Yong-Lan Feng

3-[4-(Dimethyl-amino)phen-yl]-1-(2-pyrrol-yl)prop-2-en-1-one.

The molecule of the title compound, C15H16N2O, is non-planar with a dihedral angle of 16.0 (1)° between the pyrrole and benzene rings. The ketone double-bond displays an s–cis conformation with an O=C—C=C torsion angle of 7.9 (3) and an intramolecular C—H⋯O hydrogen bond. In the crystal structure, adjacent molecules are paired through N—H⋯O hydrogen bonds into centrosymmetric dimers.

Dichlorido(4′-ferrocenyl-2,2′:6′,2′′-terpyridine-κ3N,N′,N′′)zinc acetonitrile monosolvate

The title complex, [FeZn(C5H5)Cl2(C20H14N3)]·CH3CN, is composed of one ZnII atom, one 4′-ferrocenyl-2,2′:6′,2′′-terpyridine (fctpy) ligand, two Cl atoms and one acetonitrile solvent molecule. The ZnII atom is five-coordinated in a trigonal–bipyramidal geometry by the tridentate chelating fctpy ligand and two Cl atoms.

(4′-Ferrocenyl-2,2′:6′,2′′-terpyridine-κ3N,N′,N′′)(1,10-phenanthroline-κ2N,N′)copper(II) bis(perchlorate) acetonitrile solvate

The title complex, [CuFe(C5H5)(C20H14N3)(C12H8N2)](ClO4)2·C2H3N, consists of a mononuclear [Cu(C12H8N2)(C25H19FeN3)]2+ cation, two ClO4 − anions (one of which is disordered over two positions with equal occupancy) and one CH3CN solvent molecule. The CuII center has a distorted square-pyramidal coordination with three N atoms of the 4′-ferrocenyl-2,2′:6′,2′′- terpyridine (fctpy) ligand and one 1,10-phenanthroline (phen) N atom in the basal plane and a second phen N atom in the apical position with an axial distance of 2.254 (4) Å. The disordered ClO4 − anion is weakly coordinated to the CuII ion with a Cu—O distance of 2.766 (11) Å. The two cyclopentadienyl rings of the ferrocenyl group are almost eclipsed with a deviation of 4.7 (1) °, and are involved in intermolecular π–π interactions with the outer pyridyl rings of the fctpy ligands [centroid–centroid distance = 3.759 (2) Å.].

A new two-dimensional extended adenine and thiophenecarboxylate mixed-ligand zinc(II) complex: synthesis, structure, thermostability and luminescent properties.

The design and preparation of crystalline polymeric materials has attracted increasing attention due to their diverse applications as functional materials in gas storage, separation, catalysis, sensing and photoluminescence. The judicious selection of organic linkers is critical for varying the coordination behaviour of the metal ions and determining the overall characteristics of the networks. A new adenine-based Zn(II) coordination polymer, [Zn(C6H2O4S)(C5H5N5)]n or [Zn(tdc)(9H-ade)] (H2tdc is thiophene-2,5-dicarboxylic acid and ade is adenine), has been prepared hydrothermally and the crystal structure exhibits in its packing two-dimensional (4,4) grid sheets parallel to the ab plane, featuring two distinct square cavities delimited by the two types of ligands and the Zn(II) ions with the dimensions 6.6 × 6.6 and 10.2 × 10.2 Å (based on the Zn...Zn distance). The title complex shows enhanced photoluminescence at 378 nm compared to the free ligands, suggesting that the coordination of H2tdc or adenine to the metal centre effectively increases the rigidity of the ligands and reduces the energy loss by radiative decay of intraligand excited states.

(4′-Ferrocenyl-2,2′:6′,2′′-terpyridine-κ3N1,N1′,N1′′)(1,10-phenanthroline-κ2N,N′)zinc(II) bis­(perchlorate) acetonitrile monosolvate

In the title complex, [FeZn(C5H5)(C20H14N3)(C12H8N2)](ClO4)2·CH3CN, the ZnII atom is five-coordinated by a tridentate chelating 4′-ferrocenyl-2,2′:6′,2′′-terpyridine (fctpy) ligand and a bidentate chelating 1,10-phenanthroline (phen) ligand in a distorted square-pyramidal environment with a phen N atom located at the apical position [Zn—N = 2.259 (4) Å]. The terpyridyl motif in each fctpy ligand is coplanar, but the cyclopentadienyl ring is twisted by 9.5 (2)° out of coplanarity with each central pyridine. The two cyclopentadienyl rings of the ferrocenyl group are almost eclipsed with a deviation of 4.5 (1)°. In addition, intermolecular π–π interactions [centroid–centroid distance 3.753 (2) Å] are present between the cyclopentadienyl and outer pyridyl rings of the fctpy ligands. One of the perchlorate anions is equally disordered over two positions.

Triaqua-1κO,2κ2O-bis­(2,2′-bipyridine)-1κ2N,N′;2κ2N,N′-chlorido-1κCl-μ-terephthalato-1:2κ2O1:O4-dicopper(II) nitrate monohydrate

In the binuclear title compound, [Cu2(C8H4O4)Cl(C10H8N2)2(H2O)3]NO3·H2O, the two crystallographically independent CuII ions have similar coordination environments. One of the CuII ions has a square-pyramidal arrangement, which is defined by a water molecule occupying the apical position, with the equatorial ligators consisting of two N atoms from a 2,2′-bipyridine molecule, one carboxylate O atom from a terephthalate ligand and one O atom from a water molecule. The other CuII ion has a similar coordination environment, except that the apical position is occupied by a chloride ligand instead of a water molecule. An O—H⋯O and O—H⋯Cl hydrogen-bonded three-dimensional network is formed between the components.

1-(2-Naphth-yl)-3-phenyl-prop-2-en-1-one.

The title compound, C19H14O, contains two independent molecules with the same s-cis conformation for the ketone unit. Both molecules are non-planar with dihedral angles of 51.9 (1) and 48.0 (1)° between the benzene ring and the naphthalene ring system. In the crystal, neighboring molecules are stabilized by intermolecular C—H⋯π interactions, giving a two-dimensional supramolecular array parallel to the ab plane.

2,4,6-Tri-p-tolyl­pyridine

In the title compound, C26H23N, the complete molecule is generated by crystallographic mirror symmetry, with the N atom and four C atoms lying on the reflection plane. The dihedral angles between the pyridine ring and pendant benzene rings are 2.9 (1), 14.1 (1) and 14.1 (1)°. Neighbouring molecules are stabilized through intermolecular π–π interactions along the c axis [centroid-to-centroid distance = 3.804 (2) Å], forming one-dimensional chains.