal, mol-ecules are linked by pairs of O-H⋯O hydrogen bonds, forming inversion dimers with an R₂²(28) ring motif. The dimers are linked by C-H⋯O hydrogen bonds and C-H⋯π inter-actions, forming sheets parallel to plane (10-1).

Five 8-hydroxyquinolinate-based coordination polymers with tunable structures and photoluminescent properties for sensing nitroaromatics

Five coordination polymers with different structures have been prepared. The tunable structures and photoluminescent properties for sensing nitroaromatics in five polymers were observed.

Six Zn(ii) and Cd(ii) coordination polymers assembled from a similar binuclear building unit: tunable structures and luminescence properties

Six coordination polymers with different structures have been prepared. The tunable structures and photoluminescence properties were observed due to their different metal centers and supramolecular structures.

Three Mn(ii) coordination polymers with a bispyridyl-based quinolinate ligand: the anion-controlled tunable structural and magnetic properties

Three anion-controlled Mn(ii) coordination polymers were assembled from a bispyridyl-based quinolinate ligand.

(E)-2-[2-(4-Carb-oxy-phen-yl)ethen-yl]-8-hydroxy-quinolin-1-ium chloride ethanol monosolvate

In the title compound, C18H14NO3 (+)·Cl(-)·CH3CH2OH, the dihedral angle formed by the mean planes of the quinolinium and benzene rings is 3.4 (1)°, while the carb-oxy substituent is tilted at an angle of 4.8 (1)° with respect to the benzene ring. There is a short N-H⋯O contact in the cation. In the crystal, due to the planar mol-ecular geometry, two-dimensional aggregates are formed parallel to (221) via C-H⋯O, C-H⋯Cl, O-H⋯Cl and N-H⋯Cl hydrogen bonds. Inter-layer association is accomplished by O-Hethanol⋯Cl and O-H⋯Oethanol hydrogen bonds and π-π stacking inter-actions [centroid-centroid distances vary from 3.6477 (12) to 3.8381 (11) Å]. A supra-molecular three-dimensional architecture results from a stacked arrangement of layers comprising the ionic and hydrogen-bonded components.