Eu-MOFs with 2-(4-carboxyphenyl)imidazo[4,5-f]-1,10-phenanthroline and ditopic carboxylates as coligands: synthesis, structure, high thermostability, and luminescence properties.

Hydrothermal reactions of europium(III) salt with 2-(4-carboxyphenyl)imidazo[4,5-f]-1,10-phenanthroline and dicarboxylic acid as coligands-benzene-1,4-dicarboxylic acid, 4,4'-biphenyldicarboxylic acid, 2,5-dibromoterephthalic acid, and naphthalene-1,4-dicarboxylic acid-lead to four europium fluorescent materials (1-4). Structural analyses reveal that 1-4 have binuclear 3D metal-organic frameworks with different channels, void volumes, and conjugated structures tuned by ditopic carboxylates. There are no latticed and coordinated water molecules occurring in 1-3, while the free water molecules fill in 1D channels of 4.

2-(5-Amino-2H-tetra-zol-2-yl)acetic acid.

In the title mol-ecule, C(3)H(5)N(5)O(2), the tetra-zole ring and carboxyl group form a dihedral angle of 82.25 (14)°. In the crystal, adjacent mol-ecules are linked through O-H⋯N, N-H⋯O and N-H⋯N hydrogen bonds into layers parallel to the bc plane.

A new polymorph of 5,5'-(ethane-1,2-di-yl)bis-(1H-tetra-zole).

The asymmetric unit of the title compound, C(4)H(6)N(8), contains a quarter of the mol-ecule, which possesses a crystallographically imposed centre of symmetry with all non-H atoms situated on a mirror plane. The crystal packing exhibits inter-molecular N-H⋯N hydrogen bonds and π-π stacking inter-actions between the tetra-zole rings of adjacent mol-ecules [centroid-centroid distance = 3.4402 (10) Å].

Ethane-1,2-diaminium bis-{5-[4-(1H-tetra-zol-5-yl)phen-yl]tetra-zolide} dihydrate.

In the two anions of the title salt, C(2)H(10)N(2) (2+)·2C(8)H(5)N(8) (-)·2H(2)O, the central aromatic rings make dihedral angles of 13.53 (6) and 6.53 (7)° with the deprotonated tetra-zole rings, and 11.

Bis[(1-methyl-1H-tetra-zol-5-yl)sulfan-yl]ethane.

The title compound, C(6)H(10)N(8)S(2), was prepared by the nucleophilic substitution reaction of 5-mercapto-1-methyl-tetra-zole and dichloro-ethane. In the crystal, the mol-ecule possesses an approximate non-crystallographic twofold symmetry axis. The crystal packing is stabilized by weak inter-molecular C-H⋯N and π-π inter-actions [centroid-centroid distances = 3.

Bis[(1-methyl-1H-tetra-zol-5-yl)sulfan-yl]methane.

The mol-ecule of the title compound, C(5)H(8)N(8)S(2), lies on a twofold rotation axis that relates on 1-methyl-tetra-zolyl group to the other; the five-membered rings are twisted by 53.1 (1)°.