Structure, photoluminescent properties and photocatalytic activities of a new Cd(II) metal-organic framework.

A new metal-organic framework, [Cd(TDC)(bix)(H2O)]n (H2TDC = thiophene-2,5-dicarboxylic acid; bix = 1,4-bis(imidazol-1-ylmethyl)benzene), has been synthesized under hydrothermal conditions and structurally characterized by elemental analysis, infrared spectroscopy, thermogravimetric analysis, UV-vis and single X-ray diffraction. Cd-MOF is a 2D infinite layer framework, which is further interconnected by hydrogen-bond interactions leading to a 3D supramolecular architecture. The photoluminescent properties of the Cd-MOF were investigated and this compound shows intense fluorescent emissions in the solid state. In addition, it exhibits good photocatalytic activities for the degradation of methyl organic under UV light irradiation.

Bis(1H-benzimidazole-κN(3))bis-[2-(naphthalen-1-yl)acetato-κ(2)O,O']nickel(II) monohydrate.

In the title compound, [Ni(C(12)H(9)O(2))(2)(C(7)H(6)N(2))(2)]·H(2)O, The Ni(II) cation is located on a twofold rotation axis and is six-coordinated in a distorted NiN(2)O(4) octa-hedral geometry. The asymmetric unit consists of a nickel(II) ion, one 2-(naphthalen-1-yl)acetate anion, a neutral benzotriazole ligand and one half of a lattice water mol-ecule. The crystal packing is stabilized by O-H⋯O and N-H⋯O hydrogen bonds. The title compound is isotypic with its Cd(II) analogue.

Pyrrolidin-1-ium 2-(naphthalen-1-yl)acetate-2-(naphthalen-1-yl)acetic acid (1/1).

In the title compound, C(4)H(10)N(+)·C(12)H(9)O(2) (-)·C(12)H(10)O(2), the pyrrolidine ring adopts an envelope conformation and the dihedral angle between the planes of the two naphthalene ring systems is 8.34 (10)°. The crystal structure is stabilized by O-H⋯O and N-H⋯O hydrogen bonds.

Diaqua-bis-(1-methyl-1H-imidazole-κN(3))bis-[2-(naphthalen-1-yl)acetato-κO]cobalt(II).

In the title compound, [Co(C(12)H(9)O(2))(2)(C(4)H(6)N(2))(2)(H(2)O)(2)], the Co(II) ion is located on an inversion centre and displays a distorted octa-hedral coordination geometry. Two O atoms from two water mol-ecules and two carboxyl-ate O atoms from two 2-(naphthalen-1-yl)acetate ligands are in the equatorial plane and two N atoms from two 1-methyl-1H-imidazole ligands are in the axial positions. The structure is stabilized by intra-molecular O-H⋯O hydrogen bonds. Inter-molecular O-H⋯O hydrogen bonds link the complex mol-ecules into chains along [100].

Bis-(2-methyl-1H-imidazole-κN)bis[2-(naphthalen-2-yl)acetato-κO]copper(II).

In the crystal structure of the title compound, [Cu(C(12)H(9)O(2))(2)(C(4)H(6)N(2))(2)], the Cu(II) cations are square-planar coordinated by two 1-naphthyl-acetate anions and two 2-methyl-imidazole ligands into discrete complexes that are located on centres of inversion. These complexes are linked into chains parallel to [010] by inter-molecular N-H⋯O hydrogen bonding between the N-H H atom of the 2-methyl-imidazole ligands and the carboxyl-ate O atoms that are not involved in metal coordination.

Bis(1-methyl-1H-imidazole-κN)bis-[2-(naphthalen-1-yl)acetato-κO]copper(II) monohydrate.

In the crystal structure of the title compound, [Cu(C(12)H(9)O(2))(2)(C(4)H(6)N(2))(2)]·H(2)O, the Cu(II) atom is coordinated by two 2-(naphthalen-1-yl)acetate anions and two 1-methyl-imidazole ligands, giving monomeric complexes with a square-planar coordination environment. Two complex mol-ecules and two water mol-ecules form a centrosymmetric ring system via O-H⋯O hydrogen bonds.

Bis(ethyl-enediamine-κN,N')bis-(phenytoinato-κN)cobalt(II).

THE TITLE COMPOUND [SYSTEMATIC NAME: bis(2,5-dioxo-4,4-diphenylimidazolidin-1-ido-κN(1))bis(ethylenediamine-κ(2)N,N')cobalt(II)], [Co(C(15)H(11)N(2)O(2))(2)(C(2)H(8)N(2))(2)], has site symmetry . The Co(II) cation is located on an inversion center and coordinated by two phenytoin anions and two ethyl-enediamine ligands in a distorted octa-hedral geometry. In the phenytoin anion, the two phenyl rings are twisted with respect to the central hydantoin ring, making dihedral angles of 77.49 (16) and 64.55 (15)°. Intra-molecular and inter-molecular N-H⋯O hydrogen bonding is present in the crystal structure.

1,4-Bis{3-[4-(dimethyl-amino)benzyl-ideneamino]prop-yl}piperazine.

The mol-ecule of the title compound, C(28)H(42)N(6), has site symmetry with the centroid of the piperazine ring located on an inversion center. The piperazine ring adopts a chair conformation. The benzene ring and propyl-piperazine are on opposite sides of the C=N bond, showing an E configuration.

4-(2-Hydroxy-benzyl-idene)-3-methyl-isoxazol-5(4H)-one.

The mol-ecular skeleton of the title mol-ecule, C(11)H(9)NO(3), is approximately planar (r.m.s. deviation = 0.0056 Å); the two rings form a dihedral angle of 6.5 (1)°. In the crystal structure, inter-molecular O-H⋯N hydrogen bonds involving the H atom of the hydr-oxy group and the N atom of the isoxazole ring link mol-ecules into chains running along the c axis.

Study on the extraction, purification and quantification of jasmonic acid, abscisic acid and indole-3-acetic acid in plants.

INTRODUCTION: Jasmonic acid (JA), abscisic acid (ABA) and indole-3-acetic acid (IAA) are important plant hormones. Plant hormones are difficult to analyse because they occur in small concentrations and other substances in the plant interfere with their detection. OBJECTIVE: To develop a new, inexpensive procedure for the rapid extraction and purification of IAA, ABA and JA from various plant species. METHODOLOGY: Samples were prepared by extraction of plant tissues with methanol and ethyl acetate. Then the extracts were further purified and enriched with C(18) cartridges. The final extracts were derivatised with diazomethane and then measured by GC-MS. The results of the new methodology were compared with those of the Creelman and Mullet procedure. RESULTS: Sequential elution of the assimilates from the C(18 )cartridges revealed that IAA and ABA eluted in 40% methanol, while JA subsequently eluted in 60% methanol. The new plant hormone extraction and purification procedure produced results that were comparable to those obtained with the Creelman and Mullet's procedure. This new procedure requires only 0.5 g leaf samples to quantify these compounds with high reliability and can simultaneously determine the concentrations of the three plant hormones. CONCLUSION: A simple, inexpensive method was developed for determining endogenous IAA, ABA and JA concentrations in plant tissue.